ASE A6 Electrical Electronics Practice Test

21. A vehicle's factory alarm system activates on its own. Technician A says this could be a faulty courtesy light switch. Technician B says an intermittent problem with a trunk or hood switch can cause this activation. Who is correct?

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

21.

Answer A is wrong. Both technicians are correct.

Answer B is wrong. Both technicians are correct.

Answer C is correct. Sensors used by alarm systems include door, trunk, and hood switches. The control module senses any changes in the vehicle's electrical system, like an attempt to open a door or start the engine.

Answer D is wrong. A loose trunk, hood, or door hinge could cause intermittent problems. All three of these switches are used to prevent unauthorized entry.

Electrical symbol

22. The electrical symbol above is:

  • A. A variable resistor.
  • B. A capacitor.
  • C. An inductor.
  • D. None of these.

22.

Answer A is correct. A variable resistor allows for adjustment and change in resistance between two points in a circuit.

Answer B is wrong. A capacitor is a device used to store an electric charge. They're great for smoothing current in a circuit or circuit board.

Answer C is wrong. An inductor stores energy in a magnetic field created by the passing of electricity.

Answer D is wrong. The component represented in the symbol is a variable resistor.

23. A vehicle's battery continues to discharge while sitting overnight. Technician A says to perform a parasitic battery drain test. Technician B says this could be a slow drain caused by a faulty alternator. Who is correct?

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

23.

Answer A is wrong. An excessive parasitic drain drains the battery overnight.

Answer B is wrong. A faulty alternator diode could cause this drain.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Perform a parasitic battery drain test when there's an unnecessary or excessive key-off drain.

Glove box lamp circuit.

24. The lamp in the glove box does not operate. The test light illuminates at point C with the glove box open, and the switch closed. The inoperative lamp is caused by:

  • A. A burned bulb filament.
  • B. An open circuit between the switch and the ground.
  • C. Excessive resistance at point B of the circuit.
  • D. A short to ground at point D of the circuit.

24.

Answer A is wrong. A burned bulb in a series circuit creates an open, blocking the flow of electricity. It's an example of an open in the circuit's load. The test light would not illuminate with a burned bulb in a series circuit.

Answer B is correct. A loose or open ground circuit will prevent glove box lamp illumination.

Answer C is wrong. If there were resistance at point B, the test light would likely light dimly. An open in the circuit results in no operation.

Answer D is wrong. A short to ground at point D would be redundant to the ground provided by the actual circuit.

25. An alternator output test is being performed on a vehicle's charging system. Technician A says engine idle must be increased during this test. Technician B says the vehicle's accessories must be turned on during this test. Who is correct?

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

25.

Answer A is wrong. Increase the engine's idle during an alternator maximum output test.

Answer B is wrong. Turn on accessories during an alternator maximum output test.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.