1. An FMS system, besides controlling navigation, thrust and auto-nav, also provides a) take-off and landing warnings b) dedicated status and warnings c) GPWS warnings 2. EADI sky and ground display is provided by a) synthetic TV signals b) raster scan c) stroke pulse 3. HSI heading is valid if the heading flag is a) in view b) green c) out of view 4. A NOR gate with both inputs inverted becomes a a) NAND gate b) AND gate c) OR gate 5. An ARINC 429 binary coded decimal data word occupies bits a) 11 to 28 b) 11 to 29 c) 1 to 8 6. A fibre optic cable consists of a) a plastic core with a cladding having a higher refractive index b) a silica glass core with a cladding having a higher refractive index c) a silica glass core with a cladding having a lower refractive index 7. The command bars on an ADI relate to a) path required b) path being followed c) roll indications 8. The recording medium in an FDR is a) a high density floppy disc b) magnetic tape coated with ferrite c) copper foil coated with ferrite 9. Convert 0111012 to octal a) 25 b) 33 c) 35 10. What does the CADC feed a) Altimeter / FMS / secondary radar b) standby altimeter / machmeter c) cabin pressure controller sensor / machmeter / altimeter

1. ARINC 629 databus is a) one cable, bi-directional b) two cables, bi directional c) two cables, uni-directional 2. Requirements for software control can be found in a) AWN 45 b) JAR OPS c) JAR AWO 3. Software can be modified by a) licensed avionics engineers b) the manufacturer c) The same rules apply as to modifications to hardware 4. Two connected fibre optic cable ends are parallel but not quite touching. This is called a) lens connector b) end to end coupling c) end fire coupling 5. A disadvantage of a fibre optic cable is a) shallow bend radius allowed b) couplings susceptible to ingress of fluid c) end terminals are susceptible to environmental contamination 6. The inside of a CRT consists of a) an oxide coating and rare mercury gas b) a phosphor coating and rare mercury gas c) iodine and rare mercury gas 7. What kind of light is used in a fibre optic systems? a) Infrared b) Visible c) Ultraviolet 8. Typical displays on an EHSI are a) VOR, Map, Plan and weather radar b) VOR, Plan, Map and Attitude c) Engine indications 9. An EADI display showing a moving runway moves down during the final stages of an approach. The aircraft must a) fly up b) fly down c) hold descent path 10. An ARINC 573 data bus is used a) to input into a Digital Flight Data Recorder b) to input into a FDR Digital Acquisition Unit c) to supply digital inputs from a Symbol Generator to the EADI and EHSI

1. A flight data recorder can obtain information from aircraft instruments a) provided there is adequate isolation b) by direct connection to the instruments c) provided there is adequate damping 2. Adding invertors to the two inputs of an AND gate makes a a) NAND gate b) OR gate c) NOR gate 3. An ARINC 429 bus uses a) a twisted shielded pair of wires b) two bi-directional twin sheathed and earthed wires c) a single twin wire cable for each transmitter 4. CRT horizontal beam control is achieved by a a) square wave b) sawtooth wave c) sinusoidal wave 5. The ARINC 429 data bus word systems use a) decimal numbering b) hexadecimal numbering c) binary coded decimal 6. The binary number 11010111 expressed as a decimal is a) 207 b) 223 c) 215 7. The octal number 1001 expressed as a decimal is a) 65 b) 513 c) 9 8. This truth table is for a

A B C 0 0 0 1 0 0 0 1 0 1 1 1

a) NAND gate b) AND gate c) OR gate 9. The inputs and outputs of a CADC are a) pitot and static in; altitude, attitude, CAS and VS out b) pitot and static in; altitude, CAS, mach and VS out c) pitot in; static, altitude, mach, CAS and VS out 10. EICAS provides the following a) engine parameters only b) engine parameters and system warnings only c) engine parameters and engine warnings only

1. During an instrument approach, the glideslope pointer deflects below the glideslope centre mark. This means the aircraft is positioned a) above the glideslope b) below the glideslope c) to the left of the localiser 2. Engine parameters are displayed on a) ECAM b) EHSI c) FMSCDU 3. A central maintenance computer provides a) ground and flight monitoring and testing on an on-board computer b) ground and BITE testing using a portable control panel c) display of system warnings and cautions 4. ARINC 573 is related to what system? a) INS b) FDR c) Weather Radar 5. The rising runway is positioned from information derived from a) barometric height b) vertical speed c) radio altimeter 6. Where are the Digital Flight Data Recorder outputs supplied to? a) The recording unit b) Flight instruments c) There are no outputs 7. FMS failure and warnings are a) displayed on EICAS b) engine warnings only c) EFIS warnings only 8. Who is responsible for the operational program of the FMS? a) The pilot b) The engineer c) The manufacturer 9. Flight director command bars are moved to the correct position by a) position feedback b) amplifier gain c) calibration 10. If a signal has quantity in volts and physical position it is a) digital b) synchronous c) analogue

1. In a CRT, if the magnetic field is parallel to the Y plates, what will be the direction of the electron beam movement? a) Vertical b) No movement c) Horizontal 2. What is the fixed feature of an ADI? a) The glideslope pointer b) The lateral deviation bar c) The aircraft symbol 3. Primary colours of a CRT are a) red, green and blue b) red, green and yellow c) red, blue and yellow 4. What information is required before completion of the alignment of an Inertial Navigation System? a) Aircraft present position b) Aircraft present position and heading c) Heading and attitude 5. IRS accelerometers are mounted a) 60o to each other b) 45o to each other c) 90o to each other 6. An FMS navigation database is updated a) at the operators request b) once a month c) every 28 days 7. A single failure of a fly-by-wire system a) has no effect on aircraft operation b) will limit the flight profile c) will reduce operational heights and speeds 8. Fly-by-wire load alleviation function in turbulent conditions will result in a) ailerons moving symmetrically upwards b) ailerons and spoilers moving symmetrically upwards c) spoilers moving symmetrically upwards 9. Fly-by-wire roll control is achieved by a) ailerons b) spoilers c) spoilers and ailerons 10. The movement of fly-by-wire control surfaces are a) hydraulically controlled and electrically actuated b) both electrically controlled and electrically actuated c) electrically controlled and hydraulically actuated

1. ARINC 629 current mode couplers are a) capacitive b) resistive c) inductive 2. On an EADI, the Flight Director command bars show a) the actual path with respect to the required path b) the required path with respect to the actual path c) the path with respect to the horizon 3. What instrument includes a display of a rising runway? a) EADI b) EHSI c) ECAM 4. What are the effects of the X and Y plates on a CRT? a) X plates move the beam vertically, Y plates move the beam horizontal b) Y plates move the beam vertically, X plates move the beam horizontal c) X and Y plates can move the beam in either direction 5. ARINC 629 data bus is a) two buses, unidirectional b) two buses, bi-directional data flow c) one bus, bi-directional data flow 6. An FMS system, besides controlling navigation, thrust and auto-nav, also provides a) take-off and landing warnings b) dedicated status warnings c) GPWS warnings 7. In order to maintain HIRF protection, bonding checks between airframe and electrical components carrying voltages greater than 50 volts RMS or DC or main earth return should not exceed a) 1 megohm b) 1 ohm c) 0.05 ohm 8. Ribbon cables effected by mutual impedance and current loop leakage should be protected by a) shielding each individual conductor b) connecting all conductors to a common earth c) earthing each alternative conductor to separate point 9. EADI sky and ground display is provided by a) synthetic TV signals b) raster scan c) stroke pulse 10. Normal transmission order of ARINC 629 LRUs in periodic mode is in order of a) power up b) shortest to largest TG c) shortest to largest TI

1. What frequency creates the raster effect on a CRT? a) 50/60 Hz b) 400 Hz c) 250Hz 2. If an EFIS has 3 symbol generators, what is the purpose of the 3rd symbol generator? a) Comparison with No.1 symbol generator b) Standby c) Parity function 3. The sweep waveform used on a electromagnetic CRT is a) trapezoidal b) sinusoidal c) sawtooth 4. FMS operational program is updated every a) 7 days b) 28 days c) 90 days 5. Fibre optic data is sent by a) modulating the frequency of a laser beam b) modulating the frequency of a filament beam c) a strobe light 6. What is 345 in binary? a) 100111001 b) 110011001 c) 101011001 7. Which logic gate can be represented as a parallel circuit? a) OR gate b) Exclusive OR gate c) NAND gate 8. Software documentation procedures are laid down in a) AWN 45 b) JAA Ops c) MOE 9. HIRF is prevented from entering a fibre optic cable by a) enclosing it in a metal braid b) grounding the fibre at both ends c) using an opto-isolator coupling 10. In an ARINC 429 wordstring, bits 1 to 8 represent the a) source of message b) monitored parameter c) destination LRU address

