ILS – Air – DGCA Question Bank For Politics

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#1. The amplitude modulation and the colour of an outer marker (OM) is:

3000 Hz, blue.

1300 Hz, blue.

400 Hz, blue.

400 Hz, amber.

#2. A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to:

200 feet above the runway threshold.

50 feet above ILS reference point.

Runway surface.

200 feet above the inner marker.

#3. The reason why pre take-off holding areas are sometimes further from the active runway when ILS Category 2 and 3 landing procedures are in progress then during good weather operations is:

Heavy precipitation may disturb guidance signals.

To increase distance from the runway during offset approach operations.

Aircraft manoeuring near the runway may disturb guidance signals.

To increases aircraft aeparation in very reduced visibility conditions.

#4. An aircraft tracking to intercept the Instrument Landing System (ILS) localiser inbound on the approach side, outside the published ILS coverage angle:

Will not normally receive signals.

May receive false course indications.

Will receive signals without identification coding.

Can expect signals to give correct indications.

#5. The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually visually by a series of:

Alternate dots and dashes and an amber light flashing.

Two dashes per second and a blue light flashing.

Dots and a white light flashing.

Dashes and an amber light flashing.

#6. The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of:

200 MHz and is modulated by alternate dot/dash in morse.

75 MHz and is modulated by alternate dot/dash in morse.

300 MHz and is modulated by morse at two dashes per second.

75 MHz and is modulated by more at two dashes per secon.

#7. What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt?

550 FT/MIN.

600 FT/MIN.

800 FT/MIN.

950 FT/MIN.

#8. The outer marker of an ILS with a 3° glide slope is located 4.6 NM from the threshold. Assuming a glide slope height of 50 FT above the threshold, the approximate height of an aircraft passing the outer marker is:

1400 FT.

1350 FT.

1450 FT.

1300 FT.

#9. What is the colour sequence when passing over an Outer, Middle and Inner Marker beacon?

Blue - amber - white.

Amber - white - green.

White - amber -blue.

Blue - green - white.

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

1.35° above the horizontal to 5.25° above the horizontal and 8° each side of the localiser centreline.

0.45° above the horizontal to 1.75° above the glide path and 8° each side of the localiser centreline.

0.7° above and below the glide path and 2.5° each side of the localiser centreline

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

#11. ILS is subject to false glide paths resulting from:

Spurious signals reflected by nearby obstacles.

Multiple lobes of radiation patterns in the vertical plane.

Back-scattering of anternnas.

Ground returns ahead of the antennas.

#12. An aircraft carrying out an ILS approach is receiving more 90 Hz than 150 Hz modulation notes from both the localish and glide transmitters. The ILS indication will show:

Fly left and fly down.

Fly right and fly down.

Fly right and fly up.

Fly left and fly up.

#13. An aircraft carrying out a 3° glide ILS approach experiences a reduction i groudspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately:

250 FT/MIN.

50 FT/MIN

150 FT/MIN.

100 FT/MIN.

#14. The principle of operation of an localiser transmiter is based on two overlapping lobes that are transmitted on (i) .............. frequencies and carry different (ii) ..................

(i) the same (ii) modulation frequencies.

(i) the same (ii) phases.

(i) different (ii) modulation frequencies.

(i) different (ii) phases.

#15. In which frequency band does an ILS glide slope transmit?

VHF.

SHF.

UHF.

EHF.

#16. Assuming a five display, what does each of the dots on either side of the ILS localizer cockpit display represent:

0.5 degrees.

1.5 degrees.

2.5 degrees.

2.0 degrees.

#17. Outer marker transmits on 75 MHz and has an aural frequency of:

1300 Hz.

400 Hz.

2000 Hz.

3000 Hz.

#18. Every 10 kt decrease in groundspeed, on a 3° ILS glidepath, will require an approximate:

Increase in the aircraft's rate of descent of 50 FT/MIN.

Decrease in the aircraft's rate of descent of 50 FT/MIN.

Decrease in the aircraft's rate of descent of 100 FT/MIN.

Increase in the aircraft's rate of descent of 100 FT/MIN.

#19. Instrument Landing System (ILS) Glide Paths provide azimuth coverage (i) __° each side of the localiser centre-line to a distance of (ii) _ NM from thethreshold.

