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ASE Automobile & Light Truck (A1–A8) — Practice Exam

A6 Battery and starting: practice questions

Our ASE A1–A8 bank has 10 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1 · A6 Electrical/Electronic Systems

A single click from the starter and no cranking, with a good battery, suggests what?

  1. A blown fuel pump fuse
  2. A faulty alternator
  3. Burned solenoid contacts or high resistance in the main circuit
  4. A bad crankshaft position sensor or its wiring harness
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C. Burned solenoid contacts or high resistance in the main circuit — Check voltage at the starter's main terminal while cranking.

Question 2 · A6 Electrical/Electronic Systems

During a conventional battery load test, what is the minimum voltage at about 70 °F after 15 seconds?

  1. 6.0 volts
  2. 9.6 volts
  3. 11.8 volts
  4. 12.6 volts
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B. 9.6 volts — Load at half the CCA rating; many shops now use conductance testers.

Question 3 · A6 Electrical/Electronic Systems

What is the correct order for connecting jumper cables to a vehicle with a dead battery?

  1. Both negatives first
  2. Positive to dead, positive to good, negative to good, negative to a ground away from the dead battery
  3. Any order
  4. Negative to the dead battery first, then positive to dead, then both to the good battery last
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B. Positive to dead, positive to good, negative to good, negative to a ground away from the dead battery — The last connection may spark, so it's made away from the battery.

Question 4 · A6 Electrical/Electronic Systems

What is the open-circuit voltage of a fully charged 12-volt lead-acid battery?

  1. About 11.0 volts
  2. About 10.5 volts
  3. About 13.8 volts
  4. About 12.6 volts
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D. About 12.6 volts — About 12.4 V is roughly 75% charged.

Question 5 · A6 Electrical/Electronic Systems

Why must AGM batteries be charged with a suitable charger setting?

  1. They charge only when cold
  2. Excessive charging voltage can damage them
  3. They need 24 volts
  4. They can't be recharged once they're fully discharged
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B. Excessive charging voltage can damage them — Follow the battery and vehicle maker's recommendations.

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