Technician exam question T0A10
Subelement T0, SAFETY· Group T0A
What hazard exists when rapidly charging or discharging an unprotected battery?
- A.Overheating or out-gassing (correct answer)
- B.Excess output ripple
- C.Electric shock
- D.Overvoltage
WhyRapidly charging or discharging an unprotected battery risks overheating or out-gassing. Charging or discharging a battery faster than it's designed for drives excessive internal heating and can cause it to vent gas or, in a sealed cell, build dangerous internal pressure, answer A. It's not primarily a ripple issue (B), rapid charge/discharge current isn't itself a shock hazard to a nearby person (C), and it's a current, not voltage, extreme that causes this specific hazard (D).
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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