ACE Airfield Lighting and Maintenance 2 — Questions and Answers
Question 1: What is the standard color of taxiway centerline lights at a US airport?
- Blue
- Green (Correct answer)
- Yellow
- White
Correct answer: Green
Taxiway centerline lights are green, helping pilots distinguish them from runway lights.
Question 2: Which FAA advisory circular governs the design of airport lighting systems?
- AC 150/5340-30 (Correct answer)
- AC 150/5300-13
- AC 150/5370-10
- AC 150/5200-18
Correct answer: AC 150/5340-30
AC 150/5340-30 covers the design and installation of airport lighting systems.
Question 3: A series circuit airport lighting system fails completely when one lamp burns out. What component prevents this?
- Voltage regulator
- Series isolation transformer (Correct answer)
- Ground fault interrupter
- Constant current regulator
Correct answer: Series isolation transformer
Series isolation transformers allow individual lamps to fail without breaking the entire series circuit.
Question 4: What is the primary function of a Constant Current Regulator (CCR) in airfield lighting?
- Regulate voltage to each fixture
- Maintain steady current through the series circuit (Correct answer)
- Provide backup power during outages
- Control light intensity based on visibility
Correct answer: Maintain steady current through the series circuit
A CCR keeps the current constant in a series circuit regardless of the number of operating lamps.
Question 5: Which lighting system marks the boundary between a runway and a displaced threshold?
- Runway End Identifier Lights (REIL)
- Threshold lights (green) (Correct answer)
- Runway edge lights (yellow)
- Touchdown zone lights
Correct answer: Threshold lights (green)
Green threshold lights mark the beginning of the usable landing portion of a runway.
Question 6: How often must airfield lighting circuits be inspected per FAA requirements under a standard Airport Certification Manual?
- Daily (Correct answer)
- Weekly
- Monthly
- Annually
Correct answer: Daily
Daily inspections of airfield lighting are required under FAR Part 139 to ensure all systems are operational.
Question 7: What does a flashing yellow light at a runway hold short position typically indicate to ground vehicle operators?
- Cleared to cross the runway
- Runway is closed
- Stop and wait for ATC clearance before crossing (Correct answer)
- Taxiway construction ahead
Correct answer: Stop and wait for ATC clearance before crossing
Flashing yellow runway guard lights warn vehicle operators to stop and obtain clearance before entering the runway.
ACE Airfield Lighting and Maintenance 2
What is the standard color of taxiway centerline lights at a US airport?