1. ARINC 629 terminal transmit interval is a) unique to each terminal b) common to each terminal c) when all terminals are quiet 2. Continuity of a fibre optic cable is checked by a) a light source and an opto-power meter b) a calibrated light source c) a calibrated light source and an optometer 3. To shield a fibre optic from EMI you must a) earth both transducer and couplings b) shield it with a braided shield c) use an opto-isolator 4. A simbol generator displays ESDs warning. During replacement a) you must wear a wrist strap connected to an approved earth point b) make sure the pins are not touched and covers fitted c) you must earth the unit to the airframe structure 5. Magnetic deflection on a CRT is achieved by a a) sawtooth waveform b) trapezoidal waveform c) sinusoidal waveform 6. An FDR fitted to a helicopter begins recording a) on take-off b) on engine start-up c) when power is applied to the aircraft 7. MIL-ST-1533 is a data bus for a) Flight Data Recorders b) Inertial Reference System c) Digital Information Transfer System 8. Making an invertor from a NAND or NOR gate is achieved by a) inverting the input b) connecting two in series c) connecting the inputs 9. Parallel to series conversion is achieved by a) a parallel to series converter b) a shift register c) a multiplexer / demultiplexer 10. The FMS databases consist of a) one navigation and one performance database b) two performance and one navigation database c) one performance and two navigation databases

1. The FMS can update the IRS position outputs by using information from either a) VOR and DME only b) DME and GPS only c) GPS, DME, LOC and VOR 2. The accepted error from INS/IRS is a) 1 mile/hour + 3 miles b) 2 miles per hour + 3 miles c) 3 miles / hour + 3 miles 3. Before an IRS can complete the alignment sequence a) the shutdown present position must be entered b) the current present position must be entered c) either the last or current position must be entered 4. Within a computer controlled flight system, position feedback is converted from a) analogue to digital b) digital to analogue c) position feedback to rate feedback 5. What shape does the waveform take to counter the impedance effect of the coils in an electromagnetic controlled CRT? a) Trapezoid b) Sawtooth c) Rectangular 6. What warnings can an FMS provide? a) Discrete warnings b) Spurious faults c) Ground faults only 7. Centralised Aircraft Monitoring System a) performs in-flight and ground tests of aircraft systems by carrying out a BITE interrogation b) give red warnings and amber cautions to display system status c) performs in-flight BITE interrogation only 8. The control of the speed or rate that the flight director command bars move can be controlled by a) position feedback b) rate or velocity feedback c) amplifier gain 9. The Centralised Aircraft Monitoring System uses the maintenance mode of operation a) in the air only b) on the ground only c) either in the air or on the ground 10. The third EFIS Symbol Generator is operated a) with EICAS b) in an emergency c) as a standby to the No1 and No2 system

1. What functions are available on the EHSI? a) Full arc and Wx only b) Full arc, Wx and Map Mode c) Full Arc only 2. EFIS displays of the right hand and left hand displays are compared by comparators in the a) FMS b) EICAS c) Symbol Generators 3. What is the approximate earth rate? a) 5o/hour b) 10o/hour c) 15o/hour 4. An IRS platform has a) two accelerometers b) three accelerometers c) two or three accelerometers depending on the system 5. IRS Laser Ring Gyros provide a) rate movement about an axis b) displacement about an axis c) both rate and displacement about an axis 6. What are the outputs of a Digital ADC a) TAS, MACH, Altitude, TAT and SAT b) TAS, MACH and Altitude c) TAS, MACH, Altitude and TAT 7. ARINC 629 periodic mode is used for a) normal operation b) transferring data only on events important to aircraft operation c) database loads 8. A fibre optic data bus used on an aircraft a) connects non-essential systems only b) can transmit on several channels at the same time c) can send only one message at a time 9. Light travels along a fibre optic by a) reflection b) refraction c) dispersion 10. Manufacturers of aircraft can ensure HIRF protection by a) designing specific avionic areas that are shielded against HIRF b) ensuring all single wires are shielded with metal conduit c) advising operators of all points susceptible to deterioration due to corrosion, moisture ingress, flexing etc. Answers Question :1 The correct answer is b Read up on EFIS Question :2 The correct answer is c Read up on EFIS Question :3 The correct answer is c Aircraft Instruments and Integrated Systems. Pallett Page 102

Question :4 The correct answer is b Jeppesen Avionics Fundamentals Page 137 Question :5 The correct answer is a Jeppesen Avionics Fundamentals Page 137 Question :6 The correct answer is a Both Static and Total Air Temperatures are outputs of a digital ADC Question :7 The correct answer is a Read up ARINC 429 and 629 Question :8 The correct answer is b Read up on fibre optics Question :9 The correct answer is a Read up on fibre optics Question :10 The correct answer is a Understanding HIRF By Gerald L. Fuller This is exam number 11. You've been here 1 times. 1. How is data coupled to an ARINC data bus? a) By a capacitive pickup b) By an inductive pickup c) By a resistive pickup 2. An AND gate output is 1 when inputs are a) both 0 b) 1 and 0 c) both 1 3. What is hex 110 in decimal a) 272 b) 282 c) 32 4. Convert the binary word 1100 to decimal a) 16 b) 12 c) 11 5. How does MIL-STD-1533 put data onto the data bus? a) Through the bus controller b) R1 (remote terminal) c) SSIFU (sub-system interface unit) 6. If a data message is made up of 1 and 0 it is a) analogue b) digital c) logic 7. Convert the binary word 1110 to decimal a) 12 b) 14 c) 15 8. What sort of gate requires two positive voltages to operate a) NOT b) OR c) AND 9. What is the main disadvantage of a fibre optic data bus? a) Bend radius and moisture ingress at connections

b) Less strong and durable when compared to twisted pair and coaxial cable c) Expensive to install 10. When 4 binary serial counters are connected in cascade for frequency division, what division factor is required a) 4 b) 8 c) 16 Answers Question :1 The correct answer is b Read up on ARINC 429 and 629 data bus systems Question :2 The correct answer is c Read up on logic gates Question :3 The correct answer is a Read up on hexadecimal numbering system Question :4 The correct answer is b Read up on binary to decimal converion Question :5 The correct answer is a Read up on MIL-STD-1533 data bus systems Question :6 The correct answer is b Digital is 1s and 0s Question :7 The correct answer is b Read up on binary to decimal converion Question :8 The correct answer is c Read up on logic gates Question :9 The correct answer is a Read up on fibre optics Question :10 The correct answer is c Each serial counter changes its state once every 2 clock pulses. So 4 serial counters devides by 2x2x2x2 = 16 This is exam number 12. You've been here 1 times. 1. Magnetic deflection in a CRT is achieved by a) a sawtooth waveform b) a trapezoidal waveform c) a sinusoidal voltage 2. Fly By Wire systems in the fully active mode, the actuators will a) both be active b) one in active mode, one in damping mode c) both be in damping mode, awaiting control inputs 3. The parity bit in digital information is used a) for BITE programs b) to check the validity of data information c) to check the status of the system 4. On a Fly By Wire system, what controls the stab trim a) ELAC b) ELAC and SEC c) SEC 5. A disadvantage of a fibre optic cable is a) shallow bend radius b) couplings susceptible to ingress of fluid c) liable to environmental contamination of end terminals

6. ARINC 429 SDI word format is at bits a) 1 - 8 b) 9 - 10 c) 32 7. Convert the binary number 110010 to decimal a) 80 b) 50 c) 34 8. What is serial to parallel and vice-versa called a) Encoder/Decoder b) Multiplex/Demultiplex c) Switching 9. What is the parity bit for on an ARINC 429 bus a) To check for corruption during transmission of a word b) To act as a terminal gap in an emergency c) To delay the signal 10. 3 binary counters in cascade. What is the division? a) 8 b) 16 c) 32 Answers Question :1 The correct answer is b Do not get confused with electrostatic deflection (plates), which would be sawtooth Question :2 The correct answer is b Read up on Fly by Wire Question :3 The correct answer is b Read up on the purpose and use of parity bit Question :4 The correct answer is b ELAC = Elevator Aileron Computer, SEC = Spoilers Elevator Computer and FAC = Flight Augmentation Computers (rudder) Question :5 The correct answer is c Read up on fibre optics Question :6 The correct answer is b SDI = Source Destination Ident Question :7 The correct answer is b Read up on decimal conversions Question :8 The correct answer is b Read up on multiplexing Question :9 The correct answer is a Read up on purpose and use of parity bit Question :10 The correct answer is a Each serial counter changes its state once every 2 clock pulses. So 3 serial counters devides by 2x2x2 = 8 This is exam number 13. You've been here 1 times. 1. Control of software is by a) the National Aviation Authority b) engineers c) the aircraft manufacturers 2. A typical fibre optic connector is a) F-type connector b) coupling type, with lens fitted

