This is a timed quiz. You will be given 2100 seconds to answer all questions. Are you ready?
What is a semi-monocoque structure?
A full monocoque structure is a structure where the skin takes all of the load. This requires a very thick and heavy skin. Furthermore if the skin is damaged in anyway the entire structure is compromised. A semi monocoque structure has a light frame work which supports the skin. The result of this is that the skin can be much thiner and lighter. And if the skin is damaged the light frame work will take up the load therefore not compromising the entire structure.
The wing structure elements which take up vertical bending loads are:
Wings generally have more than one internal spar. They run from the fuselage to the wingtip and are the main structural component of the wing.
The engines of most modern light aircraft are cooled by:
The simplest way to cool an engine, air enters through the cowling and circulates around the engine to transfer the heat of the engine, thereby cooling it down.
When carburettor heat is applied:
As hot air is applied the air density decreases, thereby increasing the fuel/air mixture.
During one complete โOttoโ cycle each piston will move:
The otto cycle is a four stroke cycle: In the intake stage the piston moves down, in the compression the piston moves up, in the combustion the piston moves down, in the exhaust the piston moves up.
In a piston engine the supply for the spark plugs is:
The necessary high tension electric current that is needed for the spark plugs comes from the self-contained magnetos.
The ideal ratio of fuel to air by weight is approximately:
1 part fuel to 12 parts air is the ideal ratio. 1:8 would be a rich mixture and 1:20 would be considered a lean mixture.
What of the following factors would be likely to increase the possibility of detonation occurring within a piston engine?
Too lean a mixture would mean not enough fuel in the engine so the engine will not be efficiently cooled, increasing the possibility of detonation.
During flight it is seen that the oil pressure gauge is indicating zero, what may be done to confirm what is happening?
Oil temperature and pressure should always be checked together as the properties are very closely linked. Checking the temperature gauge when the pressure indicates zero will help the pilots decide whether it is a true indication or a gauge failure.
To adjust the mixture ratio of a piston engine when altitude increases, means to:
As altitude increases, air density decreases. Mixture should be leaned to decrease the fuel flow and regain a more chemically correct fuel/air ratio.
What is the purpose of baffles fitted within the fuel tank?
Baffles prevent the movement of fuel in normal manoeuvring of the aircraft.
An under inflated tyre will:
An under inflated tyre will not have sufficient pressure to keep the tyre tight around the wheel, so on taxying can experience creep.
Two 12 volt 50 amp/ batteries connected in parallel are equal to:
Batteries connected in parallel, rather than in series, will act as one, adding up the voltage and amperage of each battery.
Gyroscopes may be used in the:
A gyroscope is a rotating wheel mounted around an axis. It maintains an absolute direction in space, a property called โrigidityโ. Because of this the gyro is a useful indicator of direction and attitude as it remains stable as the aeroplane moves around it.
One possible cause of โnose wheel shimmyโ is:
A torque link is used to correctly align the nose wheel with the airframe. Failure of this would allow the nose wheel to oscillate a few degrees either side of centre. A bit like pushing an old shopping trolley with a broken wheel.
A lower than normal suction gauge reading may mean:
If the air filter is blocked the suction gauge might read lower as not as much air can be sucked in.Note that the question states ‘lower than normal’ and not zero. Therefore the pump has not failed otherwise there would be no suction at all.