(i) 25 (ii) 17.

(i) 35 (ii) 25.

(i) 5 (ii) 8.

(i) 8 (ii) 10.

#20. The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140 kt is approximately:

800 FT/MIN.

850 FT/MIN.

670 FT/MIN.

700 FT/MIN.

#21. Where, in relation to the runway, is the ILS localiser transmitting aerial normally situated?

At the approach end of the runway about 300 m fro touchdown on the Centrelies.

On the non-approach end of the runway about 300 m from the runway on the extended centreline.

At the non-approach end about 150 m to one side of the runway and 300 m along the extended centreline.

At the approach end about 150 m to out side the runway and 300 m from touchdown.

#22. A Cat III ILS glide path transmitter provides reliable guidance guidance information down to:

A maximum height of 200 ft above the runway.

A maximum height of 100 ft above the runway.

A maximum height of 50 ft above the runway.

The surface of the runway.

#23. Which of the following is an ILS localiser frequency?

108.25 MHz.

109.15 MHz.

110.20 MHz.

112.10 MHz.

#24. Which approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 90kt?

450 FT/MIN.

400 FT/MIN.

600 FT/MIN.

700 FT/MIN.

#25. The heading rose of an HSI is frozen on 200°. Lined up on the ILS of runway 25, the localizer needle will be?

Left of centre.

Right of centre.

Centred with the 'fail' flag showing.

Centred.

#26. What is measured in order to establish aircraft position in relation to the localiser beam on an ILS?

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

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

The bearing of the localiser antenna found by means of a loop antenna.

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

#27. What are the modulation frequencies of the two overlapping lobes that are used on an ILS approach?

90 Hz 150 Hz.

63 MHz 123 MHz.

75 kHz 135 kHz.

328 MHz 335 MHz

#28. Fill scale deflection of the localiser needle indicates that the aircraft is approximately?

2.5 degrees offset from the localiser centreline.

10 degrees offset from the localiser centreline.

1.25 degrees offset from the localiser centreline.

5 degrees offset from the localiser centreline.

#29. On an ILS approach, the localiser needle is fully over to the left. How much deflection does this indicate?

2.5 degrees.

0.7 degrees.

5 degrees.

10 degrees.

#30. False beams on the ILS glide path are?

Only found below the correct glide slope.

Only found if more that 10 degrees left or right of localiser centreline.

Only found if flying the back beam ILS approach.

Only found above the correct glide slope.

#31. The middle market transmits on?

1300 Hz.

1300 MHz.

75 Hz.

75 MHz.

#32. A locator? 1. Is a low powered beacon. 2. Is a high powered beacon. 3. Has range of 10 nm to 25 nm. 4. Has a range of 10 nm to 200 nm.

1 and 4.

2 and 3.

1 and 3.

2 and 4.

#33. According to the ILS coverage areas as defined in ICAO Annex 10, in which of the following situations will the pilot be guaranteed a reliable signal from the localiser?

19 nm from touchdown inbound and 13 degrees displaced from the localiser centreline.

27 nm from touchdown inbound and 8 degrees displaced from the localiser centreline.

10 nm from touchdown inbound and 38 degrees displaced from the localiser centreline.

20 nm from touchdown inbound and 8 degrees displaced from the localiser centreline.

#34. What is measured in order to establish aircraft position in relation to the localiser beam on an ILS?

The difference in phase between the 90 Hz and the 15 Hz modulations.

The difference in depth between the 90 Hz and the 15 Hz modulations.

The difference in time between the 90 Hz and the 15 Hz modulations.

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

#35. Which of the following alternatives is correct regarding audio and visual signals in the cockpit when passing overhead the middle market?

Audio: 74 MHz 2 dots per second. Visual: Blue light flashed.

Audio: 1300 Hz alternating dots and dashes. Visual: Amber light flashes.

Audio: 400 Hz, 2 dashes per second, Visual: Blue light flashes.

Audio: 3000 Hz alternating dots and dashes. Visual: Amber light flashes.

#36. If you are flying a back course ILS, you are flying a?

Non precision approach on the precision approach runway.

Precision approach on the reciprocal runway of the precision approach runway.

Non precision approach on the reciprocal runway of the precision approach runway.

Precision approach on the precision approach runway.

