ASE Auto Mechanic Certification Practice Test

Take our Auto Mechanic Certification Practice Test and prepare yourself to score at your ASE auto mechanic certification exam.

By taking the ASE exam you will get a number of subject areas such as components, engines, trucks, buses, and damage repair that will test your preparedness and proficiency.

We present to you 29 questions created and managed by professionals from the field which will help you prepare.

Each question contains an explanation that will support your process of learning and revision.

ASE Auto Mechanic Certification Practice Test

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Question 1
Please mark the step that ought to be taken during replacement of brake pads when the wheels are already removed:
A
Removal of old brake pads
B
Unbolting of the caliber
C
Breakage of the lugs
D
None of the above
Question 1 Explanation: 
The next move in this operation is to unbolt the caliper.
Question 2
Please mark the problem that might occur when a low-mileage vehicle runs hot but the radiator has enough coolant:
A
The thermostat is not functioning
B
There is a partial restriction of the block
C
The water pump is broken
D
Either a or b
Question 2 Explanation: 
The most likely problem is that there is a partial restriction of the block or the water pump is broken.
Question 3
What needs to be checked first if a car is pulling to one side while driving?
A
Incorrect alignment
B
Uneven tire wear
C
A sticking brake caliper
D
Low or uneven tire pressure
Question 3 Explanation: 
If a car is pulling to one side while driving one should check if the tire pressure is low or uneven.
Question 4
"Snug, but no too hard"- is this saying applicable when you replace an oil drain plug?
A
No
B
Yes
Question 4 Explanation: 
The saying is applicable because you should retighten it the oil drain plug.
Question 5
Please mark the order of replacing spark plugs:
A
One should do an entire row at once
B
One should take from the bottom of the row, one at a time
C
One should take from the top of the row, one at a time
D
One should do all at once
Question 5 Explanation: 
One should take from the bottom of the row, one at a time when replacing spark plugs.
Question 6
What should one do when replacing a fuel tank after they have drained and stored all the gas in the vehicle?
A
One should disconnect the fuel lines.
B
One should drop the rear suspension.
C
One should take the straps of the tank and drop it.
D
None of the above
Question 6 Explanation: 
When replacing a fuel tank after they have drained and stored all the gas in the vehicle, one should disconnect the fuel lines.
Question 7
Please mark the first step of action when a vehicle comes into a shop with a transmission problem:
A
Checking the filter
B
Checking for leaks
C
Checking the fluid level
D
Checking the gears and disassembling the transmission
Question 7 Explanation: 
Checking the fluid level is the first step when vehicle comes with a transmission problem.
Question 8
What should one do during the completion of a radiator flush after they have drained the old coolant and added the flush solution?
A
One should drain the solution and add a fresh radiator coolant.
B
One should turn the heater on and let it run at the highest setting for 10 minutes.
C
One should turn the vehicle on and let it run until it gets to a normal operating temperature.
D
None of the above.
Question 8 Explanation: 
One should turn the vehicle on and let it run until it gets to a normal operating temperature during the completion of a radiator flush after they have drained the old coolant and added the flush solution.
Question 9
Do cracks in the insulation cause problems with spark plug wires?
A
Yes
B
No
Question 9 Explanation: 
Cracks in the insulation cause problems with spark plug wires.
Question 10
Please mark the final step in a brake job:
A
Pressing the brake pedal to ensure satisfactory brake pressure
B
Replacing the caliper assembly
C
Replacing and tightening of the nuts
D
None of the above
Question 10 Explanation: 
Pressing the brake pedal to ensure satisfactory brake pressure is the final step in a brake job.
Question 11
Should an air filter be replaced before it shows visible signs of accumulated particles?
A
Yes
B
No
Question 11 Explanation: 
An air filter shouldn't be replaced before it shows visible signs of accumulated particles
Question 12
What causes black smoke mixed into the exhaust of a vehicle that one should repair?
A
A dirty air filter
B
A closed carburetor choke
C
Leaking fuel injectors
D
Any of the above
Question 12 Explanation: 
Leaking fuel injectors, closed carburetor choke, and a dirty air filter may cause black smoke.
Question 13
Please mark the impossible cause of an engine hesitating:
A
A vacuum leak in the engine
B
Clogged fuel filter
C
The need for replacement of ignition wires
D
The need for replacement of air filter
Question 13 Explanation: 
A vacuum leak in the engine cannot be the reason for an engine hesitating.
Question 14
What may cause a vehicle knocking when it goes over bumps or cracks in the road?
A
A broken tie rod
B
Shocks or struts that should be replaced.
C
A worn power steering belt
D
Low power steering fluid
Question 14 Explanation: 
Shocks or struts that should be replaced may cause a vehicle knocking when it goes over bumps or cracks in the road.
Question 15
Should a timing belt be replaced at the manufacturer's suggested interval if there is only a minor fraying?
A
Yes
B
No
Question 15 Explanation: 
A timing belt shouldn't be replaced at the manufacturer's suggested interval if there is only a minor fraying.
Question 16
Please mark the improbable cause of a misfiring engine:
A
Wrongly set ignition timing
B
Dysfunctional cooling system
C
Clogged fuel filter
D
Vacuum leak in
Question 16 Explanation: 
Dysfunctional cooling system is not likely to the cause for a misfiring engine.
Question 17
Please mark the improbable cause of a brake pedal that has to go down too far to stop?
A
Contaminated brake fluid
B
A brake line obstruction
C
Worn brake pads
D
Low brake fluid
Question 17 Explanation: 
A brake line obstruction is not likely to be a cause of this problem.
Question 18
Please mark the type of fuse regarding a car made before 1980:
A
Ceramic
B
Blade
C
Glass Tube
D
Any of the above
Question 18 Explanation: 
Ceramic is a type of fuse regarding a car made before 1980.
Question 19
Why would a car not start?
A
A bad starter
B
A bad fuse
C
A dead battery
D
A bad ignition switch
Question 19 Explanation: 
A dead battery is the most common reason a car will not start.
Question 20
Is the water pump the most important part of any vehicle's cooling system?
A
Yes
B
No
Question 20 Explanation: 
The water pump is not the most important part of any vehicle's cooling system.
Question 21
What may be the cause for a foamy and brown coolant and an engine that is using a lot of oil?
A
A leaking oil-to-water cooler
B
A blown head gasket
C
A cracked cylinder head
D
Any of the above
Question 21 Explanation: 
A leaking oil-to-water cooler, a blown head gasket or a cracked cylinder head might be the reasons for a foamy and brown coolant and an engine that is using a lot of oil.
Question 22
Please mark the spot which is not common for leakage of transmissions:
A
The filter housing
B
The drain hole under the transmission
C
The base of the filter tube
D
The mounting point of the speed sensor
Question 22 Explanation: 
The filter housing is not common for leakage of transmissions.
Question 23
Do dirty posts usually cause car battery problems?
A
Yes
B
No
Question 23 Explanation: 
Dirty posts usually are usually the cause of car battery problems.
Question 24
What is the reason