c) push-pull connector 3. An ARINC 429 word label format is a) binary b) octal c) hexadecimal 4. Which of the following is an optelectronic device? a) Triac b) Thyristor c) Laser Diode 5. What is the advantage of a single mode fibre optic over ordinary wire? a) Large bandwidth b) Small bend radius c) Not prone to damage 6. How many LRUs can be connected to an ARINC 429 data bus a) 120 b) 20 c) 60 7. Convert the hexidecimal number D into decimal a) 13 b) 14 c) 14 8. Convert decimal 15 into binary a) 1101 b) 1111 c) 1110 9. Convert 448 to hex a) 3616 b) 2416 c) 2216 10. When will a NAND gate give logic 0 at the output? a) When both inputs are at 0 b) When both inputs are at 1 c) When the inputs are different Answers Question :1 The correct answer is a See AWN 45. Question :2 The correct answer is b Read up on fibre optics. Question :3 The correct answer is b Read up on ARINC 429 word format. Question :4 The correct answer is c Read up on optoelectronic devices (from Module 4). Question :5 The correct answer is a Read up on fibre optics. Question :6 The correct answer is b Read up on ARINC 429 and 629. Question :7 The correct answer is a Read up on hexidecimal numbering system. Question :8 The correct answer is b Read up on decimal to binary conversion. Question :9

The correct answer is b read up on octal to hex conversion. Question :10 The correct answer is b Read up on logic gates. This is exam number 14. You've been here 1 times. 1. How many LRUs can be connected to an ARINC 629 data bus a) 120 b) 20 c) 60 2. Convert decimal 15 into hexadecimal a) E b) G c) F 3. Which logic gate has this truth table

A B C 0 0 0 0 1 1 1 0 1 1 1 0

a) NOT b) Exclusive OR c) NAND 4. Which logic gate can be represented as a parallel circuit? a) OR b) Exclusive OR c) NAND 5. What is the definition of level one software? a) Critical b) Essential c) Non-essential 6. ESDS bags are sealed by a) zip locks b) ESDS labels c) twine (100% cotton) 7. What is 345 in binary? a) 101011001 b) 110011001 c) 100111001 8. What are the values of an ESDS wrist strap? a) 250 kilohms to 1.5 megohms b) 2 megohms to 5 megohms c) 2 gigohms to 4 gigohms 9. Convert 1D to binary a) 29 b) 11101 c) 101001 10. ARINC 629 terminal transmit interval is a) unique to each terminal b) common to each terminal c) is when all transmissions are quiet

Answers Question :1 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :2 The correct answer is c Read up on hexadecimal numbering system Question :3 The correct answer is b Read up on logic gates Question :4 The correct answer is a Read up on logic gates Question :5 The correct answer is a Read up on software classification Question :6 The correct answer is c Boeing manual says 100% cotton twine. Other manuals say ESDS label. However, it could be considered that ESDS labels do not 'seal'. Question :7 The correct answer is a Read up on decimal to binary conversion Question :8 The correct answer is a CAAIPs Leaflet 9-4 5.3.1 - closest answer Question :9 The correct answer is b Read up on hex to binary conversion Question :10 The correct answer is b The TI is common to all LRUs on ARINC 629 This is exam number 15. You've been here 1 times. 1. Convert 2C hex to octal a) 54 b) 44 c) 35 2. A fibre optic light source is normally a) a filament lamp b) a laser or LED c) a strobe light 3. What precautions are required when removing ESDS equipment a) Wear a wrist strap connected to an approved ground point b) Keep one hand on the airframe c) No special precautions are required 4. An ARINC 429 bus uses a) two bi-directional twin, sheathed and earthed wires b) a twisted shielded pair of wires c) a single twin cable for each transmitter 5. The minimum requirement for a cockpit voice recorder to begin operating is a) on engine startup b) on commencing the takeoff roll c) once established in the en-route climb 6. ARINC Communications Addressing and Reporting Systems is used to a) download aircraft status reports b) connect the aircraft to base c) make telephone calls 7. ARINC 429 data bus systems uses a) decimal numbering b) hexadecimal numbering c) binary coded decimal

8. With radio coupled autopilot, what are the inputs a) ADF and ILS b) ADF and VOR c) ILS and VOR 9. B-RNAV system must be capable of a) holding six waypoints b) displaying distance and bearing to waypoint c) reversing the waypoints for "fly-me-home" 10. The basic principle of radar is based upon a) the amount of power in the signal returned b) the time delay between outward and returning pulse c) ultrasonic wave propagation Answers Question :1 The correct answer is a Read up on hex to octal conversions Question :2 The correct answer is b Read up on fibre optics Question :3 The correct answer is a Read up on anti-static precautions Question :4 The correct answer is b Read up on ARINC 429 and 629 data bus systems Question :5 The correct answer is b See ANO Art 53 para.1. Although JAR Ops states that the CVR must begin when the aircraft is capable of moving under its own power. Question :6 The correct answer is b Read up on ACARS Question :7 The correct answer is c Read up on ARINC 429 and 629 data bus systems (429 uses either BCD or binary) Question :8 The correct answer is c Read up on autopilot Question :9 The correct answer is b Read up on B-RNAV Question :10 The correct answer is b Read up on basic radar theory This is exam number 16. You've been here 1 times. 1. An ARINC 429 Binary Coded Decimal word occupies word bits a) 11 - 28 b) 11 - 29 c) 1 - 8 2. Engine parameters are displayed on a) ECAM b) EHSI c) CDU 3. A flight deck CRT LRU is being replaced. What does the ESDS label indicate? a) Wrist straps should be worn b) Do not touch plug pins or leave them exposed c) Remove power before connecting 4. What systems does the ADC feed? a) Altimeter / FMS / secondary radar

b) Standby altimeter/machmeter c) Cabin pressure controller sensor / machmeter / Altimeter 5. A hexadecimal is a number to base a) 8 b) 2 c) 16 6. An ARINC 429 system uses a a) 16 bit word over a twisted pair of wires b) 32 bit word over a twisted pair of wires c) 20 bit word over a bi-directional bus 7. A thyristor is a device which has a) a positive temperature coefficient b) a negative temperature coefficient c) a temperature coefficient of zero 8. When using a wrist strap, before touching the LRU the resistance should be measured from your skin to the end of the earth probe. This should be a) more than 10 kilohms b) less than 10 kilohms c) less than 1 ohm 9. 1012 converted to decimal is a) 52 b) 510 c) 210 10. Physical variables in quantitative forms, such as voltage or angular rotation of a shaft are a) analogue b) digital c) binary Answers Question :1 The correct answer is b Two versions of ARINC 429. BCD uses 11 - 29, Binary uses 11 - 28. Question :2 The correct answer is a Read up on ECAM/EICAS systems Question :3 The correct answer is b See Pallett's Micro Electronics In Aircraft Systsems or CAAIPs 9-4 para.7.1.3. Question :4 The correct answer is c Read up on Air DAta Computers Question :5 The correct answer is c Read up on hexadecimal numering system Question :6 The correct answer is b Read up on ARINC 429 and 629 data bus systems Question :7 The correct answer is b Read up on thyristos Question :8 The correct answer is a Read up on anti-static precautions Question :9 The correct answer is b Read up on binary to decimal converions Question :10 The correct answer is a Read up on analogue/digital definitions This is exam number 17. You've been here 1 times.

