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Which risk does tow starting a modern vehicle carry?

  • A.Damage to the catalytic converter from unburnt fuel
  • B.Damage to the battery, which is subjected to a heavy discharge as the engine is turned by the driven wheels
  • C.None
  • D.Damage to the clutch, which must be slipped in order to turn the engine and therefore overheats during the attempt

Answer: A

Unburnt fuel passing to a cold catalyst can ignite there and destroy it, and automatics cannot be tow started at all. Clutch wear is genuinely a factor too, which makes the last option a real if lesser concern. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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