Doppler Radar MCQ’s

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

1. The Doppler radar works by measuring the ________ of the reflected radio wave.
a) Intensity
b) Frequency
c) Doppler amplitude
d) Doppler shift

2. Which of the following is not true with respect to Doppler radar system?
a) Measures the ground velocity
b) Transmitter power is high and requires ground assistance
c) Velocity is extremely accurate
d) All weather system

3. What is the primary function of the Doppler radar?
a) Determining true airspeed
b) Determining ground speed
c) Determining altitude
d) Detecting stealth aircraft

4. Doppler radar cannot be used in helicopters.
a) True
b) False

5. The configuration in which the Doppler radar beams are both forward and backward looking is called as?
a) Janus
b) Dual
c) Redundant
d) Wide beam

6. A Janus configuration has less error than a non-Janus configuration.
a) True
b) False

7. What is the change in the observed frequency called?
a) Doppler shift
b) Differential frequency
c) Delta frequency
d) Delta shift

8. What is the number of beams that a Doppler radar uses?
a) 4
b) 2
c) 1
d) 3

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