1. Within a 3 bit frequency cascade, division is to a) 8 b) 4 c) 2 2. When is a radio altimeter active? a) Up to 10,000 ft b) Up to 2,500 ft c) Up to 100 ft 3. Which of the following could be a primary cause of HIRF protection failure? a) Unserviceable radio filters b) Broken or missing static wicks c) Corrosion on bonding leads 4. The binary coded decimal number 10011000 expressed as a decimal number is a) 98 b10 b) 152 10 c) 152 2 5. The decimal number 7 expressed as a binary number is a) 111 2 b) 7 2 c) 101 2 6. Convert 011101 binary to octal a) 25 b) 33 c) 35 7. Manufacturers of aircraft can ensure HIRF protection a) by designing specific avionic areas that are shielded against HIRF b) by ensuring all single wires are shielded with metal conduit c) by advising the operator of parts of the aircraft susceptible to degradation due to corrosion, moisture ingress, flexing etc. 8. An ARINC 629 characteristic is a) all LRUs can transmit at the same time b) all LRUs can transmit and receive at the same time c) data can transmit in both directions down the data bus 9. In an ARINC 429 word string, bits 1 - 8 represent a) the source of the message b) the monitored parameter c) the destination LRU 10. What limits the number of ARINC 429 receivers on a bus a) The speed and size b) The parallel input impedance c) The weight Answers Question :1 The correct answer is a Read up on counters Question :2 The correct answer is b Read up on radio altimeters and ILS Question :3

The correct answer is a The exact definition of HIRF does not include electrostatc discharge (ESD). But only interference from outside sources. Understanding HIRF By Gerald L. Fuller Question :4 The correct answer is a Read up on BCD to decimal conversions (BCD is not the same a s binary) Question :5 The correct answer is a Read up on decimal to binary conversions Question :6 The correct answer is c Read up on binary to octal conversions Question :7 The correct answer is a Understanding HIRF By Gerald L. Fuller Question :8 The correct answer is c Read up on ARINC 429 and 629 data bus systems Question :9 The correct answer is b Read up on ARINC 429 and 629 data bus systems Question :10 The correct answer is b Read up on ARINC 429 and 629 data bus systems This is exam number 18. You've been here 1 times. 1. The 'fan-in' in a gate is the a) number of outputs from a gate b) number of inputs to a gate c) number of inputs and outputs of a gate 2. Very Large Scale Integrated (VLSI) means the number of gates in a single IC is a) up to 1000 b) up to 10,000 c) over 10,000 3. The advantage of DRAM over SRAM is a) they operate slower b) has a larger storage capacity per chip area c) are cheaper to manufacture 4. A BYTE is usually a) a 12 bit word b) an 8 bit word c) a six bit word 5. Data is transferred on the MIL-STD-1553B by a) bi-polar return to zero b) manchester bi-phase c) non return to zero 6. The fibre optic cable can be identified on aircraft by its jacket colour which is a) purple b) red c) yellow 7. For a fibre optic cable connector that is not regularly disconnected you would use the a) ceramic lens type b) ball lens type c) butt type 8. The timebase in a CRT consists of a) an amplifier and an oscillator b) an oscillator only

c) an amplifier only 9. HIRF protection of LRUs is provided by a) built in filters and overvoltage circuits b) internally shielded cables c) built in filters only 10. An EADI display of flight director commands are coloured a) cyan b) red c) magenta Answers Question :1 The correct answer is b Read up on logic gate systems Question :2 The correct answer is c Read up on logic gate systems Question :3 The correct answer is c Read up on memory (RAM) types Question :4 The correct answer is b Read up on computer terminology Question :5 The correct answer is b Read up on MIL-STD-1553 data bus system Question :6 The correct answer is a Read up on fibre optics Question :7 The correct answer is c Read up on fibre optics Question :8 The correct answer is a Read up on CRTs Question :9 The correct answer is a Understanding HIRF By Gerald L. Fuller Question :10 The correct answer is c Aircraft instruments and integrated systems,(pallet) page 302 fig 12.5 eadi flight director command bars are magenta This is exam number 19. You've been here 1 times. 1. Which systems does a modern ADC give information to? a) Flight control computer, Air Data Instrument, Engine systems b) EFIS c) EICAS 2. Binary Number: 110010 a) 80 b) 50 c) 34 3. How are engine indications sent to the FDR? a) Via ARINC 573 b) Via ARINC 629 c) Source isolated 4. What is this truth table?

A B A.B 0 0 0 1 0 0 0 1 0 1 1 1

a) AND gate b) NOR gate

c) NOT gate 5. Where do the outputs from a DADC go? a) EADI b) EHSI c) IRMP: Inertial Reference Mode Panel 6. During an EFIS screen fit a) use bonding strap b) dont touch terminals c) no tooling is required 7. To stop earth loops forming, you would a) leave both ends of the cable screen open circuit b) earth both ends of the cable screen c) earth only one end of the cable screen 8. How many satellite signals are required to achieve precise 3D positioning? a) 4 b) 5 c) 6 9. Binary addition of 1101 + 101101 is a) 58 b) 61 c) 70 10. What system uses base 8? a) ARINC 429, in dataword labels only b) ARINC 629 c) ARINC 573 Answers Question :1 The correct answer is a Read up on Air Data Computer Question :2 The correct answer is b Read up on binary to decimal conversion Question :3 The correct answer is a Read up on Flight Data Recorder Question :4 The correct answer is a Read up on logic gates Question :5 The correct answer is c Read up on Digital AIr Data Computer (IRMP is the control for the Inertial Referencing Unit) Question :6 The correct answer is b Microelectronics in Aircraft Systems - Pallet. pg 219 Question :7 The correct answer is c Read up on anti-static precautions Question :8 The correct answer is a Read up on satallite navigation (or GPS) Question :9 The correct answer is a Read up on binary addition and binary to decimal conversions Question :10 The correct answer is a Read up on ARINC 429 data bus word format This is exam number 20. You've been here 1 times. 1. What maintenance problems are associated fibre optics? a) Corrosion

b) Earthing faults c) Kinking and contamination of connectors 2. Who can sign for a software update? a) Design organization or the aircraft manufacturer b) Engineer c) Chief pilot 3. What sort of gate is this?

a) Or gate b) NOR gate c) NOT gate 4. What creates the raster effect on a CRT? a) Sawtooth frequency b) Sinusoidal frequency c) Trapezoidal 5. Common fibre optic use is a) modulating intensity on direct read b) modulating frequency on direct read c) HIRF 6. An aircraft may have been HIRF affected. a) A static wick check is required b) A bonding load check is required c) Test all radio frequencies for interference 7. The binary number 11010111 is expressed as a decimal is: a) 215 b) 107 c) 53 8. The octal number 1001 expressed as a decimal is: a) 513 b) 613 c) 713 9. With a relative humidity of 10% to 20%, if you walked over a carpet what electrostatic voltage value would you expect to see? a) 6,000 volts b) 12,000 volts c) 35,000 volts 10. Before fitting a Printed Circuit Board you should check the a) resistance between skin and strap end plug is less than 10 megohms b) resistance between skin and strap end plug is more than 1 megohms c) resistance between strap and strap end plug is less than 1 megohms Answers Question :1 The correct answer is c Read up on fibre optics Question :2

The correct answer is b AWN 43 Question :3 The correct answer is b Read up on logic gates Question :4 The correct answer is a Read up on Cathode Ray Tubes Question :5 The correct answer is b Read up on fibre optics Question :6 The correct answer is a Read up on HIRF protection Question :7 The correct answer is a Read up on binary to decimal converion Question :8 The correct answer is a Read up on octal to decimal conversion Question :9 The correct answer is c Read up on static electricity Question :10 The correct answer is c CAAIP Leaflet 9-4 5.3.1 This is exam number 21. You've been here 1 times. 1. A fibre optic data bus a) can only transmit 1 message at a time b) can transmit several messages simultaneously c) is only used for non essential messages 2. The minimum requirement for an aeroplane CVR is a) from power on b) from engine start c) from beginning of take off roll 3. On an ARINC 629 data bus, the maximum amount of current-mode couplers per data bus is a) 46 b) 120 c) 64 4. To connect a LRU to the data bus a) a current mode coupler, serial interface module and terminal controller is required b) current mode coupler, terminal controller and a production break is required c) a terminal controller and interface module only is required 5. A current-mode coupler contains an E-Core assembly. The purpose of the E-Core is to a) couple the signal to the data bus b) provide effective screening of the signal through the current-mode coupler c) enable easy access for monitoring of the signal 6. The ARINC 429 low rate of transmission is a) 12-14 Kbits/second with high of 100 kBits/second b) 12-14 Mbits/second with high of 100 Mbits/secon c) 100 kbits/second with high of 12-14 Mbits/second 7. A D to A converter is required to produce an output range of 0 to 10V. This can be achieved by a) a non inverting op amp connected in series with output b) an inverting op amp connected in series with output c) a differentiator with a 100 Kilohm feedback resistor

8. A D to A converter would use a precision amplifier to a) ensure that the output voltages remain accurate b) ensure that the input voltage remains accurate c) compensate for the variation of the feedback resistor with temperature 9. A given transducer provides a voltage which corresponds to true heading. This voltage can be converted to 'bits' by using a a) commutator b) digital to analogue converter c) analogue to digital converter 10. The output of a NOT gate is logic 1. The input is a) logic 1 b) logic 0 c) both logic 1 Answers Question :1 The correct answer is b Read up on fibre optics Question :2 The correct answer is b JAR OPS Para 1.700 (c) OR answer c by CAP 393 Section I Para 53 Question :3 The correct answer is b 120 LRUs maximum (but the B777 uses 46) Question :4 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :5 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :6 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :7 The correct answer is b Read up on DACs and ADCs Question :8 The correct answer is a Read up on DACs and ADCs Question :9 The correct answer is c Read up on DACs and ADCs Question :10 The correct answer is b Read up on logic gates This is exam number 22. You've been here 1 times. 1. An ARINC 629 bus cable is a twisted pair of wires with a) a 130 ohm resistor at one end b) a 230 ohm resistor at one end c) a 130 ohm resistor at both ends 2. An ARINC 629 stub cable a) connects bi-directional data between the LRU and current mode coupler b) connects single directional data between the LRU and current mode coupler c) connects bi-directional data between two LRUs 3. Care must be taken when installing ARINC 629 cables into bus panels, damage to cables can cause a) arcing of high voltage signals b) standing waves. c) corrosion of the conductor

