ASE A1 Engine Repair Practice Test

16. A squeal is heard in the front of a supercharged V6 engine. This squeal gets louder as the engine is accelerated. Which of these is causing this condition?

  • A. Supercharger front roller bearings.
  • B. Faulty serpentine belt tensioner.
  • C. Turbine shaft needle bearings.
  • D. Both A and B

16.

Answer A is wrong. Superchargers contain roller and needle bearings. They rotate in excess of 10,000 rpm.

Answer B is wrong. They are driven by serpentine belts.

Answer C is wrong. A turbine wheel is part of a turbocharger.

Answer D is correct. Superchargers are belt driven and contain bearings that will squeal when worn or deprived of lubricant.

17. A vehicle's engine is sluggish and slow to crank. Technician A says to check the starter and its circuit first. Technician B says to check the voltage, capacity, and condition of the battery. Who is correct?

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

17.

Answer A is wrong. The battery's a great place to start. Check its voltage, capacity, and condition.

Answer B is correct. Always inspect and test the battery and its connections first.

Answer C is wrong. After the battery, inspect and test on the starter circuit.

Answer D is wrong. Technician B is correct.

18. A vehicle vibrates only when placed in reverse. The MOST likely cause of this condition is:

  • A. Crossed ignition wires.
  • B. A faulty fuel injector.
  • C. A faulty fuel injector.
  • D. A broken engine mount.

18.

Answer A is wrong. Crossed ignition wires would likely cause a vibration in other speeds and gears as well.

Answer B is wrong. A clogged or faulty fuel injector would likely cause a vibration in other speeds and gears as well.

Answer C is wrong. A faulty or improperly replaced balance shaft would cause a vibration while driving. This vibration will increase with vehicle speed.

Answer D is correct. A worn or broken engine mount would result in a vibration that is more pronounced in reverse or in drive.

19. Two technicians are discussing cylinder bore measurements. Technician A says the cylinder's bore should be measured for out of round. Technician B says the cylinder's bore should be measured and checked for taper. Who is correct?

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

19.

Answer A is wrong. Technician A is correct, the cylinder should be checked for any out of round.

Answer B is wrong. Technician B is correct, the cylinder should also be checked for taper.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

20. Technician A says that connecting rods and the rod caps are matched and can not be mixed. Technician B says it may be necessary to mark these parts for reassembly. Who is correct?

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

20.

Answer A is wrong. Both technicians are correct.

Answer B is wrong. Both technicians are correct.

Answer C is correct. This is true, it is a good idea to help avoid a mix up, but never mark the arm or beam as this can create a weak point and eventual engine failure. Mark the base, only if necessary.

Answer D is wrong. Both technicians are correct.