ASE Test T2 Practice Test 2 Exam 55 Questions
Answers.
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 - Correct Answer 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 - Correct Answer 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
C. A restricted supply line
D. A restricted return live - Correct Answer 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 - Correct Answer 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 - Correct Answer 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 - Correct Answer 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 - Correct Answer 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?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only (Only Technician A is correct. A failed
boost pressure sensor could cause the electronic control module (ECM) to over-fuel the
engine, resulting in black smoke)
All of the following must be checked after a diesel cylinder head has been milled
EXCEPT:
A. Injector tip protrusion
B. Intake valve head protrusion
Answers.
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 - Correct Answer 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 - Correct Answer 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
C. A restricted supply line
D. A restricted return live - Correct Answer 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 - Correct Answer 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 - Correct Answer 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 - Correct Answer 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 - Correct Answer 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?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only (Only Technician A is correct. A failed
boost pressure sensor could cause the electronic control module (ECM) to over-fuel the
engine, resulting in black smoke)
All of the following must be checked after a diesel cylinder head has been milled
EXCEPT:
A. Injector tip protrusion
B. Intake valve head protrusion