4. An aircraft data bus system a) cannot use both ARINC 629 and ARINC 429 data buses. b) can use both ARINC 629 and ARINC 429 as they are compatible. c) can use both systems, ARINC 629 and ARINC 429 via system card files and signal gateways 5. An Inertial Navigation System (INS/IRS) computes distance from acceleration by a) a simple integration b) a differentiation followed by an integration c) two successive integrations 6. Before the aircraft is moved from the loading pier the pilot must a) insert the latitude and longitude of the pier into the IRS b) set the altitude to be fed into the INS c) insert the longitude and latitude of the first waypoint into the INS 7. A 12 bit 16 Channel encoder will use a multiplexer with a) 2 wire series address line b) 3 bit parallel address line c) 4 bit parallel address line 8. An A to D converter uses successive approximation to a) increase resolution b) increase speed c) increase accuracy 9. An R-2R D to A converter uses a) two values of resistors whose precision is not important b) two values of precision resistors c) resistors whose values are logarithmic 10. A fiber optic cable to LRU connector should be connected a) using torque-loaded pliers b) hand tight only c) very carefully to ensure alignment and reduce light loss Answers Question :1 The correct answer is c Read up on ARINC 429 and 629 data bus systems Question :2 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :3 The correct answer is c Read up on ARINC 429 and 629 data bus systems Question :4 The correct answer is c Read up on ARINC 429 and 629 data bus systems Question :5 The correct answer is c Read up on acceleration - velocity - distance computations Question :6 The correct answer is a Read up on Inertial Reference Systems Question :7 The correct answer is a Read up on multiplexing Question :8 The correct answer is b Read up on ADCs and DACs Question :9 The correct answer is b Read up on ADCs and DACs Question :10 The correct answer is c Read up on fibre optics

This is exam number 23. You've been here 1 times. 1. An IRS has a) accelerometers fixed to the airframe and gyros on a stable platform b) accelerometers and gyros fixed to a the airframe c) accelerometers on a stable platform and gyros fixed to the airframe 2. An IRS system requires data for wind computation from a) central Air Data Computer b) satellites c) Doppler System 3. The FMS carries out a Rho/Theta navigation function, the purpose of this is to a) update the IRS system with an accurate position fix of latitude and longitude b) to update the EMS with the new lateral flight profile for the flight plan c) to update the VOR and DME systems with an accurate position fix 4. The FMS is updated a) by the aircrew by reference to the Tech Log b) automatically by update data from the ACARS c) by an aircraft engineer updates the system either by a magnetic tape or floppy disc 5. Pitch Control of a fly by wire system is achieved by a) elevators only b) stabilizer and elevator c) stabilizer only 6. In a fly by wire system, if the pilot control input is derived from a side stick controller: a) control surface feedback is fed to the side stick b) there is no control surface feedback to the side stick c) there will be only control surface feedback to the side stick after a computer failure 7. In memory using multivibrators, when power is switched off the datawill a) still be available on power up b) be lost c) automatically be downloaded 8. The resistance of the wrist strap used as part of anti static precautions should be a) 0 - 200 ohm b) 250 kilohm - 1.5 megohm c) 20 megohm - 200 megohm 9. What is the function of a status register in a microprocessor? a) To indicate the status of the processor b) In the ALU, to store the position of the program during an interrupt c) To synchronize the clock pulse 10. What is the advantage of EPROM over fusible link? a) Cheaper to produce b) Can be re-programmed c) Does not need refreshing

Answers Question :1 The correct answer is b Read up on IRS Question :2 The correct answer is a Read up on IRS Question :3 The correct answer is a Read up on FMS - IRS update function Question :4 The correct answer is c Read up on FMS database updating Question :5 The correct answer is b Read up on fly-by-wire Question :6 The correct answer is b Read up on fly-by-wire Question :7 The correct answer is b Read up on RAM types Question :8 The correct answer is b CAAIPs Leaflet 9-4 5.3.1 Question :9 The correct answer is a

a) A = 0, B = 0 b) A = 1, B = 1 c) A = 1, B = 0 8. Registers are used in digital computers to a) store bits of information in a permanent memory b) store a limited amount of information on a temporary basis c) keep a count of operations completed 9. What is 0111000012 in Octal? a) 281 10 b) 225 8 c) 341 8 10. ARINC 629 is used for a) normal flight b) emergency only c) a backup to ARINC 429 Answers Question :1 The correct answer is c Jeppesen Avionics Fundamentals Page 137 Question :2 The correct answer is a Read up on IRS Question :3 The correct answer is b Read up on FMS databases Question :4 The correct answer is a Read up on fly by wire Question :5 The correct answer is b Read up on DACs and CADs Question :6 The correct answer is c Read up on logic systems Question :7 The correct answer is b Read up on logic gates Question :8 The correct answer is b Read up on CPU architecture Question :9 The correct answer is c Read up on binary to octal conversions Question :10 The correct answer is a Read up on the ARINC 429 and 629 data bus system This is exam number 25. You've been here 1 times. 1. Testing of HIRF on aircraft systems is done a) by periodically listening for interference on all systems b) at and during production and testing (initial certification) c) only after a report of radio interference 2. How are earth loops prevented from forming? a) Ground only one end of the cable screen b) Ground both ends of the cable screen c) Ground neither end of the cable screen 3. When carrying out a bonding check on a surface protected by anodic film a) the anodic film should be removed locally to ensure a good contact b) the film is conductive so no preparations are required c) add a bonding factor to the result of the test to account for the resistance of the anodic film

4. The accelerometer output in an INS/IRS is a) integrated twice to give velocity b) integrated twice to give distance c) integrated once to give distance 5. An INS/IRS Battery Unit provides a) standby power when airborne and on the ground b) standby power only whilst in flight c) standby power only on the ground 6. The FMS Navigation Data Base must be updated a) once a month b) every 28 days c) before each flight to establish the flight plan 7. If a fly by wire actuator loses hydraulic power the control surface will a) automatically move back to the neutral position b) remain rigid in the failure position c) remain in the failure position but may move due to aerodynamic pressure 8. The output of an OR gate having two inputs A and B is logic 0. The two inputs will have the logic states of a) A = 0, B = 0 b) A = 1, B = 0 c) A = 0, B = 1 9. When clamping cable looms containing co-axial cables a) avoid distortion to the co-axial cable to maintain the dielectric constant b) distortion of the outer sheath is allowed providing the inner cable is not affected c) the clamps must be no more than 1 metre apart 10. When incorporating an aerial cable it must be a) in the centre of the other wires b) outside the other wires for easy access c) positioned separately from the loom Answers Question :1 The correct answer is b Understanding HIRF By Gerald L. Fuller Question :2 The correct answer is a Read up on HIRF protection Question :3 The correct answer is a Read up on electrical testing Question :4 The correct answer is b Read up on acceleration - velocity - distance computations Question :5 The correct answer is a Aircraft Instruments and Integrated Systems. Pallett Page 247 & 248 Question :6 The correct answer is b Read up on FMS databases Question :7 The correct answer is c Read up on fly by wire systems Question :8 The correct answer is a Read up logic gates Question :9 The correct answer is a Read up on cable installations Question :10 The correct answer is c Read up on cable installations

This is exam number 26. You've been here 1 times. 1. Some of the advantages of fiber optic cable over copper cable are a) non conductive, easy to manufacture and assemble, higher bandwidth b) smaller size and weight, non conductive, more rugged, higher security c) non conductive, higher bandwidth, higher security, smaller size and weight 2. When carrying out airframe bonding checks as part of a program of HIRF prevention the airframe bonding resistance should be less than a) 50 milliohms b) 100 milliohms c) 1 ohm 3. LCD screens are driven by a) AC voltage b) variable current DC voltage c) fixed current DC voltage 4. IRS alignment a) takes up to 10 minutes and the present position can be entered at any time during alignment b) takes up to 10 minutes and present position must be entered before alignment. c) takes up to 10 minutes and the previous flight shut down present position is used for the alignment 5. A fault light appears on the IRS Mode Selector Unit during the alignment sequence. The correct action is a) immediately switch off and select the standby system. b) select HDG/STS on the Inertial System Display Unit (ISDU), observe the action code in the right alpha/numeric display c) refer to the warning display on the EICAS/ECAM system. 6. EFlS systems have two control panels, their purpose is a) to provide display control by one control panel whilst the other provides a standby b) one for the EADI display and one for the EHSI display c) one to control the type of EFlS display and the other to select the source of the information being displayed 7. A FMS has a total of how many Data Bases a) 1 b) 2 c) 4 8. Fly by wire High Speed protection is a) to prevent high speed stall b) to increase the pitch angle as speed increases c) to prevent tuck under 9. In a single mode fibre optic cable a) several waves travel down the cable b) the diameter of the cable is dependent on the wavelength of the light used* c) the distortion of the signal occurs is dependent on the length of cable

