1 Altitude hold sensor consist of -A Capsule assembly B E and I bar C Chaser motor D All

2 Chaser motor is a-A Induction type motor B Single phase induction type motor C 2-phase induction type motor D

d.c motor3 Altitude hold sensor is also known asA command sensor B lock sensor C pick off sensor D only c is correct

4 The system which perform a manoeuvre or series of manoeuvres, such as an automatic ILS approch Flare and landing

in low visiblity condition is known as-A Autopilot B Operational autopilot C Rate damping D Yaw damper

5 In airspeed hold transmission is by means of ………….A control synchro B Tx synchro C ganged potentiometer D fixed

potentiometer6 MTCSA airspeed hold sensors are used in conjunction with altitude hold sensor B altitude sensor measures

only static pressure changeC airspeed measures differential pressure D All

7 The capsule assembly expands or contract under the influence of pressure differential created by

A change of airspeed B change of a/c speed C change in sensor position D change in speed of motor

8 In SAS the stick position pick off consist ofA RVDT B LVDT C RBDT D Space Gyro

9 MTCSA LVDT disconnect the signal from the rate gyro to the leaky B red sensing switch connected

series with stick position pick offindegrator

C both a and b D only b is correct10 Torque synchro system mainly concerned with

A torque B turning force C linear force D both a and b11 What is the operating principle of the sensing device used in an autopilot system

A The reaction of force 90 degree away from the applied force in B The relative motion between a gyro and its supporting system

the direction of gyro rotationC The rate of change of motion between the gyro gimbal rings and the aircraft D none

12 For driving larger loads in servomachanism what is usedA D.C series motor B compound wound motor C synchoronous motor D Induction motor

13 In auto-pilot , which signal nullifies the inputA Displacement signal B Feed back signal C Follow up signal D Either a or b

14 Chaser amplifier used in servomechanism causes-A Movements in discrete step B Movement of heavy loads C Movements of light loads D None15 MTCS regarding synchro-A Torque synchro are used for conversion of cartesian to polar co- ordinates and vice versa

BError signal representive of two angular position is measured by differential synchro and is used with either torque, control or resolver synchro system

C Converson of cartesian to polar co-rdinates and vice versa is done D both b and c correctby resolver synchro.

16 In autopilot system which gyro is used-A Rate gyro B Tied gyro C Earth gyro D Degree gyro

17 The purpose of autopilot follow up signal is -A It stops error amplification so that control surface is free to B it stops the control surface when

sufficient movement has operated by human pilot been made

C Enable humanpilot to follow the corrective action of the autopilot D none18 In applying particular types of automatic flight control system to individual aircraft control

system, it is necessary to provide facilities for alerting the response of automatic system to any given level of input signal

this is provided by adjusting-

A The gain of control system B The wash out circuit of autopilot C The reversing links D All of the above

19 What is the main purpose of servo motor in AFCS-A Change mechanical energy in to electrical energy B Correct the distance about its axisC Move the contro surface as required D Drive the control surface both to standard

20 IN speed control of AFCS, Which of the following is used-A Speed brakes B Throttle C Pitch chanel D none

21 The synchro typically used in flight instrument is-A Torque synchro B Control synchro C Differential synchro D Resolver synchro

22 The synchro whose rotor does not require excitation is-A Torque synchro B Control synchro C Differential synchro D Resolver synchro

23 Pitch axis is-A Longitudinal axisB Lateral axis C Yaw axis D none

24 Yaw damper acts on-A Elevator B Aileron C Rudder pedal D Rudder

25 For measuring Position of Two angular inputs Which synchro is used-A Torque B Control C Resolver D Differential

26 In gyro theory of angular momentum is applied forA Rigidity B Precession C Both a and b D only a is correct

27 Precise angular measurement is done by which synchroA Resolver synchro B Differential synchro C torque synchro D Control synchro

28 In autopilot system INS mode supplies commands signals to-A Pitch channel B Roll channel C Yaw channel D Both a and b

29 In modern aircraft trimming is provided as-A Roll axis B Pitch axis C Yaw axis D all30 The longitudinal stability of aircraft is-A Roll stability B Pitch stabilityC Depends on the design of horizontal stabilizer D Both b and c

31 The oscillatory motion of equal frequency in roll and yaw axis of the aircraft is-A Divergence B Spiral divergence C Dutch roll D Roll hold

32 In autopilot system the limiting net work are used to-A Reduce gain of amplifier signal B Reduce gain of servo motorC Prevent excessive attitude change and harsh manovering D None of the above

33 The resolver synchro -A Converts cartesian coordinates into a shaft position and voltage B Has four rotors a pair in series

and at right angles to each otherwhich together represents the polar co-ordinates.

C Only b is correct D Both a and b is correct34 In AFCS, When command is given to pitch and roll simultaneously which channel will move first-

A Roll B Pitch C Roll and pitch simultaneously D none35 Sensor suitable for low , high and differential pressure-

A Capsule B Diaphragm C Bourdon D Bellows36 What will occur if an aircraft attitude is changed by its autopilot system in order to correct for

an error and the involved control surfaces are immediately return to stream line by the time the aircraft has

reached his correct position A Over shoot and oscillation B under shoot and oscillation C Normal operation D None

37 Which synchro is used in servomechanism.A Torque synchro B control synchro C none D all

38 What is the Primary purpose of an autopilot?A To relieve the pilot of control of the aircraft during long periods of flight. B To fly a more precise

course for the pilotC To obtain the navigational aid necessary for extended overwater flights. D None

39 In Which control element of an autopilot system is an attitude indicator?A Command B Sensing C Input D none

40 What component of an autopilot system applies torque to the control surfaces of an aircraft?A Servo B Controller C Gyro D All

41 What is the main purpose of a servo in an autopilot system?A Corrrect for displacement of the aircraft about its axis B Change mechanical energy to electrical

energyC Move the control surfaces as commanded D None

42 Which channel of an autopilot detects changes in pitch attitude of an aircraft?

A Elevator B Aileron C Rudder D None43 The elevator channel of an autopilot controls the aircraft about which axis of rotation?

A Roll B Longitudinal C Lateral D None44 What component is the sensing device in an electromechnical autopilot system?

A Servo B Gyro C Controller D none45 A fully integrated autopilot controls the aircraft around how many axes?

A Two B Three C Four D all46 Dutch roll, a combination yawing and rolling oscillation that affects many sweptwing aircraft, is

counteracted with-A Flight director system B an aileron damper system C a yaw damper system D None

47 Bourdon tube measures-A high pressure B differential pressure C Low pressure D all

48 In order to derive a D.C control signal having the same phase relationship with an A.C error signal in an autopilot

system, It is necessary for the signals to be-A Differentiated B Integrated C Demodulated D Modulated

49 A synchro transmitter is connected to a synchro receiver-A Mechanically through linkage B Magnetically through highly permeable coresC Electrically with wires D For appearance only, since there is no physical

connection between the two

50 Gyroscopic principle is based on-A Law of conservation of energy B Law of conservation of momentumC Newton 3rd law of motion D None