FCC Element 8-radar Endorsement
6 Questions
| Attempts: 128
FCC Commercial Element 8 Question Pool (approved 25 June 2009) Subelement A – RADAR Principles – 10 Key Topics – 10 Exam Questions – 8 Drawings
Questions and Answers
- 1.8-6A4 If the RADAR unit has a pulse repetition frequency (PRF) of 2000 Hz and a pulse width of 0.05 microseconds, what is the duty cycle?
- A.
0.0001
- B.
0.0005
- C.
0.05
- D.
0.001
- 2.8-5A1 For a range of 5 nautical miles, the RADAR pulse repetition frequency should be:
- A.
16.2 Hz or more.
- B.
16.2 MHz or less.
- C.
1.62 kHz or more.
- D.
16.2 kHz or less.
- 3.8-39E5 How does antenna length affect the horizontal beamwidth of the transmitted signal?
- A.
The longer the antenna the wider the horizontal beamwidth
- B.
The longer the antenna the narrower the horizontal beamwidth.
- C.
The horizontal beamwidth is not affected by the antenna length.
- D.
None of the above.
- 4.8-4A1 A pulse RADAR has a pulse repetition frequency (PRF) of 400 Hz, a pulse width of 1 microsecond, and a peak power of 100 kilowatts. The average power of the RADAR transmitter is:
- A.
25 watts.
- B.
40 watts.
- C.
250 watts
- D.
400 watts.
- 5.8-47F3 Loss of distant targets during and immediately after wet weather indicates:
- A.
A leak in waveguide or rotary joint.
- B.
High atmospheric absorption.
- C.
Dirt or soot on the rotary joint.
- D.
High humidity in the transmitter causing power supply loading.
- 6.8-1A4 What RADAR component controls timing throughout the system?
- A.
Power supply.
- B.
Indicator.
- C.
Synchronizer.
- D.
Receiver.
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