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CPL Test Series
Question Bank
Questions for R* B*LI ILS
Answer the following questions
Test Mode
Training Mode
1. Every 10ktt decrease in groundspeed, on a 3°ILS glide path, will require an approximate
increase in the aircraft's rate of descent of 50ft/min
increase in the aircraft's rate of descent of 100ft/min
decrease in the aircraft's rate of descent of 50ft/min
2. At 0430 an aircraft is in level cruise flight at groundspeed of 350 knots, at FL370, 165 nm from a VOR. It is required to descend at a mean rate of 1800 feet/ min, to be at FL 80 overhead the VOR. What is the latest time to commence descent, if the mean ground speed in the descent is to be 200 knots?
0439.
0449.
0456.
3. The sensitive area of an ILS is the area aircraft may not enter when
category II/III ILS operations are in progress.
category I ILS operations are in progress.
ILS operations are in progress.
4. The principle of operation of an ILS Localiser transmitter is based on two overlapping lobes that are transmitted on (i) _____ frequencies and carry different (ii) _______
(i) different (ii) phases
(i) the same (ii) modulation frequencies
(i) different (ii) modulation frequencies
5. Assuming zero wind, what distance is covered by an aircraft descending 15000 FT with a TAS of 320 kt and maintaining a rate of descent of 3000 FT/MIN?
16.0 NM.
26.7 NM.
19.2 NM.
6. Instrument Landing System (ILS) Glide Paths provide azimuth coverage (i) _____° each side of the localiser center line to a distance of (ii) ______ NM from the threshold
(i) 25 (ii) 17
(i) 8 (ii) 10
(i) 35 (ii) 25
7. On an ILS ROD is function of
EAS
IAS
G/S
8. An aircraft flying down a 3° ILS glide slope is at 25 nm DME rom the threshold. Using the 1 in 60 rule and approximating 1 nm to 6000 ft, calculate the aircraft height above the runway threshold, assuming that the ILS glide path crosses the threshold at height of 50 ft?
7550 ft.
6450 ft.
7455 ft.
9. The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140kt is approximately
670ft/min
850ft/min
800ft/min
10. The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually by a series of
dots and a white light flashing
two dashes per second and a blue light flashing
alternate dots and dashes and an amber light flashing
11. What approximately rate of descent is required in order to maintain a 3° glide path at a groundspeed of 90kt?
700ft/min
400ft/min
450ft/min
12. Category II ILS provides accurate guidance to
150 ft above the horizontal plane containing the threshold.
100 ft above the horizontal plane containing the threshold.
125 ft above the horizontal plane containing the threshold.
13. An aircraft carrying out a 3° glide path ILS approach experiences a reduction in Ground speed from 150kt at the outer marker to 120kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately
100ft/min
50ft/min
150ft/min
14. The visual Indication of passing the outer marker is a ____ light with a series of ____ at 400 Hz
blue; dashes
blue; dots
white; dashes
15. Inner marker transmits on 75MHz and has an aural frequency of
400Hz
2000Hz
3000Hz
16. Which of the following is an ILS localiser frequency?
109.15MHz
110.20MHz
112.10MHz
17. A Cat III ILS glide path transmitter provides reliable guidance information down to
a maximum height of 50 ft above the runway
the surface of the runway
a maximum height of 200 ft above the runway
18. The inner marker of an ILS installation identifies itself with
Dots and dashes with alternating an amber light.
alternating dots and dashes with a white light.
continuous dots with a white light.
19. In which frequency band does an ILS glide slope transmit?
VHF
EHF
UHF
20. At a distance of 20 NM from the localizer transmitter, the horizontal extent of the localizer coverage is
+/- 10 NM wide.
+/- 10° from the runway extended center line.
+/- 2, 5°
21. An aircraft at FL370 is required to commence descent when 100 NM from a DME facility and to cross the station at FL120. If the mean GS during the descent is 396 kt, the minimum rate of descent required is approximately?
1000 FT/MIN.
1650 FT/MIN.
2400 FT/MIN
22. When can an ILS back beam be received
Never
When flying in the area behind the localiser aerial.
When flying in the area forward the localiser aerial.
23. Given: TAS = 197 Kt, True course = 240°, W/V = 180/30 kt. Descent is initiated at FL 220 and completed at FL 40. Distance to be covered during descent is 39 NM. What is the approximate rate of descent?
1400 FT/MIN.
800 FT/MIN.
950 FT/MIN.
24. What is the approximate angular coverage of reliable navigation information for a 3° ILS glide path out to a distance of 10NM?
