Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license

Question 1

The operating frequency range of a low altitude radio altimeter is:

Accepted Answer

4200 MHz to 4400 MHz.

Answer

5400 MHz or 9400 MHz.

Answer

2700 MHz to 2900 MHz.

Answer

5 GHz.

Question 2

Among the systematic errors of the 'directional gyro', the error due to the earth rotation make the north reference turn in the horizontal plane. At a mean latitude of 45°N, this reference turns by...

Accepted Answer

10.5°/hour to the right.

Answer

7.5°/hour to the right.

Answer

15°/hour to the right.

Answer

7.5°/hour to the left.

Question 3

Maintaining CAS and flight level constant, a fall in ambient temperature results in:

Accepted Answer

Lower TAS because air density increases

Answer

Lower TAS because air density decreases

Answer

Higher TAS because air density decreases

Answer

Higher TAS because air density increases

Question 4

The two main sources of information used to calculate turbojet thrust are the:

Accepted Answer

Fan rotation speed (or N1) or the EPR (Engine Pressure Ratio).

Answer

Fan rotation speed (or N1) or the total pressure at the low pressure turbine outlet.

Answer

Fan rotation speed (or N1) or the total pressure at the high pressure compressor outlet.

Answer

High pressure turbine rotation speed or the EPR (Engine Pressure Ratio).

Question 5

The vertical speed indicator (VSI) is fed by:

Accepted Answer

Static pressure

Answer

Dynamic pressure

Answer

Total pressure

Answer

Differential pressure

Question 6

The upper antenna of the TCAS II is:

Accepted Answer

Directional to improve the surveillance of intruders.

Answer

Omni-directional because it is merged with the transponder antenna.

Answer

Directional because it is merged with the transponder antenna.

Answer

Omni-directional to improve the surveillance of intruders.

Question 7

The spin axis of the turn indicator gyroscope is parallel to the:

Accepted Answer

Pitch axis.

Answer

Yaw axis.

Answer

Roll axis.

Answer

Longitudinal axis.

Question 8

At 50 feet AGL during an auto-land, what happens to the glideslope signal?

Accepted Answer

Is disconnected.

Answer

Is used to flare the aircraft.

Answer

Is factored for range.

Answer

Is used until the nose landing gear touches the ground.

Question 9

The principle of a laser gyro is based on:

Accepted Answer

Frequency difference between two laser beams rotating in opposite direction.

Answer

A gyroscope associated with a laser compensating for gimballing errors.

Answer

A gyroscope associated with a laser compensating for apparent wander due to the rotation of the earth.

Answer

Two rotating cavities provided with mirrors.

Question 10

The initiation of an automatic go-around can be:

Accepted Answer

In a range of approach airspeeds.

Answer

At 70 kts ± 5 kts only.

Answer

With no limit of approach airspeeds.

Answer

At VY ± 5 kts only.

Quiz Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license

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