10. A semiconductor which emits photons and releases electrons when stimulated by photons is called a) an LED b) a photodiode c) a laser diode Answers Question :1 The correct answer is c Read up on fibre optics Question :2 The correct answer is a Read up on HIRF protection Question :3 The correct answer is a See discussion in Forum Module 5 for details Question :4 The correct answer is a Read up on IRS Question :5 The correct answer is b Read up on IRS Question :6 The correct answer is c Read up on EFIS Question :7 The correct answer is b Read up on FMS databases (navigation and performance databases) Question :8 The correct answer is c Read up on fly by wire Question :9 The correct answer is b Read up on fibre optics Question :10 The correct answer is c Read up on laser diodes (Light Amplification by Stimulated Emission of Radiation) This is exam number 27. You've been here 1 times. 1. An IRS Laser gyro provides a) detection of the rate of movement about an aircraft axis b) detection of the earths rotation to establish true north c) detection of the earths gravitational force to establish true north 2. A Liquid Crystal Display (LCD) has the advantage over a CRT because a) it displays more colours b) it requires less servicing c) it requires no cooling 3. The left and right cockpit displays a) are supplied from separate Symbol Generators at all times b) are supplied from the same Symbol Generator c) will only be supplied from the same symbol generator when all other symbol generators have failed 4. A single failure of a fly by wire control surface computer will a) cause the system to revert to an alternate law of operation b) cause the system to revert to a direct law of operation c) not have any operational effect on the system 5. An encoder changes a) analogue to digital b) digital to analogue c) data from one format to another 6. An encoder using Grey code a) changes analogue to digital b) changes analogue to binary

c) changes digital to analogue 7. What is the Low Speed transmission rate for ARINC 429? a) 12 14.5 kbits / second b) 100 kbits / second c) 120 kbits / second 8. What is this symbol:

a) Exclusive AND gate b) Exclusive OR gate c) Exclusive NOR gate 9. What Logic Gate does this switch circuit indicate?

a) AND gate b) OR gate c) NOR gate 10. What is the effect of a level 1 software failure? a) Significant reduction in safety margins b) Large reduction in safety margins c) Loss of aircraft and / or fatalities Answers Question :1 The correct answer is a Jeppesen Avionics Fundamentals Page 137 Question :2 The correct answer is c Read up on LCDs and CRTs Question :3 The correct answer is c Read up on EFIS Question :4 The correct answer is c Read up on fly by wire systems Question :5 The correct answer is c Read up on encoders and decoders Question :6 The correct answer is a Read up on altitude encoders and grey code Question :7 The correct answer is a Read up on ARINC 429 and 629 data bus systems Question :8 The correct answer is b Read up on logic gates Question :9 The correct answer is b Read up on logic gates Question :10 The correct answer is c Read up on software management This is exam number 28. You've been here 1 times.

1. Ribbon cables affected by mutual impedance and current loop leakage are protected by a) earthing each conductor b) earthing each alternate conductor c) wrapping the complete ribbon in an earthed shield 2. What is the definition of baud rate? a) 1 bit per second b) 1 byte per second c) 1 word per second 3. An RS flip-flop with Q at 1 is said to be a) reset b) set c) zero 4. What is the Boolean Algebra for the XOR Circuit below?

5. What does the logic circuit below represent?

a) Half adder circuit b) Full Adder Circuit c) Multi-bit adder 6. The release of a photon by another photon is an example of a) a zener diode b) an LED c) a photo diode

7. When a JK flip flop is used as a memory device, what type of memory would it be? a) non-volatile b) read-only c) volatile 8. Once an ARINC 629 LRU has transmitted a message it will wait how long before transmitting again? a) Until the end of the synchronization gap. b) Until the end of the transmit interval c) Until the start of the terminal gap 9. How is the word label 206 written in ARINC 429? a) Decimal 206 b) Binary 11000110 c) Octal 01100001 10. What is ARINC 561 used for? a) Flight Data Recorder systems b) Fly by Wire systems c) Inertial Navigation Systems Answers Question :1 The correct answer is b Read up on HIRF protection Question :2 The correct answer is a Read up on computer terminology Question :3 The correct answer is b Read up on flip-flops / vibrators Question :4 The correct answer is b Read up on boolean algebra Question :5 The correct answer is b Read up on adders Question :6 The correct answer is b Reead up on LED operation Question :7 The correct answer is c Read up on memory types Question :8 The correct answer is b Read up on ARINC 629 data word format Question :9 The correct answer is c Label is Octal - MSB to right - so yes, it is backwards Question :10 The correct answer is c Read up on the ARINC data bus systems This is exam number 29. You've been here 1 times. 1. What are the outputs from digital clocks used for? a) VOR, ILS and DME b) Flight data acquisition unit, Flight management computer and Voice recorder c) Weather radar, TCAS and ACARS 2. What does a fibre optic star connection do? a) Provides direct point-to-point services to units on dedicated lines emanating from the central hub b) Provides a continuous loop of fibre interconnecting all nodes c) Shares a common bandwidth of a common cable

3. What is the purpose of the ALU? a) To convert serial into parallel data b) To store data being used by the CPU c) The part of the CPU unit where arithmetic & logic operations are carried out 4. Which logic gate has both inputs high to get an output? a) NAND gate b) XOR gate c) AND gate 5. Which would have the least components? a) ALU b) CPU c) LSI 6. How many address lines would be needed for an 8 line MUX? a) 4 b) 3 c) 2 7. In a MUX, how is parallel converted to serial? a) By way of a shift register b) By way of a demultiplexer c) By way of an encoder 8. If a magnetic field is parallel to the X plates in a CRT, which way will the beam move? a) Diagonally b) Vertically c) Horizontally 9. What would you expect to see displayed on an EADI display? a) Flight director command bars, slip indicator, rate to altitude & autoland b) Compass heading, selected heading and VOR c) Course information, weather radar, way point alert and bearing pointers 10. The binary number 10101000111001012 in hexadecimal is: a) 22BC 16 b) A8E5 16 c) FFFF 16 Answers Question :1 The correct answer is b Only these require real time reference Question :2 The correct answer is a Read up on fibre optics Question :3 The correct answer is c Aircraft Electricity and Electronics, Eismin, 5th Edition Page 146 Question :4 The correct answer is c Read up on logic gates Question :5 The correct answer is a Read up on CPU components Question :6 The correct answer is b Read up on multiplexing / demultiplexing Question :7 The correct answer is a Read up on shift registers

Question :8 The correct answer is c Read up on CRTs Question :9 The correct answer is a Read up on EFIS Question :10 The correct answer is b Read up on binary to hex conversions This is exam number 30. You've been here 1 times. 1. A fibreoptic lens type coupling with lens and integral LED compared to an end-fire coupling is a) more efficient b) less efficient c) equally efficient 2. An analogue to digital converter is as accurate as a) the sampling rate b) the frequency c) the amplitude 3. A digital to analogue converter that requires the output to range between 0v and -10v would have a) a non-inverting amplifier in parallel with the output line b) an inverting amplifier in series with the output line c) a non-inverting amplifier in line with the output with a resistor to ground 4. An LED display is a) red and green b) monochrome only c) high definition 5. An EFIS ADI display will show along with pitch and roll a) flight director bars, autoland, compass rose, altitude b) flight director bars, autoland, altitude, range to altitude, decision height c) decision height, autoland, rad alt , altitude 6. A full operation system BITE check will carry out a internal system test that ensures the system meets design requirements and is operational a) but will not move the controls b) as well as checking full system and will move the controls to their stops c) as well as checking full system but will not move the controls to their stops 7. If on a flight deck EFIS system all the displays were missing one bit of information this is most likely to be a) the symbol generator and display b) the input sensor bus and display controller c) the display controller and symbol generator 8. A arinc data word is bits 11-29, if bits 11-18 are patched which of the following would be the LSB bit a) 19 b) 29 c) 21 9. What is a band? a) A block of data

b) A bit of data c) A byte of data 10. Passive sensors in fibre optics a) require power for the processing signal before they send them down the fibre optic b) require no power and they do not process signals c) process the signal but do not require power Answers Question :1 The correct answer is a Question :2 The correct answer is a Question :3 The correct answer is b Question :4 The correct answer is b Question :5 The correct answer is c Question :6 The correct answer is c Digital Avionic Systems - Cary Spitzer. Page 109, Arinc report 604 guidance for design and use of built in test equipment states... 'BITE should excercise the hardware sufficiently to determine if it meets the performance requirements but should not drive it against mechanical stops.' Question :7 The correct answer is b Question :8 The correct answer is a Question :9 The correct answer is b Question :10 The correct answer is c This is exam number 31. You've been here 1 times. 1. An LCD display uses what type of power supply? a) Continuous AC b) Variable level DC voltage c) DC voltage 2. Fibre optic data bus links are a) bi-directional b) one way data buses c) simplex 3. 0011011000101001 when transferred to computer language this information can be a representation of a) binary, octal or decimal numbers b) hex, octal and binary numbers c) hex, octal and decimal numbers 4. In a bi-stable memory circuit a) the memory is lost as soon as power is removed b) the memory is retained indefinably c) the memory needs to be refreshed constantly, even when power is on 5. In an analogue to digital converter, the input voltage a) stays on constantly b) is switched by the digital input c) is intermittent

