Solution Manual For Automotive Engines Repair Unit
1 Exam Questions With New Update Solutions
/. Today's powertrains require:
a. More maintenance
b. Bigger engine sizes
c. More fuel
d. Less Fuel
/.The engine is often described as a(n):
a. Water pump
b. Air pump
c. Impeller
d. Gear driver
/.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
/.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
/.The cylinder head forms the top of the
a. Cylinder
b. Combustion chamber
c. Intake manifold
d. Throttle bore
/.When a spark ignites the air and fuel mixture, ____ occurs.
a. An explosion
b. A blast
c. Conflagration
d. Combustion
,/.The ____ is the main supporting structure of the engine.
a. Motor
b. Block
c. Cylinder head
d. Main bore
/.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
/.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.
/.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
/.The __________ of modern engines has (have) decreased more than 90 percent from
earlier models. - Answer-emissions
/.A difference in air pressure produces the movement of fresh air into the __________
through the intake system. - Answer-combustion chamber
/.The PCM controls ________ and __________ among other functions. - Answer-fuel
delivery, spark timing
/.The _________ distributes air equally to each cylinder. - Answer-intake manifold
/.The oil pump may be driven off the front of the ________. - Answer-crankshaft
/.When the thermostat opens, coolant flows through the ________. - Answer-radiator
/.The ________ connects the cylinder head to the exhaust system. - Answer-exhaust
manifold
/.The_______ and _______ are compressed in the combustion chamber. - Answer-air,
fuel
, /.The ______ opens and closes the valves. - Answer-valvetrain
/.The ________ holds the crankshaft. - Answer-engine block
/.One combustion cycle is completed every _______ degrees of crankshaft revolution.
a. 720
b. 360
c. 180
d. 90
/.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.
/.Which of the following is the correct order of strokes during one cycle?
a. Intake, Exhaust, Power, Compression
b. Intake, Compression, Power, Exhaust
c. Intake, Power, Exhaust, Compression
d. Intake, Compression, Exhaust, Power
/.The inlet and exhaust ports are opened and closed by:
a. The crankshaft throws.
b. The valves.
c. The pistons.
d. None of the above.
/.The purpose of the valve springs are to:
a. Seal the valve against the seat.
b. Hold the valve open.
c. Return the rocker arm to the rest position.
d. Force the pushrod against the camshaft lobe.
/.The purpose of the camshaft lobes are to:
a. Control the timing of the valve activation.
b. Control the opening and closing of the valves.
c. All of the above.
d. None of the above.
/.The overhead camshaft engine uses pushrods to activate the rocker arms.
a. True
b. False
/.The top of the engine block carries:
a. The crankshaft.
1 Exam Questions With New Update Solutions
/. Today's powertrains require:
a. More maintenance
b. Bigger engine sizes
c. More fuel
d. Less Fuel
/.The engine is often described as a(n):
a. Water pump
b. Air pump
c. Impeller
d. Gear driver
/.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
/.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
/.The cylinder head forms the top of the
a. Cylinder
b. Combustion chamber
c. Intake manifold
d. Throttle bore
/.When a spark ignites the air and fuel mixture, ____ occurs.
a. An explosion
b. A blast
c. Conflagration
d. Combustion
,/.The ____ is the main supporting structure of the engine.
a. Motor
b. Block
c. Cylinder head
d. Main bore
/.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
/.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.
/.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
/.The __________ of modern engines has (have) decreased more than 90 percent from
earlier models. - Answer-emissions
/.A difference in air pressure produces the movement of fresh air into the __________
through the intake system. - Answer-combustion chamber
/.The PCM controls ________ and __________ among other functions. - Answer-fuel
delivery, spark timing
/.The _________ distributes air equally to each cylinder. - Answer-intake manifold
/.The oil pump may be driven off the front of the ________. - Answer-crankshaft
/.When the thermostat opens, coolant flows through the ________. - Answer-radiator
/.The ________ connects the cylinder head to the exhaust system. - Answer-exhaust
manifold
/.The_______ and _______ are compressed in the combustion chamber. - Answer-air,
fuel
, /.The ______ opens and closes the valves. - Answer-valvetrain
/.The ________ holds the crankshaft. - Answer-engine block
/.One combustion cycle is completed every _______ degrees of crankshaft revolution.
a. 720
b. 360
c. 180
d. 90
/.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.
/.Which of the following is the correct order of strokes during one cycle?
a. Intake, Exhaust, Power, Compression
b. Intake, Compression, Power, Exhaust
c. Intake, Power, Exhaust, Compression
d. Intake, Compression, Exhaust, Power
/.The inlet and exhaust ports are opened and closed by:
a. The crankshaft throws.
b. The valves.
c. The pistons.
d. None of the above.
/.The purpose of the valve springs are to:
a. Seal the valve against the seat.
b. Hold the valve open.
c. Return the rocker arm to the rest position.
d. Force the pushrod against the camshaft lobe.
/.The purpose of the camshaft lobes are to:
a. Control the timing of the valve activation.
b. Control the opening and closing of the valves.
c. All of the above.
d. None of the above.
/.The overhead camshaft engine uses pushrods to activate the rocker arms.
a. True
b. False
/.The top of the engine block carries:
a. The crankshaft.
