ASE A6 Electrical Electronics Practice Test

1. A vehicle's body ground strap is burned and beginning to separate. Which of these could be the cause?

  • A. Worn starter brushes.
  • B. Resistance in the starter ground circuit.
  • C. A loose body ground connection.
  • D. A loose engine ground connection.

1.

Answer A is wrong. Worn starter brushes result in a slow cranking starter.

Answer B is wrong. Resistance in the starter ground circuit results in a slow cranking starter.

Answer C is wrong. The body ground is of a smaller gauge and provides a ground for the vehicle's accessories.

Answer D is correct. Electricity always seeks the easiest path to ground. A loose engine ground causes excessive current to flow through smaller body ground on its way back to the battery. The excessive current will damage the thinner cable.

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2. Full-fielding an alternator:

  • A. Bypasses the alternator's stator.
  • B. Produces zero voltage output.
  • C. Bypasses the alternator's voltage regulator.
  • D. Has no effect on voltage output.

2.

Answer A is wrong. The stator produces a magnetic field in an alternator.

Answer B is wrong. Charging voltage can be regulated using an electro-mechanical, electronic, or computer-controlled regulator.

Answer C is correct. Full-fielding an alternator bypasses the voltage regulator and produces maximum voltage output.

Answer D is wrong. The increase in field current increases the magnetic field created inside the alternator.

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3. The plug leading from the harness to an airbag sensor is MOST likely:

  • A. Yellow
  • B. Red
  • C. White
  • D. Black

3.

Answer A is correct. The plug will most likely be yellow.

Answer B is wrong. The airbag module contains the airbag and the inflator assembly incorporated into a module compact enough to fit into a steering wheel, passenger dash, or the side of the front seat.

Answer C is wrong. Sensors are located behind the front bumper and inside the passenger compartment.

Answer D is wrong. Yellow tape is also available for airbag systems.

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Click to Enlarge.

4. There is excessive resistance at point A in the heated seat circuit above. Technician A says the two heated seat elements are part of a series circuit. Technician B says this resistance will affect both heating elements. Who is correct?

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

4.

Answer A is wrong. This is a diagram of a series circuit; series circuits are different from parallel circuits. In parallel circuits, one of the components can fail without affecting the others.

Answer B is wrong. In a series circuit, an open or resistance in a wire or plug affects both elements.

Answer C is correct. Both technicians are correct.

Answer D is wrong. The module uses the signal from the NTC sensor for safety and to regulate temperatures for HI and LOW settings. Learn more about this circuit in the read more section.

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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 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.

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