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Which measurement is taken during cranking to assess a battery?

  • A.The time taken for the engine to start, which indicates whether the battery is able to sustain the cranking speed
  • B.The lowest voltage reached while the engine turns
  • C.The current drawn by the starter, which indicates the condition of the battery rather than that of the starter motor
  • D.The charging voltage

Answer: B

Cranking voltage should stay above about 9.6 volts, and a lower figure with normal starter current points to the battery. Starter current is measured too but reflects the starter and the engine, which makes the second option a related measurement wrongly attributed. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. A symptom that appears under one condition and not another is what narrows the diagnosis quickly.

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