Instrument Landing System: DGCA Air Navigation questions

Question 1

The coverage of an ILS localizer extends to .......... either side of the on-course line out to a range of .......... NM.

Accepted Answer

35 degrees, 17 NM

Answer

10 degrees, 35 NM

Answer

35 degrees, 10 NM

Answer

25 degrees, 25 NM

Question 2

The upper and lower limits of an ILS glide path transmitter having a 3.5 degree glide slope are:

Accepted Answer

6.125 degrees to 1.575 degrees

Answer

7.700 degrees to 1.225 degrees

Answer

5.250 degrees to 1.350 degrees

Answer

3.850 degrees to 3.150 degrees

Question 3

The visual and aural indications obtained when overflying an ILS middle marker are:

Accepted Answer

alternating medium pitch dots and dashes with amber light

Answer

continuous low pitched dashes with synchronized blue light

Answer

continuous high pitched dots with synchronized amber light

Answer

one letter in Morse with synchronized white light

Question 4

An aircraft carrying out an ILS approach is receiving stronger 150 Hz signals than 90 Hz signals. The correct actions to be taken to place the aircraft on the centre line and on the glide path are to fly:

Accepted Answer

up and left

Answer

down and left

Answer

up and right

Answer

down and right

Question 5

In elevation the upper and lower limits of an ILS glide path transmitter having a 3.0 degree glide slope are:

Accepted Answer

5.25 degrees, 1.35 degrees

Answer

0.35 degrees, 0.70 degrees

Answer

3.00 degrees, at least 6 degrees

Answer

10.0 degrees, 35.0 degrees

Instrument Landing System: DGCA Air Navigation questions

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