ASE G1 Maintenance & Lt. Repair Practice Test

6. The engine of a vehicle will start, but is slow cranking. Technician A says there may be resistance in the starter circuit. Technician B says to perform a voltage drop test to test for excessive resistance in the starter circuit. Who is correct?

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

6.

Answer A is wrong. Resistance in the starter circuit will result in a slow cranking engine. The technician should inspect and test the battery before the starter circuit.

Answer B is wrong. Perform a voltage drop test to find excessive resistance in a circuit.

Answer C is correct. Both technicians are correct, but the battery should be tested and ruled out before testing the starter circuit.

Answer D is wrong. Both technicians are correct.

7. Two technicians are discussing the evaporator's function in an automotive air conditioning system. All of these are true about the evaporator EXCEPT:

  • A. It removes humidity from the air.
  • B. Refrigerant flows from the bottom to the top.
  • C. Refrigerant enters the evaporator as a liquid.
  • D. The refrigerant changes from a vapor to a liquid as it receives heat from the cabin air.

7.

Answer A is wrong. The evaporator removes humidity from the air.

Answer B is wrong. The refrigerant flows from the bottom to the top.

Answer C is wrong. The refrigerant enters the evaporator core as a liquid.

Answer D is correct. The refrigerant converts from a liquid to a vapor. This is because it boils as it receives heat from the cabin air. Refrigerant has a very low boiling point.

8. Technician A says a stuck open PCV valve will cause a lean fuel condition. Technician B says the PCV system removes blowby gases from the crankcase. Who is correct?

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

8.

Answer A is wrong. A stuck open PCV valve will cause a lean condition, the engine will misfire and the PCM will attempt to adjust the air fuel ratio accordingly.

Answer B is wrong. The PCV system cleans and protects the crankcase from blowby gas bypassing the piston rings and contaminating the engine oil. Vacuum through the open valve draws blowby gas into intake manifold and then into the combustion chamber for re-combustion.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

9. A technician removes and replaces a worn lower radiator hose on a four cylinder engine. The engine overheats after replacing the hose and adding coolant. Which of these is the MOST likely cause of this condition?

  • A. A faulty ECT sensor.
  • B. A stuck open thermostat.
  • C. An air pocket in the system.
  • D. Electrolysis.

9.

Answer A is wrong. A faulty ECT sensor will cause the vehicle to overheat, but usually if the vehicle overheats after the coolant has been drained and filled it is caused by an air pocket in the cooling system.

Answer B is wrong. A stuck open thermostat will result in a below normal operating temperature.

Answer C is correct. An air pocket has likely formed. Water pump cavitation and air pockets cause this condition.

Answer D is wrong. Electrolysis is caused by coolant breakdown and shorts in the electrical system. It prematurely corrodes aluminum parts like water pumps and thermostat housings.

10. Engine mounts were recently replaced on a front wheel drive vehicle with independent suspension. The vehicle now has a steady pull to the left at all speeds. Technician A says this is caused by loose motor mounts. Technician B says this is caused by a misaligned engine cradle. Who is correct?

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

10.

Answer A is wrong. Loose or worn motor mounts result in excessive vibrations from the engine.

Answer B is correct. A misaligned engine cradle will affect alignment angles resulting in pull.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.