1.35° above the horizontal to 5.25° above the horizontal and 8° each side of the localiser centerline
0.7° above and below the glide path and 2.5° each side of the localiser centerline
3° above and below the glide path and 10° each side of the localiser centerline
25. At what approximate distance from the threshold would an aircraft intercept the glide path if the aircraft height is 2500 feet, and the ILS glide path angle is 3° ?
7.0 nm
13.0 nm
7.8 nm
26. If there is a 15 knot increase in headwind by what amount must the rate of descent be changed in order to maintain a 3° glide slope?
It must be increased by 35 ft/ min.
It must be decreased by 79 ft/ min.
It must be increased by 79 ft/ min.
27. What will be the rate of descent when flying down a 7% glide slope, at a groundspeed of 250 knots?
1773 ft/min.
1737 ft/min.
1575 ft/min.
28. If there is a 12 knot increase in headwind by what amount must the rate of descent be changed in order to maintain a 3° glide slope?
It must be decreased by 61 ft/ min.
It must be decreased by 35 ft/ min.
It must be increased by 35 ft/ min.
29. The upper limit of the vertical coverage of the localizer must be
not less than 7° above the horizontal (drawn from the localizer).
not less than 600 m above the horizontal.
Not less than 300 m above the highest point on the approach.
30. Convert 70 meters/ second into knots?
35 kts.
55 kts
136 kts.
31. 850 FT/MIN equals?
4.3 m/sec.
4.6 m/sec.
5.2 m/sec.
32. 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
will receive signals without identification coding
may receive false course indications
33. The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of
75MHz and is modulated by morse at two dashes per second
300MHz and is modulated by morse at two dashes per second
200MHz and is modulated by alternate dot/dash in morse
34. At 0422 an aircraft at FL370, GS 320kt, is on the direct track to VOR 'X' 185 NM distant. The aircraft is required to cross VOR 'X' at FL80. For a mean rate of descent of 1800 FT/MIN at a mean GS of 232 kt, the latest time at which to commence descent is?
0454.
0451.
0445.
35. What is the colour sequence when passing over an Outer, Middle and Inner Marker beacon?
amber - white - green
Blue - amber - white
Blue - green - white
36. The minimum angle at which a false glide path is likely to be encountered on a 3° glide path is
1.75°
6°
5.35°
37. The outer marker of an ILS with a 3° glide slope is located 4.6NM from the threshold. Assuming a glide slope height of 50ft above the threshold, the approximate height of an aircraft passing the outer marker is
1300ft
1350ft
1450ft
38. A typical ILS glide path frequency, in MHz , is
110.30
329.30
75.00
39. The amplitude modulation and the colour of an outer marker (OM) is
1300Hz, blue
400Hz, blue
400Hz, amber
40. ILS is subject to false glide paths resulting from
back-scattering of antennas
ground returns ahead of the antennas
multiple lobes of radiation patterns in the vertical plane
41. On an ILS approach you receive more of the 90 Hz modulation than the 150 Hz modulation. The action you should take is
fly right and down
Fly right and up
Fly left and up.
42. In an ILS system, the identification
Is transmitted in morse by the localizer transmitter with a tone of 1020 Hz.
Is transmitted by the localizer and the glide path transmitters.
Is transmitted with a tone of 1450 Hz.
43. In full ILS system which marker is optional?
Outer
Inner
Middle
44. Assuming a five dot display, what does each of the dots on either side of the ILS localizer cockpit display represent
0.5 degrees
2.5 degrees
2.0 degrees
45. A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to
runway surface
200ft above the runway threshold
50ft above ILS reference point
46. The rate of descent in feet per minute, appropriate to a 3.2° ILS glide path at an approach groundspeed of 110 kts is
586 fpm
666 fpm
563 fpm
47. The horizontal deviation on the expanded ILS display represented by one dot is approximately
2°
0.5°
1°
48. Where, in relation to the runway, is the ILS locallser transmitting aerial normally situated?
At the approach end about 150m to one side of the runway and 300m from touchdown
On the non-approach end of the runway about 300m from the runway on the extended centerline
At the non-approach end about 150m to one side of the runway and 300m along the\extended centerline
49. For a 2.7 degree glide path on a Category 1 ILS the vertical coverage is
1.22° - 4.73°
2.05° - 5.55°
1.35° - 5.25°
50. The reason why pre take-off holding areas are sometimes further from the active runway when ILS Category II and III landing procedures are in progress than during good weather operations is
to increase distance from the runway during offset approach operations
To increase aircraft separation in very reduced visibility conditions
aircraft maneuvering near the runway may disturb guidance signals
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