ASE A6 Electrical Electronics Practice Test

1. Technician A says the voltage should not drop below 9.6 volts at 70° F during a battery capacity test. Technician B says the battery's state of charge and voltage increase as the outside temperature decreases. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

1.

Answer A is correct. If the capacity voltage drops below 9.6v at 70° F, the battery has failed the capacity test. Determine the load by retrieving the CCA from the battery case and reducing this number by half. The discharge rate is one-half of the battery's cold-cranking rating

Answer B is wrong. Temperature affects a battery. The battery's SoC (State of charge) and voltage decrease as the outside or ambient temperature drops.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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2. A power antenna is inoperative. The technician replaces the recommended 15 amp fuse, and the element melts immediately. Technician A says a short circuit could be the cause. Technician B says to use a 20 amp fuse to protect this circuit. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

2.

Answer A is correct. A short circuit produces an excessive current that melts the fuse element, protecting the rest of the circuit.

Answer B is wrong. Installing a fuse with a higher amperage rating may damage the circuit. This is because a higher-rated fuse allows more current to flow through the circuit than it can handle.

Answer C is wrong. Small wires burn and open, and electronic components and circuit boards overheat from current overload.

Answer D is wrong. Technician A is correct.

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Automotive electrical symbol.

3. The electrical symbol in the illustration above indicates:

  • A. Twisted pair wire.
  • B. A heating element.
  • C. Wire insulation.
  • D. Shielded wire.

3.

Automotive electrical symbol.

Answer A is wrong. This is the symbol for shielded wire.

Answer B is wrong. Shielding a wire protects it from outside interference.

Answer C is wrong. Wire insulation also protects the signal.

Answer D is correct. CAN networks use shielded wire. The shield is often a foil that protects the signal’s integrity.

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4. Technician A says a hydrometer measures the density of a battery's electrolyte solution. Technician B says the electrolyte solution's specific gravity gets closer to 1.0 as a battery discharges. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

4.

Answer A is wrong. The charge indicator is a small hydrometer found in many maintenance-free batteries.

Answer B is wrong. As a lead-acid battery discharges, its electrolyte solution gets closer to water or 1.0.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

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5. An engine's starter will not crank. Which of the following should be checked first?

  • A. The starter.
  • B. The battery.
  • C. The ignition switch.
  • D. The fuse panel.

5.

Answer A is wrong. Check the condition of the battery first. A good battery passes all testing and has 12.6 volts. Check the condition of the battery terminals/cables and perform voltage drop tests on the starter and starter circuits.

Answer B is correct. Check the battery first.

Answer C is wrong. Check the ignition switch to ensure it provides power to the starting circuit when placed in the start position.

Answer D is wrong. Starter relays use low current to control high current components.

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