ASE A1 Engine Repair Practice Test

26. Two technicians are discussing the camshaft in a V8 engine. Technician A says to use an outside micrometer to measure the diameter of a camshaft journal. Technician B says a camshaft spins twice for every one revolution of the crankshaft. Who is correct?

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

26.

Answer A is correct. Use an outside micrometer to check camshaft journal diameter.

Answer B is wrong. A crankshaft turns twice for every camshaft revolution.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

27. A vehicle is emitting black exhaust from its tailpipe under all driving conditions. This is because:

  • A. There is oil in the combustion chamber.
  • B. There is coolant in the combustion chamber.
  • C. There is too much fuel in the combustion chamber.
  • D. There is too much air in the combustion chamber.

27.

Answer A is wrong. Excess oil in the combustion chamber results in blue/gray smoke.

Answer B is wrong. Excess coolant in the combustion chamber results in white smoke.

Answer C is correct. Excess fuel in the combustion chamber results in black smoke.

Answer D is wrong. Excess air in the combustion chamber results in a lean fuel condition.

28. The top compression ring groove of piston is worn excessively and the gap is found to be larger than specifications. The technician would MOST likely:

  • A. Use a tapered ring set to repair this piston.
  • B. Use oversized rings to repair this piston.
  • C. Use a ring groove cleaner to repair the grooves.
  • D. Replace the piston.

28.

Answer A is wrong. Many manufacturers install tapered rings on their pistons factory. The compression pressure actually help the ring seal against the cylinder.

Answer B is wrong. Installing a larger piston ring would not repair this condition.

Answer C is wrong. This was done to remove carbon from the ring grooves before measurements were taken.

Answer D is correct. Replace the damaged piston.

29. During initial inspection the technician notices that there’s a strong sulfur odor emitting from the vehicle’s tailpipe. The customer states that the vehicle has been getting poor fuel mileage. The MOST likely cause of this condition is:

  • A. A lean fuel condition.
  • B. Leaking head gasket.
  • C. Worn piston rings.
  • D. A rich fuel condition.

29.

Answer A is wrong. A lean fuel condition would not cause this condition.

Answer B is wrong. A leaking head gasket would result in gases escaping the seal and fluids such as coolant leaking in. The vehicle would likely emit white smoke from it's tailpipe.

Answer C is wrong. Worn piston rings will result in gray smoke emitting from the tailpipe.

Answer D is correct. A rich fuel condition will result in a sulfur smell coming from the vehicle's tailpipe.

30. A technician performs a battery capacity test on a vehicle that will not start. The test results in a reading of 9.1 volts at 70° F. Technician A says the battery has failed the capacity test. Technician B says battery voltage readings will increase as temperature decreases. Who is correct?

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

30.

Answer A is correct. If the capacity voltage goes below 9.6 volts at 70° F the battery has failed the capacity test.

Answer B is wrong. The voltage reading gets lower as the outside temperature drops.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.