#37. The audio modulation of the middle marker is keyed to give?

Alternating dots and dashed at a rate of 2 dashed per second and 6 dots per second.

Continuous dots at a rate of 6 dots per second.

Continuous dashes at a rate of dashes per second.

A sequence of 3 dashes, 3 dots and 3 dashes every second.

#38. On an ILS approach, the glide slope needle is fully down. How much deflection does this indicate?

0.7 degrees.

2.5 degrees.

5 degrees.

10 degrees.

#39. Full deflection on a glide slope indicator indicates that the aircraft is?

0.7 degrees above or below the correct glide path.

1.25 degrees above or below the correct glide path.

2.5 degrees above or below the correct glide path.

0.5 degrees above or below the correct glide path.

#40. On what carrier frequency does the inner marker transmit?

Same frequency as the glide path.

3000 Hz.

75 MHz.

Same frequency as the localiser.

#41. Assuming a five dot display on either side of the ILS localiser cockpit display. What is the angular displacement of the aircraft from the localiser centreline when the CDI is deflected 2 dots to the right?

1.0 degrees to the left.

1.0 degrees to the right.

2.0 degrees to the right.

2.0 degrees to the left.

#42. Which of the following correctly describes the Instrument Landing System (ILS) localiser rediation pattern?

Two overlapping lobes on the same VHF carrier frequency.

Two overlapping lobes on the same UHF carrier frequency.

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

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

#43. According to ICAO 8168, what is regarded as the maximum safe deviation below the glide path during ILS approaches?

One quarter scale deflection.

Full scale deflection.

Three quarters scale deflection.

Half scale deflection.

#44. Which of these markers has the highest audible frequency?

Outer.

Middle.

Airways.

Inner.

#45. Which of the following is an ILS Localiser frequency?

108.25 MHz.

109.15 MHz.

110.20 MHz.

#46. The heading rose of an HSI is frozen on 200 degrees. Lined up with the ILS of runway 25, the localiser will be?

Right of centre.

Left of centre.

Centred.

Centred with the "Fail" flag showing.

#47. The rate of descent required to maintain a 3.25 degree glide slope at a ground speed of 140 kts is approximately?

670 ft/ min.

700 ft/min.

760 ft/min.

850 ft/min.

#48. An aircraft is flying a 3 degree glide path and experiences a reduction in groundspeed from 150 kts at the outer marker to 120 kts over the threshold. The effect of this change in groundspeed on the aircraft's rate of decent will be decrease of approximately?

50 ft/min.

150 ft/min.

100 ft/min.

250 ft/min.

#49. What is the approximate angular coverage of reliable navigation information for a 3 degree glide path out to a minimum distance of 10 nm?

0.70 degrees above the glide path and 2.5 degrees each side of the localiser centreline.

0.45 degrees above the horizontal to 1.75 degrees above the glide path, and 8 degrees each side of the localiser centreline.

3 degrees above the horizontal to 5.25 degrees above the horizontal, and 8 degrees each side of the localiser centreline.

1.35 degrees above the horizontal to 5.25 degrees above the horizontal, and 8 degrees each side of the localiser centreline.

#50. What according to ICAO Annex 10, is the range of a locator?

100 to 300 nm.

10 to 25 nm.

25 to 50 nm.

50 to 100 nm.

#51. According to ICAO Annex 10, in which frequency band(s) does the locator normally transmit?

MF/HF.

HF.

HF/VHF.

LF/MF.

#52. Which facility associated with the ILS may be identified by a two-letter identification group?

Locator.

Glide Path.

Outer Marker.

Inner Marker.

#53. The ILS marker identified visually by a white flashing light is the?

Outer marker.

Inner marker.

Middle marker.

Locator.

#54. The ILS marker with the higher aural frequency is the?

Inner marker.

Outer marker.

Middle marker.

Locator.

#55. In an ILS system, concerning the glide path principle of operation, the difference in depth of modulation (DDM). 1. Decreases with angular displacement below the glide path. 2. Increases with angular displacement above the glide path. 3. Decrease with angular displacement above the glide path. 4. Increases with angular displacement below the glide path.

2 and 4.

1 and 4.

1 and 3.

2 and 3.

#56. On final on ILS approach, at 0.6 nm from the threshold, which marker are you likely to hear?

