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2. CPLH Aircraft General Knowledge > CSYH Practice Cards 1 > Flashcards

CSYH Practice Cards 1 Flashcards

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1
Q

When cyclic feathering occurs…..

A

the pitch of each blade is altered consecutively following a cyclic control movement

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2
Q

The application of carburetor heat when ice is present will result in….

A

reduction in MP, then an increase in MP

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3
Q

The purpose of a freewheeling unit is to disconnect the…..

A

rotor system when the engine RPM slows below the equivalent RRPM

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4
Q

On application of carburettor heat when NO ICE is present, the manifold pressure will …

A

drop and remain at a lower value

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4
Q

if an engine is allowed to operate to long at idling speed …

A

the spark plugs may become fouled

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5
Q

A condenser is incorporated in the primary circuit of a magneto to …

A

prevent burning of the points

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6
Q

One function of oil in an engine is to …

A

cool the engine

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7
Q

The viscosity of an oil is a measurement of …

A

the oils resistance to flow

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8
Q

Force in a hydraulic system is …

A

pressure multiplied by area

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9
Q

Vertical speed indicators (VSI’s) measure the …

A

rate of change of static pressure

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10
Q

A low frequency vibration is most likely to be caused by …

A

an out of track main rotor blade

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11
Q

Rotor trim tabs are used to …

A

provide a method of adjusting the track of the rotor blades

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12
Q

A rotor brake is used to …

A

provide rapid deceleration of the rotor after engine shut-down

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13
Q

The duration of each stroke of a 4-stroke cycle is equivalent to …

A

180 degrees of crankshaft rotation of half a revolution

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14
Q

The generator fails just after take off in an aircraft which has a 48 amp-hour, 24 volt battery. Just prior to failure, the centre zero ammeter was reading 24 amps. Without switching off any loads, the approximate maximum interval before the battery is flat is …

A

2 hours

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15
Q

The yellow band on the carburettor air temperature gauge indicates ice is …

A

possible

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16
Q

A rotor blade in a semi-rigid rotor system has freedom to …

A

feather and flap

17
Q

If the oil level in an operating engine is below the specified minimum …

A

the engine could over heat at high power settings

18
Q

If no anti-torque control was provided the fuselage of the conventional helicopter would …

A

rotate to the right

19
Q

An unchanged altimeter reading during climb in an unpressurised aircraft could indicate a …

A

blocked static vent

20
Q

A non return valve (check valve) is fitted to a hydraulic circuit to …

A

ensure fluid only flows in one direction

21
Q

The purpose of the cooler in an aircraft hydraulic system is to …

A

cool the fluid as it returns from the pressure regulator to the reservoir

22
Q

A pressure valve fitted to an aircraft hydraulic system is designed to …

A

protect the system from excessive pressure in the event of a pressure regulator failure

23
Q

An aircraft may be equipped with an artificial horizon (attitude indicator) for the purpose of …

A

establishing attitude reference without external cues

24
Q

Aircraft engine fire detection systems on board aircraft using fire wire operated by …

A

heat of the fire changing the impedance of the detector elements in the wire to trigger a cockpit warning

25
Q

A turn and balance indicator (turn coordinator) in an aircraft is used to …

A

judge turn rate and slip or skid

26
Q

The pitot heat system on an aircraft is …

A

electric

27
Q

If the waste gate of a turbocharged engine was to stick in the fully closed position …

A

manifold pressure will rise excessively

28
Q

The clutch in a helicopter transmission system …

A

allows the engine to be started and gradually take the load of driving the rotor system

29
Q

A helicopter is equipped with a conventional centre zero type ammeter. Such an ammeter displays

A

current flow to and from the battery

30
Q

Throttle operation, during take-off for an engine fitted with a super charger, should be …

A

careful operating with attention not to exceed rated boost

31
Q

As the inlet air temperature increases as a result of use of carburettor heart, power output from the engine will …

A

decrease

32
Q

One cause of high oil temperature and low oil pressure could be …

A

very low level of oil in the sump

33
Q

The purpose of an oil cooler by-pass is …

A

to prevent oil from passing through the cooler if it’s already cold

34
Q

Pressure in a hydraulic system is defined as …

A

force per unit area

35
Q

The hydraulic reservoir provides …

A

a reserve of fluid to compensate for minor leaks

36
Q

Fuel ice in a piston engine induction system may form …

A

in the venturi of the carburettor due to the fuel latent heat of vapourisation cooling the air below zero degrees with condensation turning to ice

37
Q

What is the most likely cause of a fluctuating engine oil pressure gauge …

A

low oil level

38
Q

A centre-zero ammeter shows …

A

a negative deflection when the battery is suppling current

39
Q

The effect of using carburettor heat on mixture and power is that …

A

mixture becomes richer and power decreases

2. CPLH Aircraft General Knowledge (5 decks)

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