Distance Measuring Equipment: DGCA Air Navigation questions

Question 1

A DME beacon having a transmit frequency of 962 MHz would have a receive frequency of:

Accepted Answer

1025 MHz

Answer

1030 MHz

Answer

902 MHz

Answer

962 MHz

Question 2

Distance Measuring Equipment (DME) is an example of ______ radar operating on a frequency of ______ in the ______ band.

Accepted Answer

Secondary, 962 MHz, UHF

Answer

Primary, 8800 MHz, SHF

Answer

Secondary, 1030 MHz, UHF

Answer

Primary, 9375 MHz, SHF

Question 3

A DME transponder does not respond to pulses received from radars other than DME because:

Accepted Answer

It will only accept the unique twin DME pulses

Answer

Each aircraft transmits pulses at a random rate

Answer

DME transmits and receives on different frequencies

Answer

DME only responds to the strongest 100 interrogators

Question 4

When a DME transponder becomes saturated:

Accepted Answer

It increases the receiver threshold to remove weaker signals

Answer

It reverts to standby mode

Answer

It increases the number of pulse pairs to meet the demand

Answer

It goes into a selective response mode of operation

Question 5

An aircraft flying at FL250 wishes to interrogate a DME beacon situated 400 ft AMSL. What is the maximum range likely to be achieved?

Accepted Answer

222 NM

Answer

210 NM

Answer

198 NM

Answer

175 NM

7 more questions in this chapter, free with an account