The outer marker.

The middle marker.

The inner marker (if available).

#57. Regarding ILS which of the following in true?

All markers transmit at 75 MHz

The glide path transmitter is located 300m from the departure end of the runway.

The DME paried with the ILS channels are usually zero referenced next to the departure end of the runway.

The localiser part of the frequency band is shared with the DME.

#58. The three different markers can be used in the ILS to determine the distance to the ILS touchdown point of the runway as follows?

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

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

The markers are only important in the situation when glide path transmission has ceased.

The middle marker indicates the position for the decision for a missed approach during a CATI approach due to bad visibility.

#59. The UHF band is assigned to the. 1.Locator. 2. Localiser. 3. Outer Marker. 4. Glide Path. The combination regrouping all of the correct statements is?

3 and 4.

1 and 3.

#60. One of the possible disturbances of the ILS signals is "scalloping". Which statement is correct?

Scalloping are minor changes or bends, which can be followed by the aircraft.

Scalloping are minor changes or bends, which cannot be followed by the aircraft.

Scalloping are rapid changes or bends, which can be followed by the aircraft.

Scalloping causes rapid indicator changes from side to side of the intended approach path, which cannot be followed by the aircraft.

#61. The ILS marker identified visually by an amber flashing light is the?

Middle marker.

Outer marker.

Inner marker.

Locator

#62. An ILS marker beacon operates in the?

VHF band.

UHF band.

LF/MF band.

HF band.

#63. If the (angular) displacement of an aircraft (with respect to the localiser centreline) doubles, (e.g. From 1 degree to 2 degrees) measured difference in the depth of modulation?

Doubles.

Remains unchanged.

Is halved.

Increases fourfold.

#64. The ILD marker identified visually by a blue flashing light is the?

Outer marker.

Middle marker.

Inner marker.

Locator.

#65. The ILS marker identified audibly by a series of two dashes per second is the?

Outer marker.

Middle marker.

Inner marker.

Locator.

#66. The ILS marker with an aural frequency of 400 Hz is?

Outer marker.

Inner marker.

Middle marker.

Locator.

#67. The ILS receive of an aircraft flying down the exact runway centreline will receive?

90 Hz and 150 Hz lobes at equal depth.

No modulated signal because the left right lobes cancel each other along the centreline.

The same frequency modulated signal from both lobes with the maximum of magnitude.

The maximum magnitude of the difference between the 90 Hz and the 150 Hz amplitudes.

#68. The ILS receiver of an aircraft on approach and flying on the glide path will receive?

The modulation from both lobes at equal depth.

The same modulation frequency signal from both lobes with the maximum of magnitute.

No modulated signal because the left and right lobes cancel each other along the centreline.

The maximum magnitude of the difference between the two amplitdes.

#69. The principles of operation of an ILS is?

The difference in depth of modulation.

Modulation of the ILS frequency by amplitude of two modulating signals.

The phase comparison.

The difference between the frequencies of the tow tones.

#70. The back CRS of an ILS may give?

Precision approach guidance for the reciprocal of the main approach runway.

Non-precision approach guidance for the main approach runway.

Precision approach guidance for the main approach runway.

Non-precision approach guidance for the reciprocal of the main approach runway.

#71. Which answer states the typical distances along the centreline of the runway of the various ILS components?

Localiser transmitter 300 metres behind end of runway. Glide Path transmitter 300 metres behind the threshold. Middle marker 1000 metres from the threshold. Outer marker 4 nm from the threshold.

Localiser transmitter 300 metres behind end of runway. Glide Path transmitter 300 metres behind the threshold. Middle marker 1.5 nm from the threshold. Outer marker 10 nm from the threshold.

Localiser transmitter 100 metres behind end of runway. Glide Path transmitter 300 metres behind the threshold. Middle marker 1000 metres from the threshold. Outer marker 4 nm from the threshold.

Localiser transmitter 100 metres behind end of runway. Glide Path transmitter 100 metres behind the threshold. Middle marker 1.5 nm from the threshold. Outer marker 10 nm from the threshold.

#72. The ILS marker identified by a series of alternate dots and dashes is the?

Middle marker.

Inner marker.

Outer marker.

Locator.

#73. The ILS marker with the lower aural frequency is the?

Outer marker.

Inner marker.

