Engine Repair Final Exam ACTUAL Exam
Questions and CORRECT Answers
Which of the following is not a common engine construction material?
a. Aluminum
b. Carbon fiber
c. Cast iron
d. Magnesium - CORRECT ANSWER- ✔✔b. Carbon fiber
Technician A says engines can be classified by their number of operating cycles. Technician
B says engines are classified by the type of valvetrain used. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔c. Both A and B
How many degrees of crankshaft rotation are required to complete one complete combustion
cycle?
a. 180
b. 360
c. 540
d. 720 - CORRECT ANSWER- ✔✔d. 720
Technician A says most engines rotate in the clockwise direction. Technician B says most
engines rotate in the counterclockwise direction. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔b. Technician B
All of the following statements about compression ratio or correct except:
,a. Increased compression ratios require high-octane fuel
b. Carbon deposits decrease compression ratio
c. Compression ratio is based on piston stroke
d. Increasing compression ratio can increase power output - CORRECT ANSWER- ✔✔b.
Carbon deposits decrease compression ratio
Technician A says the Atkinson cycle reduces displacement and compression. Technician B
says the Atkinson cycle shortens the compression stroke. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔c. Both A and B
All of the following are advantages of diesel engines except:
a. Diesel engines use less fuel than gasoline engines
b. Improved cold-weather starting capability
c. Increased durability compared to gasoline engines
d. Increased combustion efficiency - CORRECT ANSWER- ✔✔b. Improved cold weather
starting capability
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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔c. At the top of the
cylinder
Questions and CORRECT Answers
Which of the following is not a common engine construction material?
a. Aluminum
b. Carbon fiber
c. Cast iron
d. Magnesium - CORRECT ANSWER- ✔✔b. Carbon fiber
Technician A says engines can be classified by their number of operating cycles. Technician
B says engines are classified by the type of valvetrain used. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔c. Both A and B
How many degrees of crankshaft rotation are required to complete one complete combustion
cycle?
a. 180
b. 360
c. 540
d. 720 - CORRECT ANSWER- ✔✔d. 720
Technician A says most engines rotate in the clockwise direction. Technician B says most
engines rotate in the counterclockwise direction. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔b. Technician B
All of the following statements about compression ratio or correct except:
,a. Increased compression ratios require high-octane fuel
b. Carbon deposits decrease compression ratio
c. Compression ratio is based on piston stroke
d. Increasing compression ratio can increase power output - CORRECT ANSWER- ✔✔b.
Carbon deposits decrease compression ratio
Technician A says the Atkinson cycle reduces displacement and compression. Technician B
says the Atkinson cycle shortens the compression stroke. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A or B - CORRECT ANSWER- ✔✔c. Both A and B
All of the following are advantages of diesel engines except:
a. Diesel engines use less fuel than gasoline engines
b. Improved cold-weather starting capability
c. Increased durability compared to gasoline engines
d. Increased combustion efficiency - CORRECT ANSWER- ✔✔b. Improved cold weather
starting capability
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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔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 - CORRECT ANSWER- ✔✔c. At the top of the
cylinder
