Aircraft General Knowledge Flashcards
Questions and statements for the PPL Aircraft General Knowledge syllubus (40 cards)
A condenser is included in the primary circuit of a magneto to …
prevent burning of the points
A voltage regulator controls alternator output by …
varying the current flow to the alternator field coil
The viscosity of an oil is a measure of …
the oils resistance to flow
Force in a hydraulic system is calculated by …
pressure multiplied by area
A helicopter is flying at an altitude where there isn’t enough power to hover in or out of ground effect, but it can maintain level flight at a speed 10 knots above the best rate of climb airspeed. In this situation, the helicopter would likely.
be able to maintain level flight across a range of speeds, both above and below the best rate of climb airspeed.
The purpose of specifying a maximum rotor RPM for power on operations is to …
protect the engine and transmission against excessive stresses
If an engine is allowed to operate too long at idling speed …
the spark plugs may become fouled
A free wheeling unit is used to disconnect the …
rotor system when the engine slows below the equivalent RRPM
Compared to the TAS required for the best rate of climb at MSL, the TAS for best rate of climb …
increases as density altitude increases
Hydraulic fluids are considered to be …
virtually incompressible
An unchanged altimeter reading during climb in an unpressurised aircraft could indicate a …
blocked static vent
For a fixed maximum gross weight, comparing a helicopter with a two-blade rotor system to one with a four-blade rotor system would expect that …
the four blade rotor system will have a greater disc loading compaired to the two blade
The primary risk of running an engine at full power when the oil temperature is below the minimum is …
engine parts may be unevenly lubricated
The Never Exceed Speed (VNE) is required because of the need to limit stresses within the …
main rotor head components
VNE is a term usually related to …
IAS and retreating blade stall
When a helicopter is flown at a density altitude where it has enough power to hover out of ground effect, the optimal airspeed is …
always greater than best rate of climb airspeed
A centre-zero ammeter shows a negative deflections when …
the battery is supplying current
One function of oil in an engine is to …
cool the engine
The purpose of an oil cooler by-pass is …
to prevent oil from passing through the cooler if it’s already cold
The purpose of specifying a minimum rotor RPM for power on operations is …
to protect against excess coning angle and overpitching
The purpose of a freewheeling unit is to disconnect the…..
rotor system when the engine RPM slows below the equivalent rotor RPM
The viscosity of an oil is a measurement of …
the oils resistance to flow
The duration of each stroke of a 4-stroke cycle is equivalent to …
180 degrees of crankshaft rotation or half a revolution
A rotor blade in a semi-rigid rotor system has freedom to …
feather and flap
