Red Seal Electrician Practice
Motor controlsQuestion 96 of 1506

What does a one-shot timer relay provide?

  1. One output pulse of set length for each time the input is energized
  2. Repeated pulses while the coil stays energized
  3. An output that changes state only if the coil stops being cycled on and off
  4. A delayed contact opening after de-energization only
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Correct answer: One output pulse of set length for each time the input is energized

A recycle timer gives repeating pulses. A watchdog timer reacts if the input stops cycling.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 5.3: Time-delay Relays

Practice motor controls

Questions last reviewed: 18 October 2026