AUTO MECHANICS TEST 2025 QUESTIONS
AND ANSWERS.
If a vehicle has been run without the proper air filter, which part would most
likely be damaged?
A camshaft
B fuel injector
C piston ring
D plug wire - correct answer - C
If a driver continues to ignore the dash warning message to refill a diesel vehicle
with diesel exhaust fluid (DEF), what will be the end result?
A The engine will lock up.
B The engine will overheat.
C The tailpipe will overheat.
D The vehicle will be disabled. - correct answer - D
Extremely dirty air filters can cause:
A excessive engine airflow.
B improved fuel economy.
C longer engine life.
D poor engine performance. - correct answer - D
,Where would a cabin air filter most likely be found?
A inside the passenger area
B under the hood
C inside the trunk
D under the car - correct answer - A
If a tailpipe has a rusted hole in it, which is the proper procedure to repair it?
A Clean and weld over the hole.
B Glue a patch over the hole.
C Replace the assembly.
D Wrap the hole with exhaust tape - correct answer - C
Which type of fluid most likely goes into a vehicle's engine?
A 10w30
B 20w50
C 90w
D ATF - correct answer - A
What color is associated with diesel exhaust fluid?
A blue
B green
C red
D yellow - correct answer - A
,Which part below is a component in the EVAP system?
A catalytic convertor
B fuel tank
C exhaust manifold
D radiator - correct answer - B
What is the most likely cause of a rattling sound coming from the underside of a
vehicle?
A loose radiator
B loose exhaust heat shield
C broken disc brake caliper
D rusty fuel lines - correct answer - B
Diesel exhaust fluid (DEF) is to be added to a new model diesel vehicle. The
cap on the DEF reservoir/bottle is normally:
A blue.
B green.
C white.
D yellow. - correct answer - A
Which is the federal mandated warranty period for catalytic converters?
A 3 yrs/36,000 miles
, B 8 yrs/80,000 miles
C 10 yrs/10000 miles
D 12 yrs/12000 miles - correct answer - B
If the check engine light is on for a vacuum leak, which type of inspection
would a technician perform first?
A disassemble
B heatsink
C mechanical
D visual - correct answer - D
What system is being talked about when a technician says "EVAP"?
A exhaust intake particles
B evaporative emissions
C engine valves
D exhaust leaks - correct answer - B
If the exhaust manifold on a vehicle is rusty, what should be done?
A nothing
B painting
C polishing
D sandblasting - correct answer - A
AND ANSWERS.
If a vehicle has been run without the proper air filter, which part would most
likely be damaged?
A camshaft
B fuel injector
C piston ring
D plug wire - correct answer - C
If a driver continues to ignore the dash warning message to refill a diesel vehicle
with diesel exhaust fluid (DEF), what will be the end result?
A The engine will lock up.
B The engine will overheat.
C The tailpipe will overheat.
D The vehicle will be disabled. - correct answer - D
Extremely dirty air filters can cause:
A excessive engine airflow.
B improved fuel economy.
C longer engine life.
D poor engine performance. - correct answer - D
,Where would a cabin air filter most likely be found?
A inside the passenger area
B under the hood
C inside the trunk
D under the car - correct answer - A
If a tailpipe has a rusted hole in it, which is the proper procedure to repair it?
A Clean and weld over the hole.
B Glue a patch over the hole.
C Replace the assembly.
D Wrap the hole with exhaust tape - correct answer - C
Which type of fluid most likely goes into a vehicle's engine?
A 10w30
B 20w50
C 90w
D ATF - correct answer - A
What color is associated with diesel exhaust fluid?
A blue
B green
C red
D yellow - correct answer - A
,Which part below is a component in the EVAP system?
A catalytic convertor
B fuel tank
C exhaust manifold
D radiator - correct answer - B
What is the most likely cause of a rattling sound coming from the underside of a
vehicle?
A loose radiator
B loose exhaust heat shield
C broken disc brake caliper
D rusty fuel lines - correct answer - B
Diesel exhaust fluid (DEF) is to be added to a new model diesel vehicle. The
cap on the DEF reservoir/bottle is normally:
A blue.
B green.
C white.
D yellow. - correct answer - A
Which is the federal mandated warranty period for catalytic converters?
A 3 yrs/36,000 miles
, B 8 yrs/80,000 miles
C 10 yrs/10000 miles
D 12 yrs/12000 miles - correct answer - B
If the check engine light is on for a vacuum leak, which type of inspection
would a technician perform first?
A disassemble
B heatsink
C mechanical
D visual - correct answer - D
What system is being talked about when a technician says "EVAP"?
A exhaust intake particles
B evaporative emissions
C engine valves
D exhaust leaks - correct answer - B
If the exhaust manifold on a vehicle is rusty, what should be done?
A nothing
B painting
C polishing
D sandblasting - correct answer - A
