Engine Repair Final Exam Questions with Correct Answers 100% Verified|
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Technician A says that aluminum expands at a different rate than cast iron. Technician B says
that cast iron has a coefficient of thermal expansion two or three times greater than aluminum.
Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B a. Technician A
While discussing proper engine break-in: Technician A says that the engine should run at idle
speed for at least 2 hours. Technician B says that the engine should be accelerated from a stop
at full throttle to 50 mph and that this cycle should be repeated at least ten times. Who is
correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B d. Neither A nor B
While tightening a TTY bolt: Technician A initially tightens the bolt to the specified torque.
Technician B turns the bolt an additional amount after the bolt has been tightened to the
specified torque. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B c. Both A and B
,Before reusing head or other critical bolts: Technician A measures their length and compares
the measurement to specifications. Technician B lubricates the threads and the bottom of the
bolt head with engine oil before installing them. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B c. Both A and B
While selecting the proper RTV for a particular application: Technician A uses RTV in a black
tube for all high-temperature applications. Technician B uses RTV in a red tube for most general
applications. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B d. Neither A nor B
The presence of air in the cooling system indicates the head gasket is faulty.
a. True b. False b. False
Oil pressure is determined by whether the pump is a gear type or rotor type and by oil
clearances, the pump's pressure regulator valve, and oil viscosity.
a. True b. False b. False
To eliminate the drain of engine power during times when cooling fan operation is not needed,
many of today's belt-driven fans have a fan clutch that prevents the operation of the fan when
the engine and radiator are heated up.
a. True b. False b. False
,Which of the following is a function of the engine's lubrication system?
a. Holds an adequate supply of oil
b. Removes contaminants from the oil
c. Delivers oil to all necessary areas of the engine
d. All of the above d. All of the above
For every pound of pressure put on engine coolant, the boiling point of the coolant is raised
about ___.
a. 2°F (1.1°C)
b. 3°F (1.6°C)
c. 4°F (2.2°C)
d. 5°F (2.7°C) b. 3°F (1.6°C)
Which is not a typical method of driving the water pump?
a. Accessory drive belt
b. Electric motor
c. Hydraulic motor
d. Timing belt c. Hydraulic motor
Which of the following is not an effective way to determine if an engine has an internal coolant
leak?
a. Performing a pressure test on the system
b. Visually inspecting the exhaust, coolant, and engine oil
c. Using a dye penetrant and black light
d. Using a combustion leak tester c. Using a dye penetrant and black light
, Cooling system hoses should be replaced when they are ___.
a. hard (brittle)
b. soft (spongy)
c. swollen
d. all of the above d. all of the above
Which of the following is not a true statement about thermostats?
a. Faulty thermostats are often the cause of air pockets in the coolant passages.
b. They can also cause an increase in fuel consumption and poor engine performance.
c. If the thermostat is stuck open, the coolant may not reach the desired temperature because
it is cooled before it gets hot.
d. If a thermostat is stuck closed, coolant will not flow between the engine and radiator and the
engine will quickly overheat. a. Faulty thermostats are often the cause of air pockets in the
coolant passages.
An engine overheats in traffic but is fine when driving: Technician A says a faulty thermostat
may be the cause. Technician B says the fan clutch could be the cause. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B b. Technician B
Technician A says that excessive engine-oil consumption can be caused by low oil levels.
Technician B says that excessive oil consumption can be caused by worn valve guides. Who is
correct?
a. Technician A
b. Technician B
c. Both A and B
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Technician A says that aluminum expands at a different rate than cast iron. Technician B says
that cast iron has a coefficient of thermal expansion two or three times greater than aluminum.
Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B a. Technician A
While discussing proper engine break-in: Technician A says that the engine should run at idle
speed for at least 2 hours. Technician B says that the engine should be accelerated from a stop
at full throttle to 50 mph and that this cycle should be repeated at least ten times. Who is
correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B d. Neither A nor B
While tightening a TTY bolt: Technician A initially tightens the bolt to the specified torque.
Technician B turns the bolt an additional amount after the bolt has been tightened to the
specified torque. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B c. Both A and B
,Before reusing head or other critical bolts: Technician A measures their length and compares
the measurement to specifications. Technician B lubricates the threads and the bottom of the
bolt head with engine oil before installing them. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B c. Both A and B
While selecting the proper RTV for a particular application: Technician A uses RTV in a black
tube for all high-temperature applications. Technician B uses RTV in a red tube for most general
applications. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B d. Neither A nor B
The presence of air in the cooling system indicates the head gasket is faulty.
a. True b. False b. False
Oil pressure is determined by whether the pump is a gear type or rotor type and by oil
clearances, the pump's pressure regulator valve, and oil viscosity.
a. True b. False b. False
To eliminate the drain of engine power during times when cooling fan operation is not needed,
many of today's belt-driven fans have a fan clutch that prevents the operation of the fan when
the engine and radiator are heated up.
a. True b. False b. False
,Which of the following is a function of the engine's lubrication system?
a. Holds an adequate supply of oil
b. Removes contaminants from the oil
c. Delivers oil to all necessary areas of the engine
d. All of the above d. All of the above
For every pound of pressure put on engine coolant, the boiling point of the coolant is raised
about ___.
a. 2°F (1.1°C)
b. 3°F (1.6°C)
c. 4°F (2.2°C)
d. 5°F (2.7°C) b. 3°F (1.6°C)
Which is not a typical method of driving the water pump?
a. Accessory drive belt
b. Electric motor
c. Hydraulic motor
d. Timing belt c. Hydraulic motor
Which of the following is not an effective way to determine if an engine has an internal coolant
leak?
a. Performing a pressure test on the system
b. Visually inspecting the exhaust, coolant, and engine oil
c. Using a dye penetrant and black light
d. Using a combustion leak tester c. Using a dye penetrant and black light
, Cooling system hoses should be replaced when they are ___.
a. hard (brittle)
b. soft (spongy)
c. swollen
d. all of the above d. all of the above
Which of the following is not a true statement about thermostats?
a. Faulty thermostats are often the cause of air pockets in the coolant passages.
b. They can also cause an increase in fuel consumption and poor engine performance.
c. If the thermostat is stuck open, the coolant may not reach the desired temperature because
it is cooled before it gets hot.
d. If a thermostat is stuck closed, coolant will not flow between the engine and radiator and the
engine will quickly overheat. a. Faulty thermostats are often the cause of air pockets in the
coolant passages.
An engine overheats in traffic but is fine when driving: Technician A says a faulty thermostat
may be the cause. Technician B says the fan clutch could be the cause. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B b. Technician B
Technician A says that excessive engine-oil consumption can be caused by low oil levels.
Technician B says that excessive oil consumption can be caused by worn valve guides. Who is
correct?
a. Technician A
b. Technician B
c. Both A and B
