Altitude Alert Systems: DGCA Air Navigation questions

Question 1

How does a radio altimeter work?

Accepted Answer

Measures the time from transmission to the reception of a CW frequency.

Answer

Measures the Doppler shift of a CW transmission.

Answer

Measures the Doppler shift of a pulse transmission.

Question 2

Radio altimeter gives height indications by:

Accepted Answer

Measuring time diff. of a CW transmitted at changing frequency.

Answer

Measuring the Doppler frequency shift in transmitted frequency.

Answer

Measuring time diff. of a CW transmitted at fixed frequency.

Question 3

In case landing gears are retracted, radio altimeter is showing.

Accepted Answer

Less than actual clearance.

Answer

More then actual clearance.

Answer

Actual clearance.

Question 4

In case landing gears are retracted, radio altimeter.

Accepted Answer

Under- reads

Answer

Over – reads

Answer

Reads - correct

Question 5

Radio altimeter indicates 2000'. What is the minimum ht. that the a/c would be at?

Accepted Answer

1935' in landing configuration

Answer

1935' in cruising configuration

Answer

1945' in landing configuration

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