ASE A6 Electrical Electronics Practice Test

66. A technician replaces a blown fuse in the dome light circuit, and the element in the fuse melts immediately. Technician A says if a dome light keeps blowing fuses to check for a short to ground. Technician B says excessive resistance in this circuit has increased current flow. Who is correct?

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

66.

Answer A is correct. When a circuit repeatedly blows a fuse, check for a short.

Answer B is wrong. Resistance decreases current flow. Fuses protect automotive circuits from excessive current.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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67. All of the following are true about 12-volt maintenance-free battery replacement EXCEPT:

  • A. Use a computer memory saver.
  • B. Remove the negative terminal first.
  • C. Replace the positive terminal last.
  • D. Use a battery terminal puller if the terminal is stuck to the post.

67.

Answer A is wrong. Using a memory saver is a great way to retain the memory in computer modules.

Answer B is wrong. Remove the negative terminal first.

Answer C is correct. The negative terminal is the first off and the last on.

Answer D is wrong. If the terminal is stuck to the post, don’t pry at it and possibly damage the case. Use a battery terminal puller instead.

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68. All of the following are true statements about a fully charged lead acid battery EXCEPT:

  • A. It acts as a capacitor smoothing current.
  • B. It powers the accessories while the engine is running.
  • C. The electrolyte has a specific gravity of 1.265
  • D. It powers the starter while the engine is cranking.

68.

Answer A is wrong. Due to the nature of their design, batteries act as capacitors, smoothing A/C current and alternator ripple.

Answer B is correct. This is an EXCEPT type question. Once the engine starts, the charging system takes over and provides power for all accessories.

Answer C is wrong. The electrolyte of a good battery has a specific gravity of ~1.265.

Answer D is wrong. It provides a high current above 100 amps to operate the starter motor and power engine systems during cranking and starting.

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69. With the engine running the voltage between pin 6 and ground measures 3.00 Vdc and the voltage between pin 14 and ground measures 2.00 Vdc. Technician A says this is normal. Technician B says these readings indicate crossed wires or shorted connector pins. Who is correct?

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

69.

Answer A is correct. The reading changes with the activity on the bus. Typically the measurement is taken from the OBD II DLC of a system without a gateway or by back-probing the CAN HI and CAN LO pins of an easy-to-access control module's connector on a system with a gateway. The signal should be above 2.5 Vdc on the CAN HI wire and below 2.5 Vdc on the CAN LO wire.

Answer B is wrong. When CAN HI shorts to CAN LO, the voltage will remain around 2.5 Vdc on both wires.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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70. The windshield wipers on a vehicle are slow and dragging across the windshield. Technician A says this could be an open circuit at the motor's ground. Technician B says the wiper linkage may be binding. Who is correct?

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

70.

Answer A is wrong. The windshield wipers would be inoperable.

Answer B is correct. Binding linkage will cause the wipers to drag.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

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ASE A6 Electrical Electronics Quiz
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