Microwave Landing System MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Microwave Landing System”.

1. What does the MLS use to overcome the weakness of ILS system?
a) Narrow beam width antennas
b) More power
c) Filers for separating noise
d) Array of antennas

2. Which of the following is not one of the basic components of the MLS system?
a) Azimuth ground station
b) Elevation ground station
c) DME
d) Radar

3. What is the main weakness of the ILS system?
a) Less power
b) Less range
c) More noise
d) Environment sensitivity

4. Why is a back azimuth station used in some MLS?
a) Better range
b) Less noise
c) Missed approach
d) Back up for main azimuth station

5. Which of the following determines the required transmission power in MLS?
a) Noise
b) Bit error rate
c) Runway length
d) Aircraft size

6. What is the typical scanning rate of the MLS antenna?
a) 20,000°/sec
b) 10000°/sec
c) 500°/sec
d) 37°/sec

7. What is the number of channels in the MLS system?
a) 10
b) 50
c) 4000
d) 200

8. Using an audio tone to encode angles is an efficient method.
a) True
b) False

9. MLS ESA works on the principle of phase shifting.
a) True
b) False

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