Email
info@vayudootaviation.com
Phone No
+91 7276526726
become a pilot
Home
About us
courses
CPL
ATPL
RTR(A)
Airline Cadet Program
IGRUA Entrance Prep
B.Sc. Aviation
Pilot Training
INDIA
USA
CANADA
SOUTH AFRICA
NEW ZEALAND
EUROPE
Aircraft Type-Rating
Airbus A320
Boeing 737
Blogs
contact
CPL Test Series
Question Bank
Questions for ILS
Answer the following questions
Test Mode
Training Mode
1. False beams on the ILS glide path are?
Only found if flying the back beam ILS approach.
Only found below the correct glide slope.
Only found above the correct glide slope.
Only found if more that 10 degrees left or right of localiser centreline.
2. 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.
3. Full deflection on a glide slope indicator indicates that the aircraft is?
0.7 degrees above or below the correct glide path.
2.5 degrees above or below the correct glide path.
1.25 degrees above or below the correct glide path.
0.5 degrees above or below the correct glide path.
4. The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually visually by a series of
Dots and a white light flashing.
Two dashes per second and a blue light flashing.
Dashes and an amber light flashing.
Alternate dots and dashes and an amber light flashing.
5. The ILS marker identified by a series of alternate dots and dashes is the?
Locator.
Inner marker.
Middle marker.
Outer marker.
6. The ILS marker with an aural frequency of 3000 Hz is the?
Centreline marker.
Outer marker.
Inner marker (if availale)
Middle marker.
7. The back CRS of an ILS may give?
Precision approach guidance for the main approach runway.
Precision approach guidance for the reciprocal of the main approach runway.
Non-precision approach guidance for the reciprocal of the main approach runway.
Non-precision approach guidance for the main approach runway.
8. The ILS marker identified audibly by a series of two dashes per second is the?
Inner marker.
Middle marker.
Outer marker.
Locator
9. According to ICAO 8168, what is regarded as the maximum safe deviation below the glide path during ILS approaches?
Half scale deflection.
Full scale deflection.
Three quarters scale deflection.
One quarter scale deflection.
10. 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 inner marker warms the pilot of the last chance to commence the missed approach procedure.
The outer marker indicates the position where normally the descent has to commence.
The middle marker indicates the position for the decision for a missed approach during a CATI approach due to bad visibility.
The markers are only important in the situation when glide path transmission has ceased.
11. The heading rose of an HSI is frozen on 200 degrees. Lined up with the ILS of runway 25, the localiser will be?
Centred with the "Fail" flag showing.
Right of centre.
Centred.
Left of centre.
12. 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?
2 and 3.
1 and 3.
2, 3 and 4.
1, 2, 3 and 4.
13. 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).
14. On an ILS approach, the glide slope needle is fully down. How much deflection does this indicate?
0.7 degrees.
5 degrees.
10 degrees.
2.5 degrees.
15. According to ICAO Annex 10 a locator has a range of?
75 to 150 nm.
75 to 250 nm.
10 to 25 nm.
7.5 to 15 nm.
16. A Cat III ILS glide path transmitter provides reliable guidance guidance information down to
The surface of the runway.
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.
17. The rate of descent required to maintain a 3.25 degree glide slope at a ground speed of 140 kts is approximately?
760 ft/min.
700 ft/min.
670 ft/ min.
850 ft/min.
18. Regarding ILS which of the following in true?
All markers transmit at 75 MHz
The localiser part of the frequency band is shared with the DME.
The DME paried with the ILS channels are usually zero referenced next to the departure end of the runway.
The glide path transmitter is located 300m from the departure end of the runway.
19. 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?
2, 3 and 4.
1, 2 and 3.
1 and 4.
1 and 2.
20. 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
To increase distance from the runway during offset approach operations.
Heavy precipitation may disturb guidance signals.
To increases aircraft aeparation in very reduced visibility conditions.
Aircraft manoeuring near the runway may disturb guidance signals.
21. The ILS marker identified by a series of dots (6/sec) is the?
Inner marker.
Locator.
Middle marker.
Outer marker.
22. The ILS inner marker (if available) modulation frequency is?
1300 Hz.
3000 Hz.
400 Hz.
240 Hz.
23. Inner marker beacon of an ILS transmit at?
150 MHz.
90 Hz.
75 MHz.
It depends on the modulating frequency.
24. 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.
A sequence of 3 dashes, 3 dots and 3 dashes every second.
Continuous dashes at a rate of dashes per second.
