British Columbia ICBC Knowledge Test — Class 7L Practice Question
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Emergency Situations
When using jumper cables, the final black clamp connects to:
Show Answer & Explanation
Correct Answer: B. An unpainted metal part of the dead vehicle's engine block
Connecting to the dead battery's negative terminal can ignite hydrogen gas escaping from the battery. Grounding to bare engine metal — away from the battery — avoids the risk.
