ASE G1 Maintenance & Lt. Repair Practice Test

21. All the lights in a brake light circuit illuminate except one. The MOST likely cause is:

  • A. An open in the brake switch.
  • B. A closed brake switch.
  • C. A burned bulb.
  • D. Excessive resistance in the circuit.

21.

Answer A is wrong. An open in the brake switch would result in no brake light operation.

Answer B is wrong. A closed brake switch would result in continuous brake light operation.

Answer C is correct. A single bulb or it's associated socket is most likely at fault. In a brake light or parallel circuit, one bulb can burn out while the others are unaffected.

Answer D is wrong. Resistance will result in a dimmed bulb.

22. A hydroboost brake system has reduced braking performance. Technician A says to check the power steering system. Technician B says to check the vacuum check valve. Who is correct?

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

22.

Answer A is correct. The power steering pump produces pressure for the Hydroboost unit.

Answer B is wrong. A vacuum check valve is used on a vacuum power booster. A Hydroboost brake booster uses fluid pressure and a vacuum brake booster uses vacuum.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

23. The TPMS warning light remains illuminated on a direct tire pressure monitoring system, even after driving the vehicle several miles. The LEAST likely cause of this condition is:

  • A. A faulty TPMS sensor
  • B. A weak TPMS sensor battery.
  • C. Low air pressure in the spare tire.
  • D. A faulty wheel speed sensor.

23.

Answer A is wrong. A faulty TPMS sensor will illuminate the TPMS warning light.

Answer B is wrong. A weak or dead TPMS battery will illuminate the TPMS warning light.

Answer C is wrong. Low air pressure in a spare tire that includes a sensor will illuminate the TPMS warning light.

Answer D is correct. A faulty wheel speed sensor will affect an indirect TPMS system. A direct TPMS uses sensors placed inside of the wheel to sense air pressure.

24. A rear wheel drive vehicle has a loud clunk when the transmission is placed into gear and a vibration that increases with vehicle speed. Technician A says this is caused by loose universal joints. Technician B says this is caused by an unbalanced driveshaft. Who is correct?

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

24.

Answer A is correct. U-joints allow the driveshaft to provide torque to the rear wheels at different angles. Loose and worn U-joints will make a clunking noise when the transmission is placed into gear. They also cause noise and vibration that increases with vehicle speed.

Answer B is wrong. An unbalanced drive shaft will cause a vibration that increases with speed, but would not make a clunking noise when the transmission is placed into gear.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

25. A technician notices a swollen oil filter while performing recommended maintenance on a vehicle’s engine. Which of the following is the MOST likely cause of this ballooned oil filter?

  • A. Stuck open oil pressure relief valve.
  • B. Stuck closed oil pressure relief valve.
  • C. Stuck open oil filter bypass valve.
  • D. Contaminated oil.

25.

Answer A is wrong. An open oil pressure valve will cause low oil pressure.

Answer B is correct. A stuck closed oil pressure relief valve could cause high oil pressure and a ballooned oil filter.

Answer C is wrong. A stuck open bypass oil valve would not result in a ballooned filter.

Answer D is wrong. This is a most likely question. A stuck closed oil pressure relief valve is the most likely cause.