Is to prevent self-triggering of the receiving equipment by the transmitter.

 

2                   

is to avoid the reception in the aircraft of signals referring to other aircraft.

 

3                   

is to prevent overload of the system.

 

4                   

is to permit more channels in the system.

 

Вопрос 113

Given:

 

Aircraft position 52°09'S 024°E, magnetic variation 14°E, FL 310.

 

BIT VOR/DME position 54°42'S 024°E, magnetic variation 14°W.

 

In order to read the most accurate ground speed given by the DME receiver from his present position, the pilot

 

must follow which BIT radial?

 

 

Ответы

1                   

166°

 

2              

014°

 

3                   

194°

 

4                   

346°

 

 

Вопрос 114

A typical DME frequency

 

 

Ответы

1                   

1000 kHz

 

2              

MHz

 

3                   

1300 MHz

 

4                   

113,55 MHz

 

Вопрос 115

ICAO specifications are that range errors indicated by Distance Measuring Equipment (DME) should not exceed:

 

 

Ответы

1                   

±0,25 NM plus 3% of the distance measured up to a maximum of 5 NM.

 

2                   

±0,5 NM or 3% of the distance measured whichever is the greater.

 

3                   

±1,25 NM plus 0,25% of the distance measured.

 

4              

±0,25 NM plus 1,25% of the distance measured.

 

Вопрос 116

Given:

 

Aircraft position 34°15'N 098°E, magnetic variation 28°W, FL 280.

 

PTC VOR/DME position 36°12'N 098°E, magnetic variation 13°W.

 

In order to read the most accurate ground speed given by the DME receiver from his present position, the pilot

 

must fly on which PTC radial?

 

 

Ответы

1                   

167°

 

2              

193°

 

3                   

Aircraft will not receive DME information from PTC due to the line of sight rule.

 

4                   

332°

 

 

Вопрос 117

Which one of the statements below is correct regarding the DME?

 

 

Ответы

1                   

The DME ground station is always co-located with a VOR station.

 

2              

The DME operating frequencies are in the UHF frequency band.

 

3                   

Two lines of position obtained from two different DME's give an unambiguous fix.

 

4                   

The indicated distance is the ground distance measured from the aircraft's projected position on the ground to the DME ground installation.

 

Вопрос 118

An enroute DME and VOR that have the same Morse code identification are associated and are:

 

 

Ответы

1              

Within 2000 feet of each other.

 

2                   

within 600 feet of each other.

 

3                   

always co-located.

 

4                   

within 100 feet of each other.

 

Вопрос 119

Of what use, if any, is a military TACAN station to civil aviation?

 

 

Ответы

1                   

It can provide a DME distance and magnetic bearing.

 

2                   

It can provide a magnetic bearing.

 

3                   

It is of no use to civil aviation.

 

4              

It can provide DME distance.

 

Вопрос 120

Distance Measuring Equipment (DME) operates in the:

 

 

Ответы

1                   

UHF band and uses one frequency.

 

2                   

VHF band and uses the principle of phase comparison.

 

3              

UHF band and uses two frequencies.

 

4                   

SHF band and uses frequency modulation techniques.

 

 

Вопрос 121

On a DME, display counters rotating throughout their range indicates:

 

 

Ответы

1                   

the airborne equipment is conducting a frequency search.

 

2                   

airborne equipment failure.

 

3                   

ground equipment failure.

 

4              

The airborne receiver is conducting a range search.

 

Вопрос 122

What is the maximum distance between VOR and DME/TACAN ground installations if they are to have the same

 

Morse code identifier?

 

 

Ответы

1                   

300 m

 

2                   

2000 m

 

3              

M

 

4                   

60 m

 

 

Вопрос 123

During a flight at FL260, a pilot does not receive any DME distance indication from a DME station located

 

approximately 220 NM away. The reason for this is that the:

 

 

Ответы

1              

Aeroplane is below the line of sight altitude.

 

2                   

aeroplane is circling around the station.

 

3                   

range of a DME system is always less than 200 NM.

 

4                   

altitude is too high.

 

 

Вопрос 124

When flying at 6000 ft above ground level the DME indicates 5 NM. What is the horizontal distance from the

 

aircraft to overhead the DME?

 

 

Ответы

1                   

4,6 NM

 

2                   

5,2 NM

 

3              

NM

 

4                   

4,3 NM

 

 

Вопрос 125

Distance Measuring Equipment (DME) operates in the:

 

 

Ответы

1                   

UHF band and is a primary radar system.

 

2                   

SHF band and uses frequency modulation techniques.

 

3              

UHF band and is a secondary radar system.

 

4                   

VHF band and uses the principle of phase comparison.

 

Вопрос 126

A DME that has difficulty obtaining a lock-on: (PRF - Pulse Recurrence Frequency, pps - pulses per second)

 

 

Ответы

1                   

stays in search mode without a reduction in PRF.

 

2              

Stays in search mode but reduces PRF to max. 60 pps after 15000 pulse pairs have been transmitted.

 

3                   

alternates search mode with periods of memory mode lasting 10 seconds.

 

4                   

stays in search mode but reduces PRF to max. 60 pps after 60 seconds.

 

 

Вопрос 127

DME channels utilise frequencies of approximately:

 

 

Ответы

1                   

300 MHz

 

2                   

110 MHz

 

3              

MHz

 

4                   

600 MHz

 

 

Вопрос 128

The time taken for the transmission of an interrogation pulse by a Distance Measuring Equipment (DME) to travel

 

to the ground transponder and return to the airborne receiver was 2000 microseconds. The slant range from the

 

ground transponder was:

 

 

Ответы

1                   

315 NM

 

2                   

296 NM

 

3                   

186 NM

 

4              

NM

 

Вопрос 129

Echo Protection Circuit (ЕРС) function is

 

 

Ответы

1                   

The EPC has to detect if unwanted squitter-pulses are interfering with the wellfunctioning of the i nte rrogator-receive r.

 

2                   

The EPC has to detect if pulse-pairs reflected by the ionosphere are interfering with directly received pulse-pairs.

 

3