Dashes per second continuously.

 

2                   

6 dots per second continuously.

 

3                   

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

 

4                   

a continuous series of alternate dots and dashes.

 

Вопрос 164

What is measured in order to establish aircraft position in relation to the localizer beam on an ILS?

 

 

Ответы

1              

The difference in depth between the 90 Hz modulation and the 150 Hz modulation.

 

2                   

The difference in time between the 90 Hz modulation and the 150 Hz modulation.

 

3                   

The difference in phase between the 90 Hz modulation and the 150 Hz modulation.

 

4                   

The bearing to the localizer antenna found by means of a loop antenna.

 

 

Вопрос 165

Three different markers can be used in the ILS to determine the distance to the ILS touchdown point of the runway as follows:

 

 

Ответы

1                   

The markers are only important in the situation when the Glide Path transmission has ceased.

 

2              

The middle marker indicates the position for the decision for a missed approach during a CAT I approach due too bad visibility.

 

3                   

The outer marker indicates the position where normally the descent has to commence.

 

4                   

The inner marker warns the pilot of the last chance to commence the missed approach procedure.

 

 

Вопрос 166

What is the effect of FM broadcast stations that transmit on frequencies just below 108 MHz on the performance of ILS.

 

 

Ответы

1                   

These transmissions may activate the FM immune filter which results in the appearance of the localizer failure flag.

 

2              

These transmissions may interfere with the ILS localizer signal which may lead to erroneous localizer deviation indication.

 

3                   

These transmissions may activate the FM immune filter which results in the appearance of the localizer and glide path failure flag.

 

4                   

These transmissions may interfere with the ILS localizer and glide path signals which may lead to erroneous deviation indications.

 

Вопрос 167

Which of the following correctly describes the Instrument Landing System (ILS) localiser radiation pattern?

 

 

Ответы

1                   

Two overlapping lobes on the same UHF carrier frequency.

 

2              

Two overlapping lobes on the same VHF carrier frequency.

 

3                   

A pencil beam comprising a series of smaller beams each carrying a different modulation.

 

4                   

Two overlapping lobes on different radio carrier frequencies but with the same modulation.

 

 

Вопрос 168

108.55 MHz can only be:

 

 

Ответы

1                   

a NDB frequency.

 

2                   

an АТС frequency.

 

3              

An ILS frequency.

 

4                   

a VOR frequency.

 

Вопрос 169

An aircraft carrying out a 3° glide path ILS approach experiences a reduction in ground speed from 150 kts at the outer marker to 100 kts

 

over the threshold. The effect of this change in ground speed on the aircraft's rate of descent will be a decrease of approximately:

 

 

Ответы

1                   

150 ft/min.

 

2              

Ft/min.

 

3                   

100 ft/min.

 

4                   

50 ft/min.

 

Вопрос 170

ILS marker identified audibly by a series of alternate dots and dashes:

 

 

Ответы

1                   

locator.

 

2                   

outer marker.

 

3              

Middle marker.

 

4                   

inner marker.

 

Вопрос 171

Middle marker beacons of an ILS transmit at:

 

 

Ответы

1                   

1300 Hz.

 

2              

MHz.

 

3                   

150 MHz.

 

4                   

90 MHz.

 

 

Вопрос 172

ILS receiver of an aircraft on approach and flying on the glidepath will receive:

 

 

Ответы

1              

The modulation from both lobes at equal depth.

 

2                   

the same modulation frequency signals from both lobes with the maximum of magnitude.

 

3                   

the maximum magnitude of the difference between the two amplitudes.

 

4                   

no modulated signal because the two lobes cancel each other along the centerline.

 

 

Вопрос 173

Which range facility associated with the ILS may be identified by a two-letter identification group

 

 

Ответы

1                   

Outer marker.

 

2              

Locator.

 

3                   

Glide path.

 

4                   

Inner marker.

 

Вопрос 174

On what carrier frequency does the inner marker transmit?

 

 

Ответы

1                   

Same frequency as the glide path.

 

2                   

3000 Hz.

 

3                   

Same frequency as the localizer.

 

4              

MHz.

 

 

Вопрос 175

Instrument Landing Systems (ILS) Glide Paths provide azimuth coverage (i) each side of the localiser centerline to a distance of (ii) NM

 

from the threshold.

 

 

Ответы

1                   

i) 35°; ii) 25.

 

2              

i) 8°; ii) 10.

 

3                   

i) 25°; ii) 17.

 

4                   

i) 5°; ii) 8.

 

 

Вопрос 176

What is the approximate angular coverage of reliable navigation information for a 3° ILS glide path out to a distance of 10 NM?

 

 

Ответы

1                   

3° above and below the glide path and 10° each side of the localiser centerline.

 

2                   

0,45° above the horizontal to 1,75° above the glide path and 8° each side of the localiser centerline.

 

3              

1,35° above the horizontal to 5,25° above the horizontal and 8° each side of the localiser centerline.

 

4                   

0,7° above and below the glide path and 2,5° each side of the localiser centerline.

 

 

Вопрос 177

Localiser transmits in:

 

 

Ответы

1                   

both UHF and VHF bands.

 

2                   

the UHF band.

 

3              

The VHF band.

 

4                   

the HF band.

 

 

Вопрос 178

The ILS marker identified visually by an amber flashing light is the:

 

 

Ответы

1              

Middle marker.

 

2                   

locator.

 

3                   

inner marker.

 

4                   

outer marker.

 

 

Вопрос 179

ILS outer marker modulation frequency is:

 

 

Ответы

1                   

1500 Hz.

 

2                   

3000 Hz.

 

3                   

1300 Hz.

 

4              

Hz.

 

Вопрос 180

Concerning the glidepath principle of operation in an ILS system, the needle of the indicator is centred when the difference in depth of

 

modulation (DDM) is:

 

 

Ответы

1              

Null.

 

2                   

150 Hz or 90 Hz.

 

3                   

less than 90 Hz.

 

4                   

maximum.

 

 

Вопрос 181

ILS marker with an aural frequency of 400 Hz

 

 

Ответы

1                   

inner marker.

 

2              

Outer marker.

 

3                   

locator.

 

4                   

middle marker.

 

 

Вопрос 182

Which of the following is correct regarding false beams on the ILS glide path?

 

 

Ответы

1