AUTO 125 Final Exam Questions with
100% Correct Answers Latest Version
Graded A+
Which of the following statements is true?
The only time it is safe to work under a car that is lifted up is when
it is supported by jack stands.
Which of the following lists the four strokes of an internal
combustion engine in the correct order?
intake, compression, power, exhaust
A camshaft must turn exactly ___________ as the crankshaft.
half as fast
What is the name of the engine component that converts the
reciprocal motion of the pistons into the rotary motion
needed to turn the wheels?
crankshaft
Which of the following statements is FALSE?
Because changing a timing belt or a timing chain is easy, anyone
with a set of tools could probably do it successfully.
It usually makes more sense economically to wait until the
timing belt breaks to replace it rather than paying to have it
changed earlier.
False
The engine shown is which type?
inline
Which of the following engine components pushes the
valves open?
camshaft
Why is the compression stroke important to proper engine
operation?
,Both A and B are correct
A certain engine was found to have bent valves and a broken
piston. This was most likely caused by:
A broken timing belt
What is the best way for a car owner to find out what types of
fluids to use and how often the engine's oil, coolant, and
timing components should be changed?
Check the owner's manual
What determines the size of an engine?
The volume of the cylinders
During the compression stroke:
Both valves are closed
Which of the following statements is true about the intake
stroke?
The piston travels down in the cylinder.
What is the name of the component that synchronizes the
camshaft and the crankshaft so that the right valves open
during the right stroke?
Timing chain or timing belt
What would likely be the result if the radiator fan quit
working?
The coolant would overheat when driving slowly or stopped.
In most climates, what is the recommended ratio for mixing
antifreeze and water?
50% antifreeze / 50% water
How often do most professionals recommend that you
change your engine oil and filter?
Every 3 months or 3,000 miles (whichever comes first)
Which of the following is not part of regular cooling system
care & maintenance?
Add water or coolant weekly.
Which of the following engine oils is considered the
"thinnest" oil?
, 5W-30
Suppose you are checking the level of coolant in your
cooling system. Where should you look first?
Look at the level in the coolant reservoir.
Engine coolant typically lasts the lifetime of the vehicle and
never needs to be changed.
False
If the oil level on your dipstick is at the add mark, how much
oil should be added to bring it to the full mark?
1 quart
Student A says that the purpose of the cooling system is to
keep the engine from getting too hot. Student B says that the
purpose of the cooling system is to help the engine warm up
as fast as possible. Who is correct?
Both Student A and Student B
Which of the following statements about checking engine oil
is FALSE?
The engine should be running when checking the oil level.
Which of the following driving conditions does not shorten
the life of your engine oil?
Highway driving
What is the job of the water pump?
To circulate the coolant through the cooling system
Technician A says that belts should be inspected periodically
and replaced at every 60,000 miles. Technician B says that
they should be inspected and tightened at every oil change,
but will not need to ever be changed. Who is correct?
Technician A
What should you do if your temperature warning light comes
on or if your temperature gauge indicates that your engine is
getting too hot?
Pull over and turn off your engine immediately.
100% Correct Answers Latest Version
Graded A+
Which of the following statements is true?
The only time it is safe to work under a car that is lifted up is when
it is supported by jack stands.
Which of the following lists the four strokes of an internal
combustion engine in the correct order?
intake, compression, power, exhaust
A camshaft must turn exactly ___________ as the crankshaft.
half as fast
What is the name of the engine component that converts the
reciprocal motion of the pistons into the rotary motion
needed to turn the wheels?
crankshaft
Which of the following statements is FALSE?
Because changing a timing belt or a timing chain is easy, anyone
with a set of tools could probably do it successfully.
It usually makes more sense economically to wait until the
timing belt breaks to replace it rather than paying to have it
changed earlier.
False
The engine shown is which type?
inline
Which of the following engine components pushes the
valves open?
camshaft
Why is the compression stroke important to proper engine
operation?
,Both A and B are correct
A certain engine was found to have bent valves and a broken
piston. This was most likely caused by:
A broken timing belt
What is the best way for a car owner to find out what types of
fluids to use and how often the engine's oil, coolant, and
timing components should be changed?
Check the owner's manual
What determines the size of an engine?
The volume of the cylinders
During the compression stroke:
Both valves are closed
Which of the following statements is true about the intake
stroke?
The piston travels down in the cylinder.
What is the name of the component that synchronizes the
camshaft and the crankshaft so that the right valves open
during the right stroke?
Timing chain or timing belt
What would likely be the result if the radiator fan quit
working?
The coolant would overheat when driving slowly or stopped.
In most climates, what is the recommended ratio for mixing
antifreeze and water?
50% antifreeze / 50% water
How often do most professionals recommend that you
change your engine oil and filter?
Every 3 months or 3,000 miles (whichever comes first)
Which of the following is not part of regular cooling system
care & maintenance?
Add water or coolant weekly.
Which of the following engine oils is considered the
"thinnest" oil?
, 5W-30
Suppose you are checking the level of coolant in your
cooling system. Where should you look first?
Look at the level in the coolant reservoir.
Engine coolant typically lasts the lifetime of the vehicle and
never needs to be changed.
False
If the oil level on your dipstick is at the add mark, how much
oil should be added to bring it to the full mark?
1 quart
Student A says that the purpose of the cooling system is to
keep the engine from getting too hot. Student B says that the
purpose of the cooling system is to help the engine warm up
as fast as possible. Who is correct?
Both Student A and Student B
Which of the following statements about checking engine oil
is FALSE?
The engine should be running when checking the oil level.
Which of the following driving conditions does not shorten
the life of your engine oil?
Highway driving
What is the job of the water pump?
To circulate the coolant through the cooling system
Technician A says that belts should be inspected periodically
and replaced at every 60,000 miles. Technician B says that
they should be inspected and tightened at every oil change,
but will not need to ever be changed. Who is correct?
Technician A
What should you do if your temperature warning light comes
on or if your temperature gauge indicates that your engine is
getting too hot?
Pull over and turn off your engine immediately.
