Practice question

What is the function of a flasher unit in a traffic signal cabinet?

  1. To provide steady-state power to all signal heads
  2. To provide alternating on/off power for flashing signal operations
  3. To monitor for voltage surges in the power supply
  4. To convert AC power to DC power for the controller

Answer: B — To provide alternating on/off power for flashing signal operations

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Practice more: IMSA Traffic Signal I Practice Questions - IMSA Traffic Signal Technician Level I Certification Exam Exam →