25. On an ILS approach, when flying overhead the middle marker the colour of the flashing light will be?
White
Blue
Amber
Green.
26. Fill scale deflection of the localiser needle indicates that the aircraft is approximately?
5 degrees offset from the localiser centreline.
2.5 degrees offset from the localiser centreline.
1.25 degrees offset from the localiser centreline.
10 degrees offset from the localiser centreline.
27. The middle market transmits on?
75 MHz.
75 Hz.
1300 MHz.
1300 Hz.
28. The ILS marker with an aural frequency of 1300 Hz is the?
Locator.
Outer marker.
Inner marker.
Middle marker.
29. 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.
100 ft/min.
150 ft/min.
250 ft/min.
30. What is the approximate angular coverage of reliable navigation information for a 3° ILS glide path out to a distance of 10 NM?
3° above and below the glide path and 10° each side of the localiser centreline
0.7° above and below the glide path and 2.5° 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.
1.35° above the horizontal to 5.25° above the horizontal and 8° each side of the localiser centreline.
31. The ILS marker with the lower aural frequency is the?
Middle marker.
Outer marker.
Inner marker.
Centreline marker.
32. The ILS marker identified visually by an amber flashing light is the?
Locator
Outer marker.
Middle marker.
Inner marker.
33. 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.
34. The audio frequency modulation of the middle marker shall be keyed as follows?
3 dashes, 3 dots, and 3 dashes per second continuously.
6 dots per second continuously.
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.
35. On final on an ILS approach you are flying overhead the outer marker. You can expect to be at?
1 nm from the threshold.
25 nm from the threshold.
4 nm from the threshold.
10 nm from the threshold.
36. The ILS middle marker modulation frequency is?
3000 Hz.
800 Hz.
1300 Hz.
400 Hz.
37. 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?
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.
19 nm from touchdown inbound and 13 degrees displaced from the localiser centreline.
38. The localiser transmitters operate in a frequency band between?
111. 975 MHz and 117.975 MHz.
108 MHz and 117.975 MHz.
108 MHz and 111.985 MHz
329015 MHz and 335 MHz.
39. Where, in relation to the runway, is the ILS localiser transmitting aerial normally situated?
At the approach end about 150 m to out side the runway and 300 m from touchdown.
On the non-approach end of the runway about 300 m from the runway on the extended centreline.
At the approach end of the runway about 300 m fro touchdown on the Centrelies.
At the non-approach end about 150 m to one side of the runway and 300 m along the extended centreline.
40. The heading rose of an HSI is frozen on 200°. Lined up on the ILS of runway 25, the localizer needle will be?
Right of centre.
Centred.
Centred with the 'fail' flag showing.
Left of centre.
41. Which of the following correctly describes the Instrument Landing System (ILS) localiser rediation pattern?
Two overlapping lobes on the same VHF carrier frequency.
A pencil beam comprising a series of smaller beams each carrying different modulation.
Two overlapping lobes on different radio carrier frequency but with the same modulation.
Two overlapping lobes on the same UHF carrier frequency.
42. The localiser transmits in?
Both the UHF and the VHF bands.
The UHF band.
The HF band.
The VHF band.
43. Middle marker beacon of an ILS transmit at?
75 MHz.`
90 Hz.
150 MHz.
It depends on the modulating frequency.
44. An ILS receiver?
Measures the phase rotation of the transmitted signals.
Measures the difference in frequency of modulation of the transmitted signals.
Measures the phase difference of the transmitted signals.
Measures the difference in depth of modulation of the transmitted signals.
45. On what carrier frequency does the inner marker transmit?
Same frequency as the glide path.
3000 Hz.
Same frequency as the localiser.
75 MHz.
46. On final on ILS approach, at 0.6 nm from the threshold, which marker are you likely to hear?
NO markers can be located at this distance.
The inner marker (if available).
The middle marker.
The outer marker.
47. The ILS receive of an aircraft flying down the exact runway centreline will receive?
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.
90 Hz and 150 Hz lobes at equal depth.
No modulated signal because the left right lobes cancel each other along the centreline.
48. 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) 8 (ii) 10.
(i) 25 (ii) 17.
(i) 35 (ii) 25.
(i) 5 (ii) 8.
49. 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?
1 and 3.
1.
4.
3 and 4.
50. The audio frequency modulation of the inner marker shall be keyed as follows?
A continuous series of alternate dots and dashes.
3 dashes, 3 dots, and 3 dashes per second continuously.
2 dashes per second continuously.
6 dots per second. Continuously.
Submit
Make New Set
