11 Aviation: AGK 1

Why is in necessary to provide an adequate warm-up period before applying take-off power to a piston engine?

• oil must be brought to the correct viscosity before demanding high power

• it takes time for the filter to clean contaminants from the oil

• the spark plugs must become hot enough to initiate proper combustion

• the oil pump must be given time to build up sufficient pressure

The purpose of aerodynamic balancing of rudders or elevators (a trim device) is to

• prevent the rudder or elevator from fluttering

• improver controllability at low speeds

• to increase the rate at which the aircraft responds to control inputs

• alighten the control force required to operate the control surface

If an aircraft is equipped with a centre-zero ammeter, the normal reading on this instrument during flight should be

• a constant small charge

• a discharge that varies with the number of electrical loads that are turned on

• a charge indication that varies according to the electrical load on the system

• zero

The purpose of an impulse coupling in a magneto is to

• prevent the spark plugs from being fouled with oil

• provide current to the alternator field

• provide a strong spark when the engine is being cranked at start-up

• provide a hotter spark when the engine is at full power

Which of the following instruments require a connection to the aircraft’s static vent?

• turn and balance indicator, artificial horizon and altimeter

• airspeed indicator, artificial horizon and vertical speed indicator

• airspeed indicator, altimeter and vertical speed indicator

• vertical speed indicator, air speed indicator and turn and balance indicator

Which of these figures correctly shows the relationship between the tailplane, elevator and trim tab for an aircraft that has been trimmed to fly level at a low speed?

• a

• b

• c

• d

For a four-stroke internal combustion engine the correct order in which the strokes occur is

• compression, induction, power and exhaust

• power, compression, exhaust and induction

• induction, compression, power and exhaust

• exhaust, induction, compression and power

When a left twisting movement is applied to the control column, during flight

• the left aileron rises and the aircraft rolls to the right

• the right aileron rises and the aircraft rolls to the left

• the right aileron rises and the aircraft rolls to the right

• the left aileron rises and the aircraft rolls to the left

In the case of an engine failure or rough running in a piston engine aeroplane, the primary reason for checking the magnetos (isolating left and right) is to

• to find out which is not working by switching off a magneto that has become mistimed so that the engine will continue to develop power.

• ensure that both magnetos are operating.

• check for a drop in RPM.

• check for spark plug fouling by lead or oil.

The manoeuvring speed, VA, is the maximum speed at which full control deflection can be applied, and on an airspeed indicator, is typically

• marked by the change of the green zone to yellow.

• not marked.

• marked by a red line.

• marked by a blue line.