1. During ground operation of an engine, the cowl flaps should be in what position?A) One-third openB) Fully openC) Two-thirds openD) Fully closed2. An impulse coupling used on a magneto for a piston engine is for:A) increases the power and gives a hotter spark for engine startingB) providing an advanced spark for engine startingC) advancing ignition timingD) providing a retarded spark for engine starting3. Icing of the carburettor can take place?A) When ambient air temperature is at or below 0° C and sufficient moisture is presentB) Any timeC) When ambient air temperature is at or below 0° CD) When the temperature drops and sufficient moisture is present for sublimation4. The purpose of a condenser in a magneto is to:A) reduce the efficiency of the

magnetoB) prevent arcing across the pointsC) prevent interference on VHFD) prevent over heating5. When the carburettor air intake is in HOT AIR the power output of the engine is reduced because:A) the density of the fuel charge entering the cylinders is

decreasedB) the mixture is richerC) the density of the fuel charge entering the cylinders is increasedD) the mixture is lighter6. Manifold pressure is increased when:A) altitude is

increasedB) ignition is retardedC) ignition is advancedD) rpm are increased7. As engine speed increases the ignition spark:A) is retardedB) is produced earlierC) is produced earlier once above maximum continuous rated

rpmD) is not altered8. A spark occurs when the:A) CB openB) Rotor arm is trailedC) Contact breakers (CB) closeD) CB are nearly closed9. After TDC and on the induction stroke:A) The inlet valve starts to closeB) The exhaust is closedC) The exhaust valve remains open to ensure complete removal of the spent gasD) The inlet valve starts to open10. In an aircraft equipped with a float-type carburettor and a constant-speed propeller, carburettor icing would probably first be detected by:A) A drop in manifold pressureB) A drop in RPMC) A decrease in RPM and increase in manifold pressureD) An increase in RPM and drop in manifold pressure11. The useful work area in an ideal Otto engine indicator diagram is enclosed by the following gas state change lines:A) 2 adiabatic and 2 isochoric linesB) 2 adiabatic and 1 isothermal linesC) 2 adiabatic and 2 isobaric linesD) 2 adiabatic, 1 isochoric and 1 isobaric lines

12. The turbo-charger bearing is lubricated and cooled by:A) its own internal self contained oil systemB) the engine oilC) a tapping in the scavenge oil systemD) a total loss system13. If an engine fails to stop with the magneto switch in OFF position, the cause may be:A) defective condenserB) fouled spark plugsC) excessive carbon formation in cylinder

headD) switch wire grounded14. When priming a piston engine, fuel is induced into:A) the combustion

chamberB) the diffuserC) the exhaust manifoldD) the induction manifold15. If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine:A) cannot be started with the switch in the ON positionB) will not operate at the left magnetoC) will not operate at the right magnetoD) cannot be shut down by turning the switch to the OFF position16. An abnormally high engine oil temperature indication may be caused by:A) the oil level being too lowB) operating with an excessively rich

mixtureC) operating with a too high viscosity oilD) the oil level being too high17. What type fuel can be substituted for an aircraft if the recommended octane is not available?A) Unleaded automotive gas of the same octane

ratingB) The next higher octane aviation gasC) None of the aboveD) The next lower octane aviation gas18. The propeller blade angle is defined as the acute angle between the airfoil section chord line (at the blade reference station) and which of the following?A) The axis of blade rotation during pitch changeB) The relative windC) The plane of rotationD) The propeller thrust line19. What can be the consequence during a descent with a fully open throttle if the waste gate is seized?A) The manifold air pressure (MAP) value may exceed the maximum allowed valueB) The turbine shaft will breakC) The turbine blades will separateD) The power of the motor will decrease20.When increasing true airspeed with a constant engine RPM, the angle of attack of a fixed pitch propeller:A) increasesB) stays constant because it only varies with engine RPMC) reducesD) stays constant21.In a piston engine, magnetos are used to produce the spark which ignites the fuel/air mixture. The operating principle of magnetos consists in:A) creating a brief high intensity magnetic field which will be sent through the distributor at the

appropriate timeB) accumulating in a condenser a low volt current from the battery, reconstitute it as high voltage

current at the moment the spark is generatedC) breaking the primary current in order to induce a low amp high volt current which is distributed to

the spark plugs

D) obtaining a high amp low volt current in order to generate the spark22.Compression ratio is the ratio between the:A) fuel and air in the combustion chamberB) cylinder volume with piston at bottom dead centre and at top dead centreC) combustion chamber pressure on the combustion stroke and on the exhaust strokeD) piston travel on the compression stroke and the intake stroke23.The control system of a turbocharger tries to maintain a constant:A) true air speedB) carburettor inlet pressure or densityC) boost pressureD) turbocharger rpm24.The flash point of fuel is:A) highest temperature of vapourB) highest temperature of fluidC) lowest temperature of fluidD) lowest temperature of vapou25.In a piston engine, the purpose of an altitude mixture control is to:A) correct for variations in the fuel/air ratio due to decreased air density at altitude.B) enrich the mixture strength due to decreased air density at altitude.C) prevent a weak cut when the throttle is opened rapidly at altitude.D) weaken the mixture strength because of reduced exhaust back pressure at altitude.26.The use of a turbocharger on an engine will:A) increase fuel consumptionB) improve cylinder scavengingC) cause an automatic rise in the engine rpm as altitude is gainedD) raise the engine thermal efficiency27.The power output of a normally aspirated piston engine increases with increasing altitude at constant Manifold Air Pressure (MAP) and RPM because of the:A) lower friction lossesB) lower back pressureC) leaner mixture at higher altitudesD) lower losses during the gas change28.What component in a four strokes piston engine converts the reciprocating action into rotational movement?A) the pistonB) the connecting

