ASE A6 Electrical Electronics Practice Test
1. A vehicle’s battery continues to discharge overnight. The vehicle was repaired, and a battery drain test was performed. The reading on the multimeter above indicates the parasitic drain. Which of the following is correct?
- A. This is acceptable.
- B. This indicates 35mA of current.
- C. This indicates 35A of current.
- D. Both A and B.
Answer A is wrong. A battery parasitic drain test determines if a vehicle has an excessive continuous drain after the vehicle has been shut down.
Answer B is wrong. As a rule of thumb, a parasitic drain up to 50mA is considered acceptable. This reading indicates 35mA of current.
Answer C is wrong. Amperage is a measurement of current. The reading indicates 35mA, which is much less current than 35A.
Answer D is correct. Both A and B are correct.
2. A vehicle has a starting problem. The battery has been checked and found to be fully charged and in good condition. A starter current draw test is performed to check the starter circuit. All of the following are true EXCEPT:
- A. An ammeter is used to test starter current draw.
- B. Do not crank the engine for more than 2 minutes.
- C. The battery voltage should measure at least 12.6 volts.
- D. Disable the fuel or ignition system.
Answer A is wrong. Use an ammeter to test starter current draw.
Answer B is correct. Don't crank the engine for more than 15 seconds and allow the starter to cool for 2 minutes between cranks.
Answer C is wrong. Battery voltage should measure at least 12.6 Volts. Generally, at 70° a battery charged to 12.4 volts is ~ 75% charged, and one charged to 12.2 volts is ~ 50% charged. This test requires a fully charged battery.
Answer D is wrong. Disable the fuel or ignition system, so the engine doesn't start.
3. The dome light in a vehicle flickers on and off with the switch in the ON position. The MOST likely cause of this problem is:
- A. A short to ground between the power source and the dome light.
- B. An open in the wire leading from the power source to the dome light.
- C. A loose connection between the power source and the dome light.
- D. A burned dome bulb.
Answer A is wrong. A short to ground will most likely result in a blown fuse and no illumination.
Answer B is wrong. An open in the circuit will result in no illumination of the dome light.
Answer C is correct. Look for loose connections in the dome circuit, possibly the bulbs socket. When there is an intermittent problem, look for a loose wire, plug, or ground connection resulting in this condition.
Answer D is wrong. A burned bulb would result in no illumination.
4. The passenger's window in the illustration above is inoperative. It is stuck in the up position. The driver's side window is good. Which of the following is MOST likely causing this condition?
- A. A faulty relay.
- B. An open circuit breaker.
- C. A faulty motor.
- D. A poor ground.
Answer A is wrong. There are no relays in this circuit.
Answer B is wrong. Many window motors have self-resetting circuit breakers. Circuit breakers protect the window circuit from high current.
Answer C is correct. It most likely has a bad window motor. This is common and the MOST likely cause.
Answer D is wrong. The circuit has a common ground that would affect both windows.
5. All of the following are true about the circuit in the diagram above EXCEPT.
- A. It is a ground switched circuit.
- B. It contains two relays.
- C. The solid dots indicate a junction.
- D. It is a positive pulse relay circuit.