They may result in bearing errors.

 

 

Вопрос 43

The maximum theoretical range at which an aircraft at FL70 can obtain bearings from a ground VDF facility sited

 

425 ft above MSL is:

 

 

Ответы

1                   

134 NM

 

2                   

114 NM

 

3                   

107 NM

 

4              

NM

 

Вопрос 44

Ground direction finding at aerodromes utilises which frequencies?

 

 

Ответы

1                   

UHF at civil aerodromes and VHF at military aerodromes.

 

2                   

UHF at civil aerodromes and UHF at military aerodromes.

 

3                   

VHF at civil aerodromes and VHF at military aerodromes.

 

4              

VHF at civil aerodromes and UHF at military aerodromes.

 

Вопрос 45

An aeroplane requesting a VDF bearing should:

 

 

Ответы

1                   

not pass overhead VDF aerial.

 

2              

Avoid banking during transmission.

 

3                   

transmit on 121,5 MHz.

 

4                   

ensure that radio silence is maintained.

 

 

Вопрос 46

VDF measures the bearing of the aircraft with:

 

 

Ответы

1                   

reference to true or magnetic north at the aircraft.

 

2              

Reference to true or magnetic north at the station.

 

3                   

reference to aircraft relative bearing.

 

4                   

reference only to magnetic north at the aircraft.

 

 

Вопрос 47

What is the approximate maximum theoretical range at which an aircraft at FL140 could receive information from

 

a VDF facility which is sited 1600 ft above MSL?

 

 

Ответы

1              

NM

 

2                   

180 NM

 

3                   

120 NM

 

4                   

220 NM

 

 

Вопрос 48

What is the "Q" code for a magnetic bearing from a VDF station?

 

 

Ответы

1                   

QDM

 

2                   

QUJ

 

3                   

QTE

 

4              

QDR

 

Вопрос 49

Which of the following factors could cause an error of an ADF bearing of an NDB?

 

 

Ответы

1                   

Phase interference.

 

2              

Night effect.

 

3                   

Scalloping.

 

4                   

Atmospheric scatter.

 

 

Вопрос 50

You are on a magnetic heading of 045° and your ADF indicates a relative bearing of 315°. The QDM is:

 

 

Ответы

1                   

055°

 

2                   

020°

 

3                   

235°

 

4              

360°

 

 

Вопрос 51

The ADF indication in the cockpit is a:

 

 

Ответы

1              

Relative bearing on a fixed card indicator.

 

2                   

magnetic bearing on a fixed card indicator.

 

3                   

relative bearing on an RMI.

 

4                   

true bearing on an RMI.

 

Вопрос 52

Locators are:

 

1) High powered NDBs used for en route and airways navigation.

 

2) Low powered NDBs used for airfield or runway approach.

 

3) Beacons with a typical range of 10 - 200 NM.

 

4) Beacons with a typical range of 10 - 25 NM.

 

The combination regrouping all the correct statements is:

 

 

Ответы

1                   

1,4

 

2              

2,4

 

3                   

2,3

 

4                   

1,3

 

Вопрос 53

If an NDB with a transmitter power of 25 kW which has a range of 50 NM is adjusted to give a power output of 225 kW the new

 

range of the NDB will be approximately:

 

 

Ответы

1              

NM

 

2                   

200 NM

 

3                   

100 NM

 

4                   

400 NM

 

Вопрос 54

An NDB transmits a signal pattern in the horizontal plane which is:

 

 

Ответы

1                   

bi-lobal circular.

 

2                   

a cardioid balanced at 30 Hz.

 

3              

Omni-directional.

 

4                   

a beam rotating at 30 Hz.

 

Вопрос 55

An NDB has a range of 50 NM with a power output of 80 W. The power required to increase the range to 100 NM is:

 

 

Ответы

1                   

150 W.

 

2                   

120 W.

 

3                   

180 W.

 

4              

W.

 

 

Вопрос 56

A loop aerial, as used in the ADF, will:

 

 

Ответы

1                   

provide the most accurate bearing when it is aligned in the direction resulting in highest signal strength to the ADF receiver.

 

2              

Receive a minimum or null signal from a transmitter when the plane of the loop is at right angles to the direction of the

Transmitter.

 

3                   

receive a minimum or null signal from a transmitter when the plane of the loop is parallel to the direction of the transmitter.

 

4                   

always rotate at constant speed before locking on to a signal from an NDB.

 

Вопрос 57

On the QDR of 075° (in the vicinity of the station) with a magnetic heading of 315°, the relative bearing on the ADF indicator is:

 

 

Ответы

1                   

320°

 

2                   

220°

 

3              

340°

 

4                   

140°

 

Вопрос 58

The reading of the RMI bearing is 320° at the tip of the needle. The magnetic variation at the DR position is 24°W, the magnetic

 

variation at the NDB is 22°W and the deviation is -2°. The compass heading is 020°. The true bearing is:

 

 

Ответы

1                   

274°

 

2                   

272°

 

3                   

094°

 

4              

294°

 

Вопрос 59

A cumulonimbus cloud in the vicinity of an aeroplane can cause certain navigation systems to give false indications. This

 

particularly true of the:

 

 

Ответы

1                   

VOR.

 

2                   

weather radar.

 

3              

ADF.

 

4                   

DME.

 

Вопрос 60

A locator:

 

1) is a high powered beacon.

 

2) is a low powered beacon.

 

3) typically has a range of 10 - 200 NM.

 

4) typically has a range of 10 - 25 NM.

 

The combination regrouping all the correct statements

 

 

Ответы

1                   

2,3

 

2                   

1,3

 

3              

2,4

 

4                   

1,4

 

 

Вопрос 61

In an ADF Night Effect may cause:

 

 

Ответы

1                   

A constant error in the indicated bearing.

 

2              

Fluctuating indications of the needle on the RMI.

 

3                   

Noise in the received EM-wave, which hardly will be noticed by the pilot looking at the RMI.

 

4                   

No bearing error because of the built-in compensator unit.

 

 

Вопрос 62

The Automatic Direction Finder (ADF) uses the following wavelength:

 

 

Ответы

1                   

metric.

 

2                   

decimetric.

 

3              

Hectometric or kilometric.

 

4                   

centimetric.

 

 

Вопрос 63

Which of the following is true about the ADF?

 

 

Ответы

1