rodC) the camshaftD) the crankshaft29.The stroke of a piston engine is equal to:A) the swept volumeB) four times the crank throwC) half the crank throwD) twice the crank throw30.For internal cooling, reciprocating engines are especially dependent on:A) a rich fuel/air mixtureB) the circulation of lubricating oilC) a lean fuel/air mixtureD) a properly functioning thermostat31.Absolute Pressure is:A) gauge pressure plus standard atmospheric pressureB) gauge PressureC) standard atmospheric pressureD) gauge pressure minus standard atmospheric

pressure32.When is spark plug fouling most likely to occur?A) Maximum take-off powerB) Cruise powerC) In the descent if you have not adjusted the mixtureD) In the climb if you have not adjusted the mixture33.The oil cooler of a piston engine lubrication system is fitted:

A) at the back of the engine and between the pressure pump and tankB) at the front of the engine and between the pressure pump and tankC) at the front of the engine and between the scavenge pump and tankD) at the back of the engine and between the scavenge pump and tank34.The coolant temperature of a liquid cooled engine is controlled by:

A) oil cooler shutters B) cowling gills C) temperature

regulator D) radiator shutters

35.If the volume of air passing through a carburettor venturi is reduced, the pressure at the venturi throat will:A) be equal to the pressure at the venturi inletB) decreaseC) increaseD) be equal to the pressure at the venturi outlet36.The high tension voltage provided by a magneto is produced by:A) static forcesB) by magnetic induction in the primary windingC) boosting the electrical supply to the

generatorD) by induction37.One of the advantages of a turbocharger is:A) that there is no danger of detonation.B) that there is no torsion at the crankshaft.C) to make the power available less dependent on altitude.D) that is has a better propulsive efficiency.38.Swept volume is:A) total volume above the piston when it is at bottom dead centre, multiplied by the clearance volume

when the piston is at the top dead centreB) the area of the top of the piston divided by the distance of movement of the pistonC) the area of the top of the piston multiplied by the distance of movement of the pistonD) the clearance volume when the piston is at the top dead centre, divided by the total volume above

the piston when it is at bottom dead centre39.Generally speaking, the use of carburettor heat tends to:A) decrease engine performanceB) None of the aboveC) increase engine performanceD) have no effect on engine

performance40.In order to turn a magneto off, the primary circuit must be:A) EnergisedB) De-energisedC) GroundedD) Disconnecte

d41.Rated boost is:A) more than the take-off boostB) less than the take-off boostC) the same as the take-off boostD) sometimes called economical cruising

boost42.Carburettor hot air is selected to:A) increase the cylinder head temperatureB) overcome carburettor icingC) compensate for high atmospheric

humidityD) reduce fuel consumption43.The main reason why methanol is mixed with water (water injection) is:A) to prevent the mixture from freezingB) to supply additional cooling in the combustion

chamberC) to decrease the density of the mixtureD) to prevent corrosion44.Under normal running conditions a magneto draws primary current:A) from a self-contained electro-magnetic induction systemB) from the booster coilC) directly from the aircraft batteriesD) from the aircraft batteries via an inverter45.With a piston engine, when detonation is recognised, you:A) reduce manifold pressure and lean the mixture.B) increase manifold pressure and lean the mixture.C) increase manifold pressure and enrich the mixture.D) reduce manifold pressure and enrich the mixture.46.The action of the density controller when sensing a rise in the supercharger delivery air temperature is to:A) decrease the opening of the waste gateB) increase the flow of coolant through the intercoolerC) raise the supercharger discharge pressure datumD) increase the opening of the waste gate47.For a piston engine, the ideal fuel/air mixture corresponding to a richness of 1 is obtained for a weight ratio of:A) 1/9thB) 1/12thC) 1/10thD) 1/15th48.What is a 'Squared' or 'Square Cage' piston engine?A) an engine who's bore is equal to the piston diameter squaredB) an engine who's bore is equal to its strokeC) an engine with four cylinders, forming a square which are horizontally opposed to each otherD) an engine who's bore is equal to the radius of the piston49.Detonation in an engine's cylinders would take place on the:A) exhaust strokeB) compression

strokeC) induction strokeD) power stroke50.The presence of carburettor ice, in an airplane equipped with a fixed-pitch propeller can be verified by applying carburettor heat and noting:A) a decrease in RPM, followed by an increase in RPMB) increase in RPMC) an increase in RPM, followed by a slight decrease in RPMD) decrease in RPM