Radar Altimeter MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Radar Altimeter”.

1. What is the maximum altitude that can be measured using a radio altimeter?
a) 100ft
b) 500ft
c) 50 ft
d) 5000ft

2. Altimeters that are specifically designed to provide mark signals at specific altitudes for automatic operations are called as _________
a) Radar altimeter
b) Pressure altimeter
c) Altitude marking radar
d) Mark altimeter

3. Why is the radio altimeter placed in the tail of aircraft?
a) Can be placed anywhere
b) When landing tail is closer to the ground
c) When landing nose is closer to the ground
d) Weight balance

4. What is the function leading edge range tracker servo loop?
a) Provide range to the nearest return
b) Speed measurements
c) Vertical speed measurement
d) Automatic ground navigation

5. Which of the following is true with respect with solid state transmitters in pulsed radar altimeters?
a) Input power is around 100W
b) Use receiver pre-amplifiers
c) High reliability
d) Small size

6. What type of waveform must be transmitted to reduce Doppler shit errors?
a) Square
b) Triangular
c) Sine
d) Cosine

7. What is the frequency designated to radar altimeters?
a) 4.2 to 4.4 GHz
b) 2.4 to 4.2 GHz
c) 500 to 1 GHz
d) 13 to 14 GHz

8. Which of the following is responsible for the reduced use of transmitter power in radar altimeter?
a) Low range
b) Interference with other bands
c) Receiver low noise amplifier
d) Radome

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