Wiring and componentsQuestion 390 of 1506

Which statement about a cycling circuit breaker is correct?

It must be reset by hand each time it opens
It melts once and is then thrown away
A bimetal arm heats, opens, cools and recloses
It uses an electromagnet to trip, not heat

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Correct answer: A bimetal arm heats, opens, cools and recloses

The cycling type repeats open and close until the fault clears.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 5.4: Circuit Protection Devices

Questions last reviewed: 18 October 2026

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