False beams will only be found above the correct glide path.

 

2                   

False beams will only be found below the correct glide path.

 

3                   

False beams are only present when flying a back-beam ILS approach.

 

4                   

False beams will only be found more than 10° to the left or to the right of the localiser centreline.

 

Вопрос 183

In an ILS system,concerning the glidepath principle of operation, the difference in depth of modulation (DDM):

 

1) Decrease with angular displacement below the glidepath.

 

2) Decrease with angular displacement above the glidepath.

 

3) Increase with angular displacement above the glidepath.

 

4) Increase with angular displacement below the glidepath.

 

The combination regrouping all the correct statements is:

 

 

Ответы

1              

3,4

 

2                   

1,4

 

3                   

1,3

 

4                   

2,4

 

 

Вопрос 184

ILSproduces:

 

 

Ответы

1                   

a radiation pattern which is amplitude modulated by the VHF frequency of the ILS.

 

2              

A radiation pattern which is amplitude modulated by a 90 Hz and a 150 Hz signal.

 

3                   

а 90 Hz lobe and a 150 Hz lobe which are amplitude modulated by the VHF frequency of the ILS.

 

4                   

two lobes modulated in frequency by a 90 Hz and a 150 Hz signal.

 

 

Вопрос 185

ILS marker with an aural frequency of 1300 Hz is the:

 

 

Ответы

1                   

outer marker.

 

2              

Middle marker.

 

3                   

locator.

 

4                   

inner marker.

 

 

Вопрос 186

ILS marker identified visually by an blue flashing light is the:

 

 

Ответы

1                   

locator.

 

2              

Outer marker.

 

3                   

inner marker.

 

4                   

middle marker.

 

 

Вопрос 187

On an ILS approach, when flying overhead the outer marker the color of the flashing light will be:

 

 

Ответы

1              

Blue.

 

2                   

green.

 

3                   

amber.

 

4                   

white.

 

 

Вопрос 188

ILS is subject to false glide paths resulting from:

 

 

Ответы

1                   

back-scattering of antennas.

 

2              

Multiple lobes of radiation patterns in the vertical plane.

 

3                   

ground returns ahead of the antennas.

 

4                   

spurious signals reflected by nearby obstacles.

 

 

Вопрос 189

Audio frequency modulation of the inner marker (if available) shall be keyed as follows:

 

 

Ответы

1                   

a continuous series of alternate dots and dashes.

 

2              

Dots per second continuously.

 

3                   

3 dashes, 3 dots and 3 dashes per second continuously.

 

4                   

2 dashes per second continuously.

 

 

Вопрос 190

Microwave Landing System (MLS) uses the following wavelengths:

 

 

Ответы

1                   

hectometric

 

2              

Centimetric

 

3                   

myriametric

 

4                   

metric

 

Вопрос 191

In which frequency band does the Microwave Landing System (MLS) operate?

 

 

Ответы

1                   

UHF

 

2                   

VHF

 

3              

SHF

 

4                   

EHF

 

 

Вопрос 192

The azimuth transmitter of a Microwave Landing System (MLS) provides a fan-shaped horizontal approach

 

zone which is usually:

 

 

Ответы

1                   

±60° of the runway centre-line.

 

2              

±40° of the runway centre-line.

 

3                   

±30° of the runway centre-line.

 

4                   

±50° of the runway centre-line.

 

Вопрос 193

Microwave Landing Systems allow the aircraft to fix its position accurately in three dimensions by means of:

 

 

Ответы

1                   

directional aerials and DME.

 

2                   

timing the interval between pulses in azimuth and elevation and timing the delay for pulses to reach the aircraft to define range

 

3                   

information from four satellites transmitting microwaves.

 

4              

Timing the passage of two scanning beams from transmitters co-located with DME.

 

Вопрос 194

MLS installations notified for operation, unless otherwise stated, provide azimuth coverage of:

 

 

Ответы

1                   

±40° about the nominal courseline out to a range of 30 NM.

 

2                   

±20° about the nominal courseline out to a range of 10 NM.

 

3              

±40° about the nominal courseline out to a range of 20 NM.

 

4                   

±20° about the nominal courseline out to a range of 20 NM.

 

 

Вопрос 195

The addition of DME-P to MLS is necessary to:

 

 

Ответы

1                   

allow linear approaches.

 

2                   

support the time referenced scanning beam.

 

3                   

assure a constant angular velocity of the azimuth and elevation sweep.

 

4              

Obtain three dimensional positions.

 

Вопрос 196

MLS not equipped with DME P:

 

 

Ответы

1                   

provides the capability for CAT III approaches.

 

2                   

provides the capability for curved approaches but not of segmented approaches.

 

3                   

provides the capability for segmented approaches but of not curved approaches.

 

4              

Provides basically the same approach capabilities as ILS.

 

 

Вопрос 197

Scanning beam of the MLS system called:

 

 

Ответы

1                   

angle reference scanning beam (ARSB).

 

2                   

phase reference scanning beam (PRSB).

 

3              

Time reference scanning beam (TRSB).

 

4                   

frequency reference scanning beam (FRSB).

 

 

Вопрос 198

MLS is primarily being installed at airports where:

 

 

Ответы

1                   

the main approach paths lead over water.

 

2