6. In an RS flip flop output is one. This means it is a) set b) reset c) intermediate 7. ARINC 629 utilizes a) full duplex b) half duplex c) simplex 8. Optical fibre losses are due to a) absorption only b) absorption, scattering and reflection c) radiation, absorption and reflection 9. The cone of acceptance is measured between a) longitudinal axis of the core and the outer angle b) the two outer angles c) the diameter of the core 10. An R-2R Converter has values or resistance a) whose precision are accurate b) whose relative precision are accurate c) whose precision are not accurate Answers Question :1 The correct answer is a See discussion in Forum Module 5 for details Question :2 The correct answer is a Question :3 The correct answer is b Question :4 The correct answer is a Question :5 The correct answer is a Question :6 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 143 Question :7 The correct answer is b Question :8 The correct answer is b Introduction to Fiber Optics John Crisp Page 50 Question :9 The correct answer is a Introduction to Fiber Optics John Crisp Page 29 Question :10 The correct answer is b This is exam number 32. You've been here 1 times. 1. An ALU is an example of a) LSI b) SSI c) MSI 2. What does 1 represent in an analogue system? a) Switches closed, magnetised b) Switches open, unmagnetised c) High frequency

3. A centralised monitoring computer system is used a) to test system during flight and for BITE test of systems on the ground using a carry on control unit b) to test systems in flight and on the ground using a centralised on board control unit c) testing systems on the ground only 4. A signal in an ARINC 629 system uses a) a pair of wires per transmitter unit b) a twisted pair of wires or fibre optics c) a single wire 5. A beam deflection on EFIS displays are a) electromagnetism b) electrostatic c) solid state 6. A nand and nor to become a not gate have a) inputs connected together b) inputs inverted c) outputs inverted 7. An in-series ARINC 429 system transmits using a) wave dividing multiplexing b) time dividing multiplexing c) encoder 8. Fibre optic cables use a) reflective outer shell b) refractive outer shell c) reflective inner shell 9. A sinusoidal circular time constant produces what output? a) 90 degrees out of phase b) 180 degrees out of phase c) In phase 10. A terminal controller a) transmits only when addressed b) is repetitive transmitting c) will transmit only once during each transmit interval Answers Question :1 The correct answer is a Question :2 The correct answer is a Question :3 The correct answer is b Aircraft Electricity and Electronics Eismin 5th Edition Page 270 Question :4 The correct answer is b Aircraft Electricity and Electronics Eismin 5th Edition Page 148 Question :5 The correct answer is a Aircraft Instruments and Integrated Systems EHJ Pallett Page 297 Question :6 The correct answer is a Question :7 The correct answer is b Question :8

The correct answer is b The outer cladding is glass, so it is refractive (but less so than the core). Cladding causes Total Internal Reflection (TIR), so question can be interpreted in two ways. Question :9 The correct answer is a Question :10 The correct answer is c This is exam number 33. You've been here 1 times. 1. What is the advantage of series over parallel message sending? a) Quicker b) More information sent c) Only one pair of conductors 2. The number of LRUs which transmit/receive on ARINC-429 is dependent upon a) size of S.D.I b) speed of transmission & size of aircraft systems c) parallel input impedance 3. In fibre optic cable, signals are separated by a) active optic filter b) passive optic filter c) low pass filter 4. In an EFIS display, the lines, Scales, Indicator and Synoptic are generated by a) synoptic scan b) stroke scan c) raster scan 5. Speed of computer process information depends upon a) the size of the programme b) the time period to access the memory c) the external inputs to the system 6. A typical example of a mass storage memory device which "write once" and "read many" is a) a CD Rom b) an IC c) a magnetic tape 7. When handling PCB's labelled ESDS, what precaution are taken? a) Isolate electrical power before installing on Aircraft b) First earth with aircraft then to it c) Do not touch its pins as copper contamination can occur 8. A computer consist of at least the C.P.U and a) memory and input & output port b) register section, ALU, timing and control section c) memory, ALU, input & output port 9. Electromagnetic compatibility is achieved by a) shielding, screening, earthing, bonding and interference filters b) enclosing the system with same frequency and strength of which screening is done c) coating in a conductive paint 10. The supply to an LCD is

a) AC b) current restricted DC c) voltage restricted DC Answers Question :1 The correct answer is c Aircraft Electricity and Electronics Eismin 5th Edition Page 146 Question :2 The correct answer is c Question :3 The correct answer is a Question :4 The correct answer is b 757 MM 34-22-00 page 40 (p) and 737 MM 34-22-00 page 47, 4(b) Question :5 The correct answer is b Question :6 The correct answer is a Question :7 The correct answer is a Microelectronics in Aircraft Systems. Pallett. Page 219 Question :8 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 144 Question :9 The correct answer is a Question :10 The correct answer is a See discussion in FORUM Module 5 This is exam number 34. You've been here 1 times. 1. The method of producing (white) lines for aircraft symbols, V/S scale etc. on an EADI is by a) stroke scan b) raster scan c) trapezoidal input 2. In modern aircraft, the output from the clock is used a) to synchronise the signals on the control bus b) give GMT details to the flight recorder and other systems c) to provide a clock pulse for CRT 3. Audio sounds recorded digitally a) are not as accurate due to clipping and input errors b) are superior quality and "data preservation" c) are narrow bandwidth 4. When carrying out HIRF maintenance on aircraft, the max resistance is a) 1 milliohm b) 1 ohm c) 0.05 ohms 5. A computer message 3B4 is a) binary b) octal c) hexadecimal 6. One of the ARINC 429 formats is a) hexadecimal b) BCD c) octal 7. When does voice data recording commence?

a) On engine start b) From aircraft take off run c) After take off when airborne 8. What is 54 octal in hexadecimal a) 2C b) 4F c) 2F 9. A heading reference of 320 degrees in a word label format would be written as a) 101010001 b) 11010000 c) 01000111 10. Within an EFIS display system, all displays have 1 bit of information missing. What would be the most probable cause? a) Symbol generator and sensor input b) Display controller and sensor input bus c) Display controller and symbol generator Answers Question :1 The correct answer is a MM 737-300/400/500, 34-22-00 page 47 4b or MM 757 34-22-00 page 40 (p). 'The special symbols, characters, letters, vectors and arcs are displayed using the stroke method. The EADI sky/ground ball or EHSI weather radar are displayed using the raster method Question :2 The correct answer is b Question :3 The correct answer is b Question :4 The correct answer is c Question :5 The correct answer is c Question :6 The correct answer is b http://www.condoreng.com ARINC 429 tutorial Question :7 The correct answer is b CAP 393 Section I Para 53, OR answer c by JAR OPS Para 1.700 (c) Question :8 The correct answer is a Question :9 The correct answer is b Question :10 The correct answer is b This is exam number 35. You've been here 1 times. 1. A computer using RAM would utilise a) a compact disc b) an integrated circuit (chip) c) magnetic tape 2. With a j-k flip flop which is the output set a) q = 1 b) q = 0 c) either 3. If the glideslope pointer is below the centre mark the aircraft is a) on the glideslope

b) below the glideslope c) above the glideslope 4. 2D in decimal is a) 45 b) 43 c) 41 5. The operational data base of the FMS may have to be modified in flight a) by the pilot b) automatically by the DADC c) It cannot be modified in flight 6. An LED will emit light when a) it is forward biased b) it is reverse biased c) either forward or reverse biased if a sufficient level of ac voltage is applied 7. On an EFIS system the weather radar is displayed on a) the EADI b) the EHSI c) the FMC CDU 8. CADC outputs are a) altitude, vertical speed, IAS, mach no b) altitude ,vertical speed, angle of attack, TAT, SAT c) altitude, vertical speed, TAS, CAS, mach no, SAT, TAT 9. Data is converted from serial to parallel and parallel to serial by a) a parallel register b) a shift register c) a synchronous counter 10. A group of bits transmitted at the same time is a) a clock signal b) parallel data c) serial data Answers Question :1 The correct answer is b Aircraft Electricity and Electronics Eismin 5th Edition Page 146 Question :2 The correct answer is a Question :3 The correct answer is c Question :4 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 132 Question :5 The correct answer is c Question :6 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 121 Question :7 The correct answer is b Aircraft Instruments and Integrated Systems EHJ Pallett Page 305 Question :8 The correct answer is c Aircraft Instruments and Integrated Systems Pallett Page 162. Question :9 The correct answer is b Question :10 The correct answer is b