Middle marker.

Centreline marker.

#74. "Bean bends" in the ILS approach path are?

Curves in the normal approach because of noise abatement.

Curves in the glide path that are visible on the indicator, but change too fats to be followed by large aircraft.

Curved approaches made with the aid of the instrument landing system.

Slight curves that can be followed by large aircraft.

#75. Locatory are?

LF/MF NDBs used as an aid for the approach.

Low powered ADFs use for airfield or runway approach.

Beacons with a range of 10 to 250 nm.

High powered NDBs used for en route and airway navigation.

#76. The UHF band is the assigned frequency band of the?

ILS glide path transmitter.

All the 3 ILS marker beacons.

ILS localiser transmitter.

Outer marker beacon.

#77. The UHF band is the assigned frequency band of the?

ILS glide path transmitter.

All the 3 ILS marker beacons.

ILS localiser transmitter.

Outer marker beacon.

#78. Performing an ILS approach, you will fly overhead the markers in a specific order. The order is?

OM, IM (if available), MM.

OM, MM, IM (if available).

MM, IM, (if available) , OM.

IM (if available), MM, OM.

#79. The type of modulation used for the ILS frequency carrier is?

Amplitude modulation.

Phase modulation.

Dual modulation.

Frequency modulation.

#80. In an ILS, concerning the localiser principle of operation, the difference in depth of modulation (DDM) will?

Increase with displacement from the centreline.

Decrease with displacement from the centreline.

Increase with left displacement from the centreline, and decrease with right displacement from the centreline.

Increase from centre position to half full scale of the needle of the indicator and decrease until full scale of the needle.

#81. In an ILS, concerning the glide path principle of operation, the difference in depth of modulation (DDM) will?

Increase with displacement above or below the glide path.

Decrease with displacement above or below the glide path.

Increase with above displacement from the glide path, and decrease with displacement below the glide path.

Increase from centre position to half full scale of the needle of the indicator and decrease until full scale of the needle.

#82. The ILS outer marker modulation frequency is?

400 Hz.

3000 Hz.

1500 Hz.

1300 Hz.

#83. On final on an ILS approach you are flying overhead the outer marker. You can expect to be at?

4 nm from the threshold.

25 nm from the threshold.

10 nm from the threshold.

1 nm from the threshold.

#84. The basic principle of operation of the ILS is the difference in depth of modulation (DDM) between the two lobes. 1.If the aircraft strays right, the higher tone lobe will be received at a higher intensity than the lower tone lobe. 2. A DDM of zero indicates the exact runway centreline. 3. The depth of modulation increases away from the centreline. 4. A DDM of zero indicates a balance between modulations. The combination that regroups all of the correct statements is?

1, 2, 3 and 4.

1 and 3.

2, 3 and 4.

2 and 3.

#85. The basic principle of operation of the ILS is the difference in depth of modulation (DDM) between the 90 Hz and the 150 Hz lobes. A DDM of zero indicates: 1. The higher tone lobe is received at a higher strength than the lower the lobe. 2. The exact runway centreline. 3. Aircraft is on the glide path. 4. A balance between modulations.

1, 2 and 4.

1 and 3.

2 and 3.

2, 3 and 4.

#86. Which of the following list use the VHF band? 1. Locator. 2. Localiser. 3. Outer Marker. 4. Glide path. The combination that regroups all the correct statements is?

2 and 3.

2 and 4.

1, 2, 3 and 4.

1 and 3.

#87. The audio frequency modulation of the middle marker shall be keyed as follows?

A continuous series of alternate dots and dashes, the dashes keyed at a rate of 2 dashes per second, and the dots keyed at a rate of 6 dots per second.

2 dashes per second continuously.

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

6 dots per second continuously.

#88. The localiser transmitters operate in a frequency band between?

108 MHz and 111.985 MHz

111. 975 MHz and 117.975 MHz.

329015 MHz and 335 MHz.

108 MHz and 117.975 MHz.

#89. The ILS inner marker (if available) modulation frequency is?

3000 Hz.

1300 Hz.

240 Hz.

400 Hz.

#90. According to ICAO Annex 10 a locator has a range of?

75 to 250 nm.

10 to 25 nm.

75 to 150 nm.

7.5 to 15 nm.

#91. The ILS middle marker modulation frequency is?

