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.
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.
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.
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.
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.
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.
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.
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.
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
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.