Engine Repair Final
Question 1.
Which of the following is not a common engine construction material? a. Aluminum b. Carbon fiber c. Cast iron d. Magnesium
ANSWER
b. Carbon fiber
Question 2.
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
ANSWER
c. Both A and B
Question 3.
How many degrees of crankshaft rotation are re-quired to complete one complete combustion cycle? a. 180 b. 360 c. 540 d. 720
ANSWER
d. 720
Question 4.
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
ANSWER
b. Technician B
Question 5.
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
ANSWER
b. Carbon deposits decrease compression ratio
Question 6.
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
ANSWER
c. Both A and B
, Question 7.
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
ANSWER
b. Improved cold weather starting capability
Question 8.
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
ANSWER
a. Technician A
Question 9.
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
ANSWER
b. Rotary engines
Question 10.
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
ANSWER
d. Neither A or B
Question 11.
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
ANSWER
c. Cylinder leakage test
Question 12.
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
ANSWER
a. Technician A
, Question 13.
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
ANSWER
b. Technician B
Question 14.
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
ANSWER
c. An interference engine
Question 15.
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
ANSWER
a. Water soluble cleaners
Question 16.
A short block typically includes all of the following components except: a. Crankshaft b. Connecting rods c. Flywheel d. Core plugs
ANSWER
c. Flywheel
Question 17.
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
ANSWER
b. To prevent piston damage when removing
Question 18.
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
ANSWER
c. At the top of the cylinder
Question 19.
Which of the following procedures is performed on a cylinder within acceptable wear limits? a. Boring b. Honing c. Deglazing d. All of
the above
ANSWER
c. Deglazing
Question 1.
Which of the following is not a common engine construction material? a. Aluminum b. Carbon fiber c. Cast iron d. Magnesium
ANSWER
b. Carbon fiber
Question 2.
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
ANSWER
c. Both A and B
Question 3.
How many degrees of crankshaft rotation are re-quired to complete one complete combustion cycle? a. 180 b. 360 c. 540 d. 720
ANSWER
d. 720
Question 4.
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
ANSWER
b. Technician B
Question 5.
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
ANSWER
b. Carbon deposits decrease compression ratio
Question 6.
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
ANSWER
c. Both A and B
, Question 7.
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
ANSWER
b. Improved cold weather starting capability
Question 8.
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
ANSWER
a. Technician A
Question 9.
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
ANSWER
b. Rotary engines
Question 10.
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
ANSWER
d. Neither A or B
Question 11.
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
ANSWER
c. Cylinder leakage test
Question 12.
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
ANSWER
a. Technician A
, Question 13.
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
ANSWER
b. Technician B
Question 14.
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
ANSWER
c. An interference engine
Question 15.
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
ANSWER
a. Water soluble cleaners
Question 16.
A short block typically includes all of the following components except: a. Crankshaft b. Connecting rods c. Flywheel d. Core plugs
ANSWER
c. Flywheel
Question 17.
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
ANSWER
b. To prevent piston damage when removing
Question 18.
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
ANSWER
c. At the top of the cylinder
Question 19.
Which of the following procedures is performed on a cylinder within acceptable wear limits? a. Boring b. Honing c. Deglazing d. All of
the above
ANSWER
c. Deglazing