This is exam number 36. You've been here 1 times. 1. A typical characteristic of a CMOS is a) low power dissipation b) high voltage handling c) high power dissipation 2. If one EICAS CRT fails a) the remaining CRT will display primary EICAS data b) the FMS CDU will display the failed CRT data c) the standby CRT will automatically take over 3. 84 decimal in hexadecimal is a) 54 b) f4 c) 5f 4. EADI displays a) pitch and roll attitudes b) heading and weather radar c) pitch, roll and waypoints 5. On an EHSI in weather radar mode, a severe storm would be shown as a) orange areas with black or yellow surrounds b) red areas with black surrounds c) blue areas with white background 6. Variations in light on EFIS displays are compensated for by a) integrated light dependant resistors in the display compensating for each display individual b) An external light dependant resistor mounted on the flight deck compensating for all displays in a parallel-parallel format c) manual adjustment by flight crew on EFIS controller 7. The input bus into a central processor unit is a a) one way bus b) bi directional bus c) two way bus 8. A method used in modern aircraft for reporting in flight faults to an engineering and monitoring ground station is a) TCAS II b) ACARS c) TAWS 9. A CRT display has the advantage over an LCD display by a) brighter clearer output b) more energy efficient c) large viewing angle 10. Most fibre optic connectors are designed so a) the receptacle has to torque to a designated torque to ensure correct alignment b) the connectors can not be over tightened c) the connector can not be replaced on the aircraft Answers Question :1 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 140

Question :2 The correct answer is a Question :3 The correct answer is a Aircraft Electricity and Electronics Eismin 5th Edition Page 132 Question :4 The correct answer is a Question :5 The correct answer is b Question :6 The correct answer is a Question :7 The correct answer is a Question :8 The correct answer is b Aircraft Electricity and Electronics Eismin 5th Edition Page 299 Question :9 The correct answer is c Question :10 The correct answer is b This is exam number 37. You've been here 1 times. 1. The self test function on an EFIS system can be tested a) in the air only b) on the ground only c) in the air and on the ground 2. Each of the symbol generator outputs in an EFIS system can be a) displayed of each individual display b) only no. 2 can be displayed on the no.1 c) can not be interchanged 3. An AND gate with inverted inputs and an inverted output is equivalent to a) an AND gate b) an OR gate c) a NOR gate 4. Logic gates internal operating mechanisms are produced from a) thin film resistors b) transistors c) diodes 5. To display a circle on a CRT you use a) 2 sine waves 180 degrees out of phase b) 2 sine waves 90 degrees out of phase c) 2 square wave 90 degrees out of phase 6. The light source used in fibre optics is a) higher bandwidth than visible light b) lower bandwidth than visible light c) visible light 7. When the power is removed from a bi-stable memory device, it's memory will a) be lost indefinitely b) be saved indefinitely c) downloaded to memory 8. BITE tests are inhibited for ground use during a) take-off b) gear retraction c) forward motion

9. Software changes come under the responsibility of a) the national aviation authority b) the aircraft constructor c) the engineer 10. A multiplexer a) takes many signals in and converts it to a serial transmission output b) takes one signal in and converts it to a parallel transmission output c) takes many signals in and puts these in a parallel transmission on the output Answers Question :1 The correct answer is b Question :2 The correct answer is a Question :3 The correct answer is b Question :4 The correct answer is b Question :5 The correct answer is b Question :6 The correct answer is b Introduction to Fiber Optics J Crisp Page 18/19 Question :7 The correct answer is a Question :8 The correct answer is a Question :9 The correct answer is b AWN 45 Question :10 The correct answer is a This is exam number 38. You've been here 1 times. 1. The CPU consists of a) register and arithmetic logic unit only b) ALU, timing and control section, register c) register, timing and control section only 2. The ARINC 429 system uses the following system to transfer data a) non return to zero b) harvard bi phase c) bi-directional return to zero 3. Which of the following ARINCs are bidirectional? a) 429 b) 629 c) 573 4. Data is transferred on the MIL-STD-1553B by using a) bipolar return to zero b) manchester bi-phase c) non return to zero 5. The general arrangement of ARINC 629 includes a) current mode coupler, data bus cable only b) data bus cable, stub cable, voltage mode coupler

c) data bus cable, current mode coupler, stub cable 6. To deflect the beam of a CRT horizontally, coils are placed on the neck of the tube a) one on the side, one at the bottom b) each side c) top and bottom 7. During flight (non fault conditions) the EICAS system displays on the lower CRT a) secondary engine parameters b) synoptic display c) flight phase page 8. Who can design new software? a) BCAR section A8 approved company b) BCAR section A1 approved company c) The CAA 9. Data bus cables are terminated using a) 130 ohms resistor b) 100 ohms resistor c) 25 ohms resistor 10. Modern aircraft with electronic displays would display information on airframe and engine on which system? a) Flight management system b) Electronic centralised aircraft monitoring system (ECAM) c) EADI Answers Question :1 The correct answer is b Aircraft Instruments and Intergrated Systems EHJ Pallett Page 153 Basic CPU,. Aircraft Electricity and Electronics Eismin 5th Edition Page 145 Question :2 The correct answer is c http://www.condoreng.com ARINC 429 tutorial Question :3 The correct answer is b Aircraft Electricity and Electronics Eismin 5th Edition Page 148. http://www.condoreng.com ARINC 429 tutorial Question :4 The correct answer is b http://www.condoreng.com MIL-STD-1553 tutorial Question :5 The correct answer is c Question :6 The correct answer is c Question :7 The correct answer is a Question :8 The correct answer is a AWN45a para 3.1.3 (BCAR section A sub section A8) Question :9 The correct answer is a Question :10 The correct answer is b This is exam number 39 You've been here 1 times 1. The Flight data recorder starts recording a) after take off b) on aircraft roll out from stand c) after the first engine has started

2. Data to flight data recorder can be taken form a communal data bus if a) it goes directly to it b) the power is within flight data recorder limits c) if source isolation has been considered 3. In arinc 429 data field is bits 11 to 28. If the bits 11 to 18 had pad bits, the L.S.B. Of the data would be a) bit 19 b) bit 11 c) bit 28 4. The BCD data field of arinc 429 is contained within bits a) 1-8 b) 11 - 29 c) 11-28 5. After attaching a wrist strap to you wrist (which is connected to aircraft ground), prior to removal of ESDS equipment, the resistance measured a) between the strap and the pin ground must be >10 Megohms b) between your skin and the pin ground must be

The correct answer is b Answer found in Boeing SWPM. 20-41-01 3(2) (e) Hold the red lead of the (test) meter between the forefinger and the thumb. The acceptable range is less than 10,000,000 ohms Question :6 The correct answer is c The exact definition of HIRF does not include electrostatc discharge (ESD). But only interference from outside sources. Understanding HIRF By Gerald L. Fuller Question :7 The correct answer is a Question :8 The correct answer is c Question :9 The correct answer is a Question :10 The correct answer is b This is exam number 40 You've been here 1 times 1. In a fibre optic cable a) only one data signal can be sent down it at any one time b) multiple data signals can be sent down it at one time c) data can only be sent in one direction 2. A logic 1 may be represented in an analogue system by (where Q is an output of a latch I flip-flop) a) switch open I light on IQ b) switch closed I light off / Not Q c) positive I magnetised IQ 3. A central fault display system should be available through a) a bite test b) a easily accessible multifunction control display unit c) a central bite test box with clear LED indications 4 An analogue to digital converter where it counts up to binary state eciual to the analogue in put and then back down when this is reached is a % a) successive approximation counter b) a tracking ramp type converter c) flash type converter 5. Transistors are used in a current triggered D to A device to a) switch on the input b) switch of the inputs c) change the state of the inputs 6. Radio altitude is displayed on an EFIS system a) on the Electronic Horizontal Situation Indicator b) on the Electronic Attitude Direction Indicator c) ontheRMI 7. A