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SACAA CPL ATG > Test 2 > Flashcards

Test 2 Flashcards

1
Q

Malfunction of the automatic pressurization system is indicated by?

A

The cabin altitude gauge indicating an abnormal rate of climb / The differential pressure between the external and internal pressures

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2
Q

The cabin heating supply in a heavy transport jet is obtained from?

A

Hot air bleed from the compressors

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3
Q

On most transport aircraft, cockpit windows are protected against icing by?

A

Electrical Heating

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4
Q

The purpose of baffles in an aeroplane’s wing fuel tank is to?

A

Restrict fuel movement in the tank

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5
Q

The fuel cross-feed system:

A

allows feeding any engine from any tank

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6
Q

The purpose of stringers, used in fuselage construction, is to?

A

assist the skin to absorb longitudinal compression loads

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7
Q

Assuming a hydraulic accumulator s pre-charges with nitrogen to 1000psi, if the hydraulic system is pressurized to its operating pressure of 3000psi, the indicated pressure on the nitrogen side of the accumulator should be?

A

3000psi

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8
Q

Parameters to monitor a hydraulic system in the cockpit can be?

A

Pressure and RPM of the hydraulic pump

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9
Q

Compared to a tyre fitted with an inner tube, a tubeless tyre presents the following characteristics?

A

Low risk of bursting / better adjustment to wheels

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10
Q

The purpose of the oil and the nitrogen in the oleo-pneumatic strut is?

A

The oil provides the damping function and the nitrogen provides the spring function

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11
Q

The two deformation modes that cause wing flutter are?

A

Torsion and Bending

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12
Q

In an aeroplane fitted with a constant frequency AC power supply, DC power is obtained from a?

A

Transformer Rectifier Unit

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13
Q

The moving part in an AC generator is usually referred to as the?

A

Rotor

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14
Q

The test to assess the state of change of a lead-acid battery is to?

A

Compare the on-load and off-load battery voltages

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15
Q

Generators, when connected to the same bus bar, are usually connected…

A

In series mode

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16
Q

Regarding Ohm’s law…

A

The current in a circuit is directly proportional to the resistance of the circuit

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17
Q

The power output of a generator is controlled by?

A

The reverse current relay circuit breaker

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18
Q

One indication of inadequate bonding of aircraft components may be?

A

Heavy corrosion on the fuselage skin mountings

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19
Q

The main reason for opening the cowl flaps is to control the?

A

C.H.T

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20
Q

During a climb in a standard atmosphere with constant MAP and RPM indications and at a constant mixture setting, the power output of a piston engine…

A

Decreases

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21
Q

In which section of the carburetor would icing most likely occur?

A

Venture and butterfly valve

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22
Q

The conditions which can cause knocking are?

A

High MAP, Low RPM

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23
Q

On a normally aspirated engine, the MAP gauge always indicates?

A

A lower value than atmospheric pressure when the engine is running

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24
Q

The thermal efficiency of a piston engine is about?

A

70%

25
Q

The operating principle of magnetos in a piston engine ignition system consists of?

A

Breaking the primary circuit n order to induce a low amperage, high voltage current, which is distributed to the spark plugs.

26
Q

The oil cooler in a dry-sump lubrication system of a piston engine can be fitted?

A

After the pressure pump but before the oil passes through the engine / after the oil has passed through the engine and before it enters the sump

27
Q

In a subsonic convergent duct the…

A

Pressure increases, velocity decreases, and temperature decreases

28
Q

One of the advantages of an annular combustion chamber over a multi-can is that?

A

Engine length is shorter because no diffuser is required

29
Q

After the air has passed through the compressor of a gas turbine engine the?

A

The temperature will be higher than the inlet temperature

30
Q

In a jet engine the propelling nozzle?

A

Decreases the velocity and increases the pressure in the jet pipe to provide greater thrust

31
Q

To achieve reverse thrust on a turbine engine with a high bypass ratio, it is necessary to?

A

Reduce the flow of hot steam air

32
Q

Engine temperature limitations are usually imposed due to temperature limitations on the:

A

Compressor section

33
Q

For a turbine engine, the self-sustaining speed relates to the minimum RPM at which the engine…

A

will run without any stater motor assistance

34
Q

In a gas turbine engine, the propelling jet is generated by?

A

Expansion of hot gases resulting in a conversion of potential energy (pressure) into kinetic energy (velocity)

35
Q

Any vibration displayed on an engine vibration monitoring system for a turbojet

A

Indicates rotor imbalance

36
Q

The low electrical power that cannot bring the engine up to self-sustaining speed quickly enough will most likely result in a:

A

Hung Start

37
Q

Which statement is correct?

  1. The freezing point for JET A is at a lower temperature than that of JET B
  2. The flashpoint for JET A is at a higher temperature than that of JET B
A

1 is Correct, 2 is Correct

38
Q

Fuel for gas turbine engines is usually heated in order to…

A

Improve atomization at low temperature

39
Q

The use of igniters is necessary or recommended on a turbo-jet

A

For a ground start, For in-flight relights, during turbulence, under heavy rain, or in icing.

40
Q

If the main oil filter of a gas turbine engine becomes clogged, oil to the main bearings is still assured…

A

Because the oil filter bypass valve opens

41
Q

One of the advantages of multi-spool engine designs is that?

A

If one spool seizes the remaining spools will continue to operate.

42
Q

In the airflow through a single-spool axial-flow turbo-jet engine, the axial velocity of the air is greatest

A

As it leaves the compressors

43
Q

Chemical oxygen generators are used to furnish oxygen to the…

A

Cabin only

44
Q

H20 extinguishers are fit to fight fires on?

A

Metals, flammable gases, and chemical products

45
Q

The fire extinguisher type which may be used to fight fir on flammable liquids are?

A

H20, CO2, Dry-Chemicals, Halon

46
Q

Durning hydroplaning, the friction coefficient between tyre and runway surface is approximate?

A

0.25

47
Q

According to ICAO Doc 4444, a wake turbulence non-radar separation minima of 2 minutes shall be applied to?

A

MEDIUM A/C taking-off behind a HEAVY A/C from an intermediate part of a parallel runway separated by less than 760m

48
Q

Assuming no compressibility effects, induced drag at constant IAS is affected by?

A

Engine thrust

49
Q

A horn balance in a control system has the following purpose?

A

To obtain mass balancing

50
Q

The bank angle in a rate-one turn depends on?

A

TAS

51
Q

What will happen in ground effect?

A

The induse AOA and indused drag decrease

52
Q

In the absence of position and instrument error, IAS equals to?

A

EAS

53
Q

Lift is?

A

The vertical component of the total aerodynamic force, perpendicular to the undisturbed airflow

54
Q

After take-off, the slats, are always retracted later than the flaps. Why?

A

Because SLATS EXTENDED gives a large decrease in stall speed with relatively less drag.

55
Q

Which statement is correct about the propeller?

  1. Asymmetric blade effect reduces when engine power is increased.
  2. Asymmetric blade effect is independent of the angle between the propeller axis and the airflow through the propeller disk
A

1 is Incorrect, 2 is Correct

56
Q

The blade angle of a propeller is usually referenced at?

A

50% of the blade radius

57
Q

During an erect spin recovery?

A

The ailerons are held in the neutral position

58
Q

Which part of the aeroplane provides the greatest positive contribution to static longitudinal stability?

A

The fuselage

59
Q

Which of the following situations lead to a decreasing stall speed (IAS)

A

Decreasing Weight

SACAA CPL ATG (4 decks)

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