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ASE test T2 Practice test 2 Questions and Correct
Answers/ Latest Update / Already Graded
A diesel engine is using too much oil. All of the following could be the cause EXCEPT
A. Worn piston rings
B. Worn valve guides
C. Worn valve seats
D. Loose oil pan fasteners
Ans: C. Worn valve seats (work valve seats can cause low compression, but will
not cause oil consumption)
Which of the following would be used to check liner installed height?
A. Dial indicator/ Sled gage
B. Inside micrometer
C. Outside micrometer
D. Dial caliper
Ans: A. Dial indicator/ Sled gage ( A Dial indicator, sometimes known as a sled
gage, is normally used to check liner installed height)
The fuel drains back to the tank after sitting overnight, which of the following could
be the cause?
A. A stuck open return check valve
B. A stuck closed return check valve
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C. A restricted supply line
D. A restricted return live
Ans: A. A stuck open return check valve ( A stuck open return check valve can
allow fuel to drain back to the tank if the return line is not in submerged fuel)
In reference to the illustration technician A says that when replacing a turbocharger
assembly, the drain line should be checked for restriction. Technician B says that
turbochargers are often recored by replacing the center housing as a unit and
reusing the old compressor and turbine housing, who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A or B
Ans: C. Both A and B (both technicians are correct. When replacing a turbo
charger, it is a good practice to inspect the oil supply and return lines to ensure
proper lubricant flow at the replacement turbo charger. This can reduce the chances
of the replacement turbo failing. Technician B is also correct. Turbo chargers can
recored; this helps to reduce repair costs, requiring can only be performed if both
the turbine and impeller housing's are in good condition).
A diesel engine shows an abnormally high reading on the temperature gauge, and
the top radiator hose is cold. which of the following is the most likely cause?
A. Stuck open thermostat
B. Stuck closed thermostat
C. Restricted radiator
D. Restricted charge air cooler
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Ans: B. Stuck closed thermostat ( A stuck closed thermostat would allow the engine
to overheat and the top radiator hose to be cold because the coolant is not
circulating)
The regulating valve on a fuel injection pump is stuck open. This will result in:
A. Low fuel-supply pressure
B. High fuel-supply pressure
C. Engine overheating
D. Low oil pressure
Ans: A. Low fuel-supply pressure ( The regulating valve helps to hold pressure in
the low pressure fuel system; if it were stuck open, the fuel pressure would be low)
A diesel engine that has high oil consumption also has oil in the charge air cooler.
Technician A says the air compressor oil drain line may be restricted. Technician B
says the turbocharger oil drain line may be restricted. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Ans: B. B only (Only Technician B is correct. A restricted turbo oil drain in line can
cause the turbo seals to leak and allow oil to travel into the charge air cooler.)
A diesel engine equipped with a common-rail fuel system blows excessive smoke.
Technician A says the boost pressure sensor may be faulty. Technician B says the
coolant temperature sensor may be faulty. Who is correct?
ASE test T2 Practice test 2 Questions and Correct
Answers/ Latest Update / Already Graded
A diesel engine is using too much oil. All of the following could be the cause EXCEPT
A. Worn piston rings
B. Worn valve guides
C. Worn valve seats
D. Loose oil pan fasteners
Ans: C. Worn valve seats (work valve seats can cause low compression, but will
not cause oil consumption)
Which of the following would be used to check liner installed height?
A. Dial indicator/ Sled gage
B. Inside micrometer
C. Outside micrometer
D. Dial caliper
Ans: A. Dial indicator/ Sled gage ( A Dial indicator, sometimes known as a sled
gage, is normally used to check liner installed height)
The fuel drains back to the tank after sitting overnight, which of the following could
be the cause?
A. A stuck open return check valve
B. A stuck closed return check valve
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C. A restricted supply line
D. A restricted return live
Ans: A. A stuck open return check valve ( A stuck open return check valve can
allow fuel to drain back to the tank if the return line is not in submerged fuel)
In reference to the illustration technician A says that when replacing a turbocharger
assembly, the drain line should be checked for restriction. Technician B says that
turbochargers are often recored by replacing the center housing as a unit and
reusing the old compressor and turbine housing, who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A or B
Ans: C. Both A and B (both technicians are correct. When replacing a turbo
charger, it is a good practice to inspect the oil supply and return lines to ensure
proper lubricant flow at the replacement turbo charger. This can reduce the chances
of the replacement turbo failing. Technician B is also correct. Turbo chargers can
recored; this helps to reduce repair costs, requiring can only be performed if both
the turbine and impeller housing's are in good condition).
A diesel engine shows an abnormally high reading on the temperature gauge, and
the top radiator hose is cold. which of the following is the most likely cause?
A. Stuck open thermostat
B. Stuck closed thermostat
C. Restricted radiator
D. Restricted charge air cooler
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Ans: B. Stuck closed thermostat ( A stuck closed thermostat would allow the engine
to overheat and the top radiator hose to be cold because the coolant is not
circulating)
The regulating valve on a fuel injection pump is stuck open. This will result in:
A. Low fuel-supply pressure
B. High fuel-supply pressure
C. Engine overheating
D. Low oil pressure
Ans: A. Low fuel-supply pressure ( The regulating valve helps to hold pressure in
the low pressure fuel system; if it were stuck open, the fuel pressure would be low)
A diesel engine that has high oil consumption also has oil in the charge air cooler.
Technician A says the air compressor oil drain line may be restricted. Technician B
says the turbocharger oil drain line may be restricted. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Ans: B. B only (Only Technician B is correct. A restricted turbo oil drain in line can
cause the turbo seals to leak and allow oil to travel into the charge air cooler.)
A diesel engine equipped with a common-rail fuel system blows excessive smoke.
Technician A says the boost pressure sensor may be faulty. Technician B says the
coolant temperature sensor may be faulty. Who is correct?
