AUTO 125 Final Exam – All Questions and 100% Correct Answers, Graded A+, Latest Update 2026

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Auto 125 Final Exam ALL QUESTIONS AND 100% CORRECT
ANSWERS ALREADY GRADED A+ - LATEST UPDATE 2026-2027
Technician A says that it is safe to clean your clothes off at the end of the day by
blowing compressed air on yourself. Technician B says that you should avoid spinning
a bearing with compressed air because it may injure or kill you. Who is correct? -
CORRECT ANSWER Technician B

QUESTION : Where can you easily find the engine size on a car? - CORRECT
ANSWER On the under-hood sticker

QUESTION : Which of the following statements about Vehicle Identification Numbers
(VINs) is FALSE? - CORRECT ANSWER Several identical cars may have the
same VIN as each other.

QUESTION : Which of the following is always found on an under-hood sticker? -
CORRECT ANSWER Model year

QUESTION : Technician A says that when jump-starting a car, you should make the
last connection on the body of the car. Technician B says that if you accidentally hook
up the jumper cables backwards, it usually won't cause any damage. Who is correct? -
CORRECT ANSWER Neither A nor B

QUESTION : It is okay to run a car inside a shop or garage if one or more of the doors
is open. - CORRECT ANSWER False

QUESTION : When jump-starting a car, where should the last jumper cable connection
be made? - CORRECT ANSWER On the metal of the engine of the "dead" car

QUESTION : Which of the following is NOT considered a rule of dressing for safety
when working on or around a car? - CORRECT ANSWER Make sure that all
rings and watches fit well and are not loose.

QUESTION : Which of the following is NOT a potential hazard associated with working
around your car's battery? - CORRECT ANSWER Electrical shock

QUESTION : Which of the following statements is correct? - CORRECT ANSWER
UPDATED exam 2026

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The left and right sides of a car are determined when you are sitting in the driver's
seat.

QUESTION : When starting a car, you should double-check that - CORRECT
ANSWER people and tools are clear of moving parts.

QUESTION : Student A says that you should fill your tires to the pressure indicated on
the sidewall of the tire. Student B says that you should fill your tires to the pressure
indicated on the tire placard near the driver's door or in the glovebox. Who is correct?
- CORRECT ANSWER Student B

QUESTION : Two technicians are discussing how to avoid connecting the cables
backwards when jump-starting (either using jumper cables or a jumper pack).
Technician A says that you can identify the positive and negative terminals on the
car's battery by looking for the polarity symbols stamped into the top of the battery.
Technician B says that you can identify the positive and negative terminals by looking
at the color of the car's battery cables. Who is correct? - CORRECT ANSWER
Technician A

QUESTION : Which of the following statements is true? - CORRECT ANSWER
The only time it is safe to work under a car that is lifted up is when it is supported by
jack stands.

QUESTION : Which of the following lists the four strokes of an internal combustion
engine in the correct order? - CORRECT ANSWER intake, compression,
power, exhaust

QUESTION : A camshaft must turn exactly ___________ as the crankshaft. -
CORRECT ANSWER half as fast

QUESTION : 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? -
CORRECT ANSWER crankshaft

QUESTION : Which of the following statements is FALSE? - CORRECT ANSWER
Because changing a timing belt or a timing chain is easy, anyone with a set of tools
could probably do it successfully.

QUESTION : It usually makes more sense economically to wait until the timing belt
UPDATED exam 2026

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breaks to replace it rather than paying to have it changed earlier. - CORRECT
ANSWER False

QUESTION : The engine shown is which type? - CORRECT ANSWER inline

QUESTION : Which of the following engine components pushes the valves open? -
CORRECT ANSWER camshaft

QUESTION : Why is the compression stroke important to proper engine operation? -
CORRECT ANSWER Both A and B are correct

QUESTION : A certain engine was found to have bent valves and a broken piston. This
was most likely caused by: - CORRECT ANSWER A broken timing belt

QUESTION : 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? - CORRECT ANSWER Check the owner's manual

QUESTION : What determines the size of an engine? - CORRECT ANSWER
The volume of the cylinders

QUESTION : During the compression stroke: - CORRECT ANSWER Both
valves are closed

QUESTION : Which of the following statements is true about the intake stroke? -
CORRECT ANSWER The piston travels down in the cylinder.

QUESTION : What is the name of the component that synchronizes the camshaft and
the crankshaft so that the right valves open during the right stroke? - CORRECT
ANSWER Timing chain or timing belt

QUESTION : What would likely be the result if the radiator fan quit working? -
CORRECT ANSWER The coolant would overheat when driving slowly or
stopped.

QUESTION : In most climates, what is the recommended ratio for mixing antifreeze
and water? - CORRECT ANSWER 50% antifreeze / 50% water

UPDATED exam 2026