1300 Hz.

3000 Hz.

400 Hz.

800 Hz.

#92. Inner marker beacon of an ILS transmit at?

75 MHz.

150 MHz.

90 Hz.

It depends on the modulating frequency.

#93. All ILS marker beacons transmit at?

75 MHz.

150 MHz.

90 MHz

It depends on the modulating frequency.

#94. Middle marker beacon of an ILS transmit at?

75 MHz.`

150 MHz.

90 Hz.

It depends on the modulating frequency.

#95. ILS produces?

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

A radiation pattern which is amplitude modulated by a 90 Hz and a 15 Hz signal.

Two lobes modulated in frequency by 90 Hz and 150 Hz signals.

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

#96. The ILS receiver of an aircraft on approach and flying on the right of the exact runway centreline will receive?

The left lobe modulation only.

The modulation from both lobes at equal amplitude.

A modulated signal and will shift the localiser needle to the right according to the magnitude of the difference between the two amplitudes.

More 150 Hz localiser signal than the 90 Hz localiser signal.

#97. On an ILS approach, when flying overhead the middle marker the colour of the flashing light will be?

Amber.

Blue.

Green.

White.

#98. On an ILS approach, when flying overhead the middle marker the colour of the flashing light will be?

White.

Blue.

Green.

Amber.

#99. A VOR is situated at the far end of the runway on which an aircraft is making an ILS approach. Nav 1 is switched to the localiser frequency and Nav 2 to the VOR frequency. At the moment that the needle of #1 indicator reaches the outer dot the deflection needle of #2 indicator will be at?

Approximately a halfway the scale.

The outer dot.

Approximately a three quarters of the scale.

Approximately a quarter of the scale.

#100. On an ILS approach, when flying overhead the outer marker the colour of the flashing light will be?

Blue.

Green.

White.

Amber.

#101. 108.35 MHz can only be?

An ILS frequency.

A VOR frequency.

An ATC frequency.

A NDB frequency.

#102. Outer marker beacon of an ILS transmit at?

75 MHz.

150 MHz.

90 Hz.

It depends on the modulating frequency.

#103. The audio frequency modulation of the outer marker shall be keyed as follows?

2 dashes per second continuously.

A continuous series of alternate dots and dashes.

6 dots per second. Continuously.

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

#104. The audio frequency modulation of the inner marker shall be keyed as follows?

6 dots per second. Continuously.

A continuous series of alternate dots and dashes.

2 dashes per second continuously.

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

#105. The localiser transmits in?

The VHF band.

The UHF band.

Both the UHF and the VHF bands.

The HF band.

#106. The transmission of the glide slope beacon is characterised by?

UHF frequency with a minimum range of 10 nm.

300 to 3000 Hz Amplitude Modulation fro the ATIS.

UHF carrier frequency with a possible "voice ident".

VHF frequency modulated with a 90 Hz AM and 150 Hz AM navigation signal.

#107. Classify the marker from lower aural frequency to higher aural frequency: 1. Inner marker ( if available). 2. Middle marker. 3. Outer marker.

3, 2, 1.

1, 3, 2.

2, 1, 3.

1, 2, 3.

#108. Locators are: 1. High powered NDBs used for en route and airways. 2. Low powered NDBs used for airfield airfield runway approach. 3. Beacons with a usually range of 10 to 250 nm. 4. Beacons with a usually range of 10 to 25 nm. The combination regrouping all of the correct statements is?

2 and 3.

1 and 4.

1 and 3.

2 and 4.

#109. Concerning the localiser principle of operation in an ILS, the difference in depth of modulation(DDM): 1. Decreases with respect to the angular displacement from the centreline. 2. Increases with right displacement from the cenreline. 3. Decreases with left displacement from the centreline. 4. Increases linearly with displacement from the centreline. The combination regrouping all of the correct statements is?

2 and 4.

1 and 4.

1 and 3.

2 and 3.

#110. What is the function of the FM-immune filter?

To make the ILS localiser receiver less susceptible to interference from earth-reflected localiser signals.

To make both the ILS localiser and the glide slope receiver less susceptible to interference from earth-reflected localiser signals.

To make both the ILS localiser and the glide slope receiver less susceptible to interference from commercial FM-stations (radio and television).

