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. 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?
1 and 4.
2 and 4.
1 and 3.
2 and 3.
2. 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.
3. 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?
2.0 degrees to the right.
2.0 degrees to the left.
1.0 degrees to the left.
1.0 degrees to the right.
4. On an ILS approach, when flying overhead the middle marker the colour of the flashing light will be?
White.
Blue.
Amber.
Green.
5. 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 reciprocal of the main approach runway.
Non-precision approach guidance for the main approach runway.
Precision approach guidance for the main approach runway.
6. The localiser transmits in?
The HF band.
The VHF band.
Both the UHF and the VHF bands.
The UHF band.
7. The ILS inner marker (if available) modulation frequency is?
240 Hz.
3000 Hz.
400 Hz.
1300 Hz.
8. 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.
Dots and a white light flashing.
Two dashes per second and a blue light flashing.
Dashes and an amber light flashing.
9. Inner marker beacon of an ILS transmit at?
75 MHz.
90 Hz.
150 MHz.
It depends on the modulating frequency.
10. The ILS middle marker modulation frequency is?
800 Hz.
3000 Hz.
1300 Hz.
400 Hz.
11. According to ICAO Annex 10 a locator has a range of?
7.5 to 15 nm.
10 to 25 nm.
75 to 150 nm.
75 to 250 nm.
12. 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.
13. The ILD marker identified visually by a blue flashing light is the?
Middle marker.
Outer marker.
Locator.
Inner marker.
14. 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.
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.
Decrease with displacement above or below the glide path.
15. The ILS marker with an aural frequency of 1300 Hz is the?
Middle marker.
Locator.
Outer marker.
Inner marker.
16. What is the effect of FM broadcast stations that transmit on frequencies just below 108 MHz on the performance of ILS?
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.
These transmissions may activate the FM immune filter which results in the appearance of the localiser and glide path failure flag.
These transmissions may interfere with the ILS localiser and glide path signal which may lead to erroneous deviation indications.
17. 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
1450 FT.
1300 FT.
1400 FT.
1350 FT.
18. 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, 2 and 3.
1 and 4.
2, 3 and 4.
1 and 2.
19. The ILS marker identified audibly by a series of two dashes per second is the?
Inner marker.
Middle marker.
Locator
Outer marker.
20. Every 10 kt decrease in groundspeed, on a 3° ILS glidepath, will require an approximate
Increase in the aircraft's rate of descent of 100 FT/MIN.
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.
21. All ILS marker beacons transmit at?
75 MHz.
90 MHz
It depends on the modulating frequency.
150 MHz.
22. Classify the marker from lower aural frequency to higher aural frequency: 1. Inner marker ( if available). 2. Middle marker. 3. Outer marker.
2, 1, 3.
3, 2, 1.
1, 3, 2.
1, 2, 3.
23. A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to
200 feet above the inner marker.
200 feet above the runway threshold.
50 feet above ILS reference point.
Runway surface.
24. What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt?
950 FT/MIN.
800 FT/MIN.
600 FT/MIN.
550 FT/MIN.
25. Performing an ILS approach, you will fly overhead the markers in a specific order. The order is?
OM, MM, IM (if available).
OM, IM (if available), MM.
MM, IM, (if available) , OM.
IM (if available), MM, OM.
26. ILS transmitters use the?
UHF and VHF bands.
VHF, UHF, and HF bands.
VHF band only.
UHF band only.
27. The amplitude modulation and the colour of an outer marker (OM) is
1300 Hz, blue.
3000 Hz, blue.
400 Hz, amber.
400 Hz, blue.
28. Which of these markers has the highest audible frequency?
Middle.
Airways
Outer.
Inner.
29. On an ILS approach, when flying overhead the middle marker the colour of the flashing light will be?
Green.
Blue
Amber
White
30. Locatory are?
LF/MF NDBs used as an aid for the approach.
Beacons with a range of 10 to 250 nm.
Low powered ADFs use for airfield or runway approach.
High powered NDBs used for en route and airway navigation.
31. 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 up.
Fly left and fly up.
Fly right and fly down.
32. 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) different (ii) phases.
(i) the same (ii) phases.
(i) the same (ii) modulation frequencies.
(i) different (ii) modulation frequencies.
33. 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.
3 dashes, 3 dots, and 3 dashes per second continuously.
6 dots per second continuously.
2 dashes per second continuously.
34. "Bean bends" in the ILS approach path are?
Slight curves that can be followed by large aircraft.
Curves in the normal approach because of noise abatement.
Curved approaches made with the aid of the instrument landing system.
Curves in the glide path that are visible on the indicator, but change too fats to be followed by large aircraft.
35. According to ICAO Annex 10, in which frequency band(s) does the locator normally transmit?
LF/MF.
HF
MF/HF.
HF/VHF.
36. The ILS marker identified visually by a white flashing light is the?
Inner marker.
Locator
Outer marker.
Middle marker.
37. 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, 3 and 4.
1 and 3.
2 and 3.
1, 2, 3 and 4.
38. The ILS marker identified by a series of dots (6/sec) is the?
Locator.
Middle marker.
Inner marker.
Outer marker.
39. Which answer states the typical distances along the centreline of the runway of the various ILS components?
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.
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.
40. The ILS receiver of an aircraft on approach and flying on the right of the exact runway centreline will receive?
More 150 Hz localiser signal than the 90 Hz localiser signal.
A modulated signal and will shift the localiser needle to the right according to the magnitude of the difference between the two amplitudes.
The left lobe modulation only.
The modulation from both lobes at equal amplitude.
41. Outer marker beacon of an ILS transmit at?
75 MHz.
150 MHz.
90 Hz.
It depends on the modulating frequency.
42. 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?
Remains unchanged.
Is halved.
Increases fourfold.
Doubles.
43. Which approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 90kt?
450 FT/MIN.
700 FT/MIN.
600 FT/MIN.
400 FT/MIN.
44. 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.
NO markers can be located at this distance.
The inner marker (if available).
45. 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.
To increases aircraft aeparation in very reduced visibility conditions.
Aircraft manoeuring near the runway may disturb guidance signals.
Heavy precipitation may disturb guidance signals.
46. On final on an ILS approach you are flying overhead the outer marker. You can expect to be at?
10 nm from the threshold.
1 nm from the threshold.
25 nm from the threshold.
4 nm from the threshold.
47. The ILS marker with an aural frequency of 3000 Hz is the?
Centreline marker.
Middle marker.
Inner marker (if availale)
Outer marker.
48. The ILS marker with the lower aural frequency is the?
Outer marker.
Middle marker.
Centreline marker.
Inner marker.
49. The transmission of the glide slope beacon is characterised by?
300 to 3000 Hz Amplitude Modulation fro the ATIS.
UHF frequency with a minimum range of 10 nm.
VHF frequency modulated with a 90 Hz AM and 150 Hz AM navigation signal.
UHF carrier frequency with a possible "voice ident".
50. What is measured in order to establish aircraft position in relation to the localiser beam on an ILS?
The bearing of the localiser antenna found by means of a loop antenna.
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 difference in phase between the 90 Hz and the 150 Hz modulations.
Submit
Make New Set
