In Austrian vehicle safety and driving technique, why should the black negative booster cable not be attached directly to the negative pole of the discharged battery?
Answer and explanation
Correct answer: A. Sparks created during connection could ignite explosive oxyhydrogen gas vented by the battery
- Step 1: Lead-acid batteries emit flammable hydrogen gas when charging or discharging; connection sparks near the vent caps can trigger a battery explosion. Answer: Sparks created during connection could ignite explosive oxyhydrogen gas vented by the battery. Why not the others: The recipient battery would immediately reverse its internal polarity, The donor vehicle alternator would blow its main starter fuse and The booster cable copper core would melt from excessive voltage drop do not reflect Austrian technical safety guidelines.
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