ENGINE REPAIR Actual Exam Questions
with 100% Correct Answers Latest Update
2025 Grade A+
Technician A says in a series hybrid, the electric motor drives the wheels.
Technician B says in a series hybrid, the wheels are driven by the internal
combustion engine only. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
Ans: a. Technician A
Which of the following is not a high-efficiency low-emission engine design?
a. Stratified charge engines
b. Rotary engines
c. Homogenous charge engines
d. Variable compression engines
Ans: b. Rotary engines
A four-cylinder late model engine has low cranking dry and wet compression
readings on one cylinder. Technician A says a worn camshaft lobe could be the
cause. Technician B says worn valve seats could be the cause. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
,d. Neither A or B
Ans: d. Neither A or B
Which test can be used to diagnose a head gasket leak?
a. Cylinder power balance test
b. Running compression test
c. Cylinder leakage test
d. Vacuum test
Ans: c. Cylinder leakage test
Vacuum gauge readings are being discussed. Technician A says a low but steady
vacuum reading indicates a timing problem. Technician B says a low but steady
reading indicates a restricted exhaust system. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
,Ans: a. Technician A
Technician A says when removing an engine, the A/C system must be discharged.
Technician B says on some vehicles, the A/C compressor can be unbolted and
moved aside so the system can remain charged. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
Ans: b. Technician B
An engine where the valves can contact the pistons is called:
a. A freewheeling engine
b. An overhead-cam engine
c. An interference engine
d. An Atkinson engine
Ans: c. An interference engine
Which of the following types of cleaners would not be used on petroleum-based
soils?
a. Water-soluble cleaners
b. Solvent tank cleaners
c. Hot spray tanks
d. Thermal cleaning ovens
, Ans: a. Water soluble cleaners
A short block typically includes all of the following components except:
a. Crankshaft
b. Connecting rods
c. Flywheel
d. Core plugs
Ans: c. Flywheel
Why is cylinder ridge reaming performed?
a. To aid piston installation
b. To prevent piston damage when removing
c. To correct cylinder taper wear
d. To apply the correct surface finish to the cylinder
Ans: b. To prevent piston damage when removing
Maximum cylinder wear occurs:
a. In the middle of the cylinder
b. At the bottom of the cylinder
c. At the top of the cylinder
d. Cylinder wear is the same at all points
Ans: c. At the top of the cylinder
with 100% Correct Answers Latest Update
2025 Grade A+
Technician A says in a series hybrid, the electric motor drives the wheels.
Technician B says in a series hybrid, the wheels are driven by the internal
combustion engine only. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
Ans: a. Technician A
Which of the following is not a high-efficiency low-emission engine design?
a. Stratified charge engines
b. Rotary engines
c. Homogenous charge engines
d. Variable compression engines
Ans: b. Rotary engines
A four-cylinder late model engine has low cranking dry and wet compression
readings on one cylinder. Technician A says a worn camshaft lobe could be the
cause. Technician B says worn valve seats could be the cause. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
,d. Neither A or B
Ans: d. Neither A or B
Which test can be used to diagnose a head gasket leak?
a. Cylinder power balance test
b. Running compression test
c. Cylinder leakage test
d. Vacuum test
Ans: c. Cylinder leakage test
Vacuum gauge readings are being discussed. Technician A says a low but steady
vacuum reading indicates a timing problem. Technician B says a low but steady
reading indicates a restricted exhaust system. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
,Ans: a. Technician A
Technician A says when removing an engine, the A/C system must be discharged.
Technician B says on some vehicles, the A/C compressor can be unbolted and
moved aside so the system can remain charged. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B
Ans: b. Technician B
An engine where the valves can contact the pistons is called:
a. A freewheeling engine
b. An overhead-cam engine
c. An interference engine
d. An Atkinson engine
Ans: c. An interference engine
Which of the following types of cleaners would not be used on petroleum-based
soils?
a. Water-soluble cleaners
b. Solvent tank cleaners
c. Hot spray tanks
d. Thermal cleaning ovens
, Ans: a. Water soluble cleaners
A short block typically includes all of the following components except:
a. Crankshaft
b. Connecting rods
c. Flywheel
d. Core plugs
Ans: c. Flywheel
Why is cylinder ridge reaming performed?
a. To aid piston installation
b. To prevent piston damage when removing
c. To correct cylinder taper wear
d. To apply the correct surface finish to the cylinder
Ans: b. To prevent piston damage when removing
Maximum cylinder wear occurs:
a. In the middle of the cylinder
b. At the bottom of the cylinder
c. At the top of the cylinder
d. Cylinder wear is the same at all points
Ans: c. At the top of the cylinder
