ASE G1 Maintenance & Lt. Repair Practice Test

1. One of the vehicle's brake lights is inoperative. All other lights are functioning normally. Which of the following should be checked first?

  • A. The battery.
  • B. The brake switch.
  • C. The bulb.
  • D. The circuit's fuse.

1.

Answer A is wrong. All other lights are functioning normally. A quick check of the bulb and its socket is in order.

Answer B is wrong. A closed brake switch would result in continuous brake light operation and an open brake switch results in no brake light operation.

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

Answer D is wrong. An open fuse element results in no brake lights.

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2. A hydroboost brake system has a hard brake pedal and reduced braking performance. Which of the following could be the cause?

  • A. Aerated brake fluid.
  • B. A leaking vacuum check valve.
  • C. A faulty vacuum pump.
  • D. Aerated power steering fluid.

2.

Answer A is wrong. Aerated brake fluid produces a soft, spongy pedal.

Answer B is wrong. A vacuum check valve is a one-way air valve used on vacuum brake booster systems. A Hydroboost booster uses fluid pressure, and a vacuum brake booster uses vacuum pressure.

Answer C is wrong. The power steering pump produces pressure for the Hydroboost unit.

Answer D is correct. Aerated power steering fluid reduces hydroboost brake booster performance. Hydroboost brake systems use hydraulic fluid pressure from the power steering system instead of a vacuum as a source for power assist.

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3. The TPMS warning light goes out after driving the vehicle for several miles. The MOST likely cause of this condition is:

  • A. An out-of-round tire.
  • B. Low tire air pressure.
  • C. A weak TPMS sensor battery.
  • D. A faulty wheel speed sensor.

3.

Answer A is wrong. An out-of-round tire causes a vibration that increases with speed.

Answer B is correct. The (TPMS) Tire Pressure Monitoring System warning light goes out after driving the vehicle a few miles because the air pressure in the tire increases as it heats up.

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

Answer D is wrong. A faulty wheel speed sensor will affect an indirect TPMS system. A direct TPMS monitors pressure sensors placed inside each wheel.

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4. A rear-wheel-drive vehicle with an automatic transmission has a vibration that increases with speed. There is a loud clunk when the transmission is shifted from park to drive or reverse. Which of the following is causing this condition?

  • A. An out-of-round tire.
  • B. An unbalanced driveshaft.
  • C. Worn universal joints.
  • D. Loose flywheel bolts.

4.

Answer A is wrong. An out-of-round tire will cause a vibration that increases vehicle speed but will not make a clunking noise.

Answer B is wrong. An unbalanced driveshaft will also cause a vibration that increases speed but will not make a clunking noise.

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

Answer D is wrong. Loose flywheel bolts cause noise in manual transmissions.

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5. An oil filter has ballooned on a four-cylinder engine. Technician A says a stuck closed oil filter bypass valve would cause this swelling. Technician B says a stuck open oil pressure valve would cause this swollen filter. Who is correct?

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

5.

Answer A is correct. A stuck closed oil pressure bypass valve could cause a ballooned oil filter.

Answer B is wrong. A stuck open oil pressure valve results in unfiltered oil.

Answer C is wrong. The bypass valve protects the engine if the filter gets clogged. The valve opens, allowing the oil to bypass the filter element and run straight to the engine.

Answer D is wrong. Technician A is correct.

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