AUTOMOTIVE ENGINE REPAIR
EXAM QUESTIONS AND THEIR
REVIEWED SOLUTIONS
Today's powertrains require:
a. More maintenance
b. Bigger engine sizes
c. More fuel
d. Less Fuel
d. Less Fuel
The engine is often described as a(n):
a. Water pump
b. Air pump
c. Impeller
d. Gear driver
b. Air pump
Technician A says that the more air an engine can
take in, the more power it can put out. Technician B
says that the exhaust can affect how well an engine
can breathe. Who is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
c. Both A and B
Technician A says the piston is connected to the
crankshaft by the rocker arm. Technician B says the
,connecting rod converts the reciprocating motion of
the piston to the rotary motion of the crankshaft. Who
is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
b. B only
The cylinder head forms the top of the
a. Cylinder
b. Combustion chamber
c. Intake manifold
d. Throttle bore
b. Combustion chamber
When a spark ignites the air and fuel mixture, ____
occurs.
a. An explosion
b. A blast
c. Conflagration
d. Combustion
d. Combustion
The ____ is the main supporting structure of the
engine.
a. Motor
b. Block
c. Cylinder head
d. Main bore
b. Block
Technician A says the main bearings protect the
crankshaft journals. Technician B says the camshaft
lobes lift the pistons. Who is correct?
,a. A only
b. B only
c. Both A and B
d. Neither A nor B
a. A only
Which of the following is true?
a. The crankshaft rotates at the same speed as the
camshaft.
b. The camshaft rotates twice as fast as the
crankshaft.
c. The camshaft rotates three times as fast as the
crankshaft.
d. The crankshaft rotates twice as fast as the
camshaft.
d. The crankshaft rotates twice as fast as the camshaft.
Valve timing is
a. When the spark occurs
b. When the pistons rotate
c. When the valves open and close
d. How long combustion takes
c. When the valves open and close
The __________ of modern engines has (have)
decreased more than 90 percent from earlier models.
emissions
A difference in air pressure produces the movement
of fresh air into the __________ through the intake
system.
combustion chamber
The PCM controls ________ and __________ among
other functions.
fuel delivery, spark timing
, The _________ distributes air equally to each cylinder.
intake manifold
The oil pump may be driven off the front of the
________.
crankshaft
When the thermostat opens, coolant flows through the
________.
radiator
The ________ connects the cylinder head to the
exhaust system.
exhaust manifold
The_______ and _______ are compressed in the
combustion chamber.
air, fuel
The ______ opens and closes the valves.
valvetrain
The ________ holds the crankshaft.
engine block
One combustion cycle is completed every _______
degrees of crankshaft revolution.
a. 720
b. 360
c. 180
d. 90
a. 720
All of the following is true about the intake stroke,
EXCEPT:
a. The intake valve is open
b. The exhaust valve is closed
c. The piston is moving upward.
d. The air/fuel mixture is drawn into the cylinder.
EXAM QUESTIONS AND THEIR
REVIEWED SOLUTIONS
Today's powertrains require:
a. More maintenance
b. Bigger engine sizes
c. More fuel
d. Less Fuel
d. Less Fuel
The engine is often described as a(n):
a. Water pump
b. Air pump
c. Impeller
d. Gear driver
b. Air pump
Technician A says that the more air an engine can
take in, the more power it can put out. Technician B
says that the exhaust can affect how well an engine
can breathe. Who is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
c. Both A and B
Technician A says the piston is connected to the
crankshaft by the rocker arm. Technician B says the
,connecting rod converts the reciprocating motion of
the piston to the rotary motion of the crankshaft. Who
is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
b. B only
The cylinder head forms the top of the
a. Cylinder
b. Combustion chamber
c. Intake manifold
d. Throttle bore
b. Combustion chamber
When a spark ignites the air and fuel mixture, ____
occurs.
a. An explosion
b. A blast
c. Conflagration
d. Combustion
d. Combustion
The ____ is the main supporting structure of the
engine.
a. Motor
b. Block
c. Cylinder head
d. Main bore
b. Block
Technician A says the main bearings protect the
crankshaft journals. Technician B says the camshaft
lobes lift the pistons. Who is correct?
,a. A only
b. B only
c. Both A and B
d. Neither A nor B
a. A only
Which of the following is true?
a. The crankshaft rotates at the same speed as the
camshaft.
b. The camshaft rotates twice as fast as the
crankshaft.
c. The camshaft rotates three times as fast as the
crankshaft.
d. The crankshaft rotates twice as fast as the
camshaft.
d. The crankshaft rotates twice as fast as the camshaft.
Valve timing is
a. When the spark occurs
b. When the pistons rotate
c. When the valves open and close
d. How long combustion takes
c. When the valves open and close
The __________ of modern engines has (have)
decreased more than 90 percent from earlier models.
emissions
A difference in air pressure produces the movement
of fresh air into the __________ through the intake
system.
combustion chamber
The PCM controls ________ and __________ among
other functions.
fuel delivery, spark timing
, The _________ distributes air equally to each cylinder.
intake manifold
The oil pump may be driven off the front of the
________.
crankshaft
When the thermostat opens, coolant flows through the
________.
radiator
The ________ connects the cylinder head to the
exhaust system.
exhaust manifold
The_______ and _______ are compressed in the
combustion chamber.
air, fuel
The ______ opens and closes the valves.
valvetrain
The ________ holds the crankshaft.
engine block
One combustion cycle is completed every _______
degrees of crankshaft revolution.
a. 720
b. 360
c. 180
d. 90
a. 720
All of the following is true about the intake stroke,
EXCEPT:
a. The intake valve is open
b. The exhaust valve is closed
c. The piston is moving upward.
d. The air/fuel mixture is drawn into the cylinder.
