ASE A6 Electrical Electronics Practice Test

1. Technician A says that during a battery capacity test, the voltage should not drop below 9.6 volts at 70° F. Technician B says a battery's voltage reading increases as 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 may need to be replaced. The test duration is 15 seconds because any longer can damage the tool.

Answer B is wrong. The voltage reading gets lower 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. Technician A says the resistance of this sensor decreases as the temperature of the seat increases. Technician B says the two heating elements run in series with each other. Who is correct?

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

2.

Answer A is wrong. Both technicians are correct. It’s an NTC or negative temperature coefficient sensor; the resistance of this sensor decreases as the temperature of the seat increases. This changes the voltage signal sent to the controller.

Answer B is wrong. These two heating elements run in series with each other. An open in this wire will disable both elements.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Learn more about this circuit in the read more section.

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 piece of foil that protects the signal’s integrity.

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

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 then perform voltage drop tests on the starter and starter circuit.

Answer B is correct. Check the battery first.

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

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