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 it is 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. 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 would result in this condition?
- 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 results in a soft spongy brake pedal.
Answer B is wrong. A vacuum check valve is a one-way air valve used on vacuum brake booster systems. A Hydroboost brake 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 pressure from the power steering system instead of vacuum as a source of 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 vehicle 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 of each wheel.
4. A rear-wheel-drive vehicle with an automatic transmission has a vibration that increases with vehicle 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. Loose and worn universal joints.
- D. Loose flywheel bolts.
Answer A is wrong. An out of round tire will cause a vibration that increases with speed, but would not make a clunking noise.
Answer B is wrong. An unbalanced driveshaft will also cause a vibration that increases with speed, but would 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 in case the filter gets clogged. The valve opens and allows the oil to bypass the filter element and run straight to the engine.
Answer D is wrong. Technician A is correct.