airport operationsFAA-published sample question (FIA, Aug 2021)
An airport has pilot controlled lighting but runways without approach lights. How many times should you key your microphone to turn on the MIRL at medium intensity?
A
5 clicks.✓ Correct Answer
B
3 clicks.
C
None, the MIRL is left on all night.
Explanation
AIM 2-1-8 says keying the microphone 7 times within 5 seconds selects the highest intensity, 5 times medium or lower intensity, and 3 times the lowest intensity. For medium-intensity MIRL, key 5 times; 3 clicks gives low intensity, and pilot-controlled lighting is not left on all night.
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