CFC Airfield Lighting & Signaling 3 — Questions and Answers
Question 1: What color are standard taxiway edge lights?
- White
- Green
- Blue (Correct answer)
- Yellow
Correct answer: Blue
Taxiway edge lights are blue omnidirectional lights that distinguish taxiways from runways, which use white edge lights.
Question 2: Taxiway centerline lights are what color?
- Blue
- White
- Green (Correct answer)
- Alternating green and yellow
Correct answer: Green
Taxiway centerline lights are steady green, guiding pilots along the centerline from runway exit to parking.
Question 3: To activate Pilot Controlled Lighting (PCL) at the highest intensity, a pilot must click the microphone how many times within 5 seconds?
- 3 clicks
- 5 clicks
- 7 clicks (Correct answer)
- 9 clicks
Correct answer: 7 clicks
Seven clicks within 5 seconds on the CTAF/UNICOM frequency activates PCL at high intensity; 5 clicks = medium, 3 clicks = low intensity.
Question 4: Stop bar lights at a controlled airport are what color and orientation?
- Green lights across the taxiway
- Unidirectional red lights across the taxiway (Correct answer)
- Flashing yellow lights along the taxiway edge
- Alternating red and blue lights
Correct answer: Unidirectional red lights across the taxiway
Stop bar lights are a row of unidirectional steady red lights installed across a taxiway at the runway holding position, illuminated to indicate hold short.
Question 5: Runway guard lights (formerly called 'wig-wags') are used to:
- Mark the runway centerline during low visibility
- Warn pilots and ground vehicles of an active runway intersection (Correct answer)
- Indicate the glidepath to the threshold
- Signal aircraft on the taxiway to hold for ATC
Correct answer: Warn pilots and ground vehicles of an active runway intersection
Runway guard lights are alternating flashing yellow lights on each side of a taxiway at a runway holding position, alerting pilots and vehicle drivers of an active runway.
Question 6: Lead-in lights (LDIN) are used to:
- Mark the touchdown zone at night
- Guide aircraft along a curved or offset approach path to align with the runway (Correct answer)
- Indicate the ILS glideslope center
- Warn of terrain obstacles on approach
Correct answer: Guide aircraft along a curved or offset approach path to align with the runway
Lead-in lights are a series of flashing lights that guide aircraft from the approach fix along a curved or indirect route to align with a straight-in approach or runway.
Question 7: Clearance bar lights installed on a taxiway consist of:
- Three steady yellow lights across the taxiway (Correct answer)
- Blue flashing lights on each side of the taxiway
- Two green lights flanking the taxiway centerline
- A row of alternating red and green inpavement lights
Correct answer: Three steady yellow lights across the taxiway
Clearance bar lights are three in-pavement steady yellow lights across the taxiway, installed at holding positions to increase the conspicuity of the hold short point.
CFC Airfield Lighting & Signaling 3
What color are standard taxiway edge lights?