To make the ILS localiser receiver less susceptible to interference from commercial FM-stations (radio and television).

#111. A locator beacon differs from an NDB with respect to: 1. Operational use. 2. Transmission power. 3. Presentation in the cockpit. 4. Frequency band. From the above stated differences the following numbers are correct?

1 and 4.

1 and 2.

2, 3 and 4.

1, 2 and 3.

#112. ILS transmitters use the?

UHF and VHF bands.

VHF, UHF, and HF bands.

VHF band only.

UHF band only.

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

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

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

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

These transmissions may interfere with the ILS localiser signal which may lead to erroneous deviation indications.

#114. Concerning the localiser principle of operation in an ILS, the needle of the aircraft indicator is centred when the difference in depth of modulation (DDM) is?

Null.

More than 150 Hz.

Maximum.

Less than 90 Hz.

#115. Concerning the glide path principle of operating in an ILS, the needle of the aircraft indicator is centred when the difference in depth of modulation (DDM) is?

Null.

More than 150 Hz.

Maximum.

Less than 90 Hz.

#116. An ILS receiver?

Measures the difference in depth of modulation of the transmitted signals.

Measures the phase difference of the transmitted signals.

Measures the difference in frequency of modulation of the transmitted signals.

Measures the phase rotation of the transmitted signals.

#117. The ILS marker with an aural frequency of 3000 Hz is the?

Inner marker (if availale)

Middle marker.

Outer marker.

Centreline marker.

#118. The ILS marker identified by a series of dots (6/sec) is the?

Inner marker.

Outer marker.

Middle marker.

Locator.

#119. The ILS marker with an aural frequency of 1300 Hz is the?

Middle marker.

Outer marker.

Inner marker.

Locator.

Finish

Dgca Question Bank For Pilots

Results

#1. The amplitude modulation and the colour of an outer marker (OM) is:

#2. A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to:

#3. The reason why pre take-off holding areas are sometimes further from the active runway when ILS Category 2 and 3 landing procedures are in progress then during good weather operations is:

#4. An aircraft tracking to intercept the Instrument Landing System (ILS) localiser inbound on the approach side, outside the published ILS coverage angle:

#5. The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually visually by a series of:

#6. The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of:

#7. What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt?

#8. The outer marker of an ILS with a 3° glide slope is located 4.6 NM from the threshold. Assuming a glide slope height of 50 FT above the threshold, the approximate height of an aircraft passing the outer marker is:

#9. What is the colour sequence when passing over an Outer, Middle and Inner Marker beacon?

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

#11. ILS is subject to false glide paths resulting from:

#12. An aircraft carrying out an ILS approach is receiving more 90 Hz than 150 Hz modulation notes from both the localish and glide transmitters. The ILS indication will show:

#13. An aircraft carrying out a 3° glide ILS approach experiences a reduction i groudspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately:

#14. The principle of operation of an localiser transmiter is based on two overlapping lobes that are transmitted on (i) .............. frequencies and carry different (ii) ..................

#15. In which frequency band does an ILS glide slope transmit?

#16. Assuming a five display, what does each of the dots on either side of the ILS localizer cockpit display represent:

#17. Outer marker transmits on 75 MHz and has an aural frequency of:

#18. Every 10 kt decrease in groundspeed, on a 3° ILS glidepath, will require an approximate:

#19. Instrument Landing System (ILS) Glide Paths provide azimuth coverage (i) __________° each side of the localiser centre-line to a distance of (ii) _________ NM from thethreshold.

#20. The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140 kt is approximately:

#21. Where, in relation to the runway, is the ILS localiser transmitting aerial normally situated?

#22. A Cat III ILS glide path transmitter provides reliable guidance guidance information down to:

#23. Which of the following is an ILS localiser frequency?

#24. Which approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 90kt?

#25. The heading rose of an HSI is frozen on 200°. Lined up on the ILS of runway 25, the localizer needle will be?

#26. What is measured in order to establish aircraft position in relation to the localiser beam on an ILS?

#27. What are the modulation frequencies of the two overlapping lobes that are used on an ILS approach?

#28. Fill scale deflection of the localiser needle indicates that the aircraft is approximately?

#29. On an ILS approach, the localiser needle is fully over to the left. How much deflection does this indicate?

