Engineering · Electrical — Batteries
When charging lead-acid storage batteries, good ventilation is required because charging produces:
- ACarbon monoxide
- BHydrogen gas, which is explosive✓ Correct
- CRefrigerant vapor
- DSulfur dioxide
Explanation
Charging lead-acid cells liberates hydrogen, which is explosive in air. Battery rooms must be ventilated and kept free of sparks and open flames.
Authority: Marine Electrical (USCG engineering topic)
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