ASE G1 Maintenance & Lt. Repair Practice Test

26. A technician measures several spots around a brake rotor with an outside micrometer. Technician A says the technician is checking the rotor for thickness variation. Technician B says the technician is checking the rotor for lateral runout. Who is correct?

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

26.

Answer A is correct. Measure the brake rotor in several different spots for rotor thickness variation. Most minimum specifications are stamped inside the rotor.

Answer B is wrong. Use a dial indicator and rotate the rotor to check for lateral runout.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A s correct.

27. The brake fluid in an ABS brake system has become aerated causing a spongy pedal. Which of these DOT brake fluids are MOST likely to cause this condition.

  • A. Dot 2
  • B. Dot 3
  • C. Dot 4
  • D. Dot 5

27.

Answer A is wrong. DOT 5 brake fluid contains silicon and can become aerated.

Answer B is wrong. DOT 3 and DOT 4 brake fluids are glycol based and used in ABS systems. Silicon based fluids like DOT 5 can become aerated in an ABS system.

Answer C is wrong. DOT 4 brake fluid is glycol based.

Answer D is correct. Silicon based fluids like DOT 5 can become aerated in an ABS system.

28. A faulty thermostat is being replaced. Technician A says a stuck open thermostat will affect engine performance. Technician B says the thermostat controls the engine's operating temperature. Who is correct?

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

28.

Answer A is wrong. The thermostat stays closed preventing coolant from flowing to the radiator until a certain temperature is reached, helping the engine reach operating temperature quickly. A stuck open thermostat prevents an engine from reaching operating temperature. This has a negative effect on engine performance.

Answer B is wrong. It maintains the engine's minimum operating temperature.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

29. A halogen bulb is being replaced in a headlight system. Technician A says to handle the bulb at it's base during installation. Technician B says to wear gloves or use a piece of paper when handling the glass portion of these bulbs. Who is correct?

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

29.

Answer A is wrong. Holding the bulb at its metal base prevents any oil or contaminants from transferring to the delicate bulb.

Answer B is wrong. Touching the glass portion of these bulbs leaves damaging oil, even after washing your hands it's recommended to use a glove or a clean paper towel.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

30. The serpentine accessory drive belt of an engine squeaks, but appears to be in good condition. Technician A says this could be caused by a faulty idler bearing. Technician B says to check the belt with a belt gauge. Who is correct?

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

30.

Answer A is wrong. Worn idler and tensioner bearings squeak and make noise, but remember newer EPDM belts sometimes don't show cracks and wear like their neoprene predecessors. To check an idler or tensioner bearing remove the belt and inspect for looseness and noise.

Answer B is wrong. Using a gauge or belt tension tool is the best way to check belt wear.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

ASE G1 Maintenance and Lt. Repair Quiz
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