#30. False beams on the ILS glide path are?

#31. The middle market transmits on?

#32. A locator? 1. Is a low powered beacon. 2. Is a high powered beacon. 3. Has range of 10 nm to 25 nm. 4. Has a range of 10 nm to 200 nm.

#33. According to the ILS coverage areas as defined in ICAO Annex 10, in which of the following situations will the pilot be guaranteed a reliable signal from the localiser?

#34. What is measured in order to establish aircraft position in relation to the localiser beam on an ILS?

#35. Which of the following alternatives is correct regarding audio and visual signals in the cockpit when passing overhead the middle market?

#36. If you are flying a back course ILS, you are flying a?

#37. The audio modulation of the middle marker is keyed to give?

#38. On an ILS approach, the glide slope needle is fully down. How much deflection does this indicate?

#39. Full deflection on a glide slope indicator indicates that the aircraft is?

#40. On what carrier frequency does the inner marker transmit?

#41. Assuming a five dot display on either side of the ILS localiser cockpit display. What is the angular displacement of the aircraft from the localiser centreline when the CDI is deflected 2 dots to the right?

#42. Which of the following correctly describes the Instrument Landing System (ILS) localiser rediation pattern?

#43. According to ICAO 8168, what is regarded as the maximum safe deviation below the glide path during ILS approaches?

#44. Which of these markers has the highest audible frequency?

#45. Which of the following is an ILS Localiser frequency?

#46. The heading rose of an HSI is frozen on 200 degrees. Lined up with the ILS of runway 25, the localiser will be?

#47. The rate of descent required to maintain a 3.25 degree glide slope at a ground speed of 140 kts is approximately?

#48. An aircraft is flying a 3 degree glide path and experiences a reduction in groundspeed from 150 kts at the outer marker to 120 kts over the threshold. The effect of this change in groundspeed on the aircraft's rate of decent will be decrease of approximately?

#49. What is the approximate angular coverage of reliable navigation information for a 3 degree glide path out to a minimum distance of 10 nm?

#50. What according to ICAO Annex 10, is the range of a locator?

#51. According to ICAO Annex 10, in which frequency band(s) does the locator normally transmit?

#52. Which facility associated with the ILS may be identified by a two-letter identification group?

#53. The ILS marker identified visually by a white flashing light is the?

#54. The ILS marker with the higher aural frequency is the?

#56. On final on ILS approach, at 0.6 nm from the threshold, which marker are you likely to hear?

#57. Regarding ILS which of the following in true?

#58. The three different markers can be used in the ILS to determine the distance to the ILS touchdown point of the runway as follows?

#59. The UHF band is assigned to the. 1.Locator. 2. Localiser. 3. Outer Marker. 4. Glide Path. The combination regrouping all of the correct statements is?

#60. One of the possible disturbances of the ILS signals is "scalloping". Which statement is correct?

#61. The ILS marker identified visually by an amber flashing light is the?

#62. An ILS marker beacon operates in the?

#63. If the (angular) displacement of an aircraft (with respect to the localiser centreline) doubles, (e.g. From 1 degree to 2 degrees) measured difference in the depth of modulation?

#64. The ILD marker identified visually by a blue flashing light is the?

#65. The ILS marker identified audibly by a series of two dashes per second is the?

#66. The ILS marker with an aural frequency of 400 Hz is?

#67. The ILS receive of an aircraft flying down the exact runway centreline will receive?

#68. The ILS receiver of an aircraft on approach and flying on the glide path will receive?

#69. The principles of operation of an ILS is?

#70. The back CRS of an ILS may give?

#71. Which answer states the typical distances along the centreline of the runway of the various ILS components?

#72. The ILS marker identified by a series of alternate dots and dashes is the?

#73. The ILS marker with the lower aural frequency is the?

#74. "Bean bends" in the ILS approach path are?

#75. Locatory are?

#76. The UHF band is the assigned frequency band of the?

#77. The UHF band is the assigned frequency band of the?

#78. Performing an ILS approach, you will fly overhead the markers in a specific order. The order is?

#79. The type of modulation used for the ILS frequency carrier is?

#19. Instrument Landing System (ILS) Glide Paths provide azimuth coverage (i) __° each side of the localiser centre-line to a distance of (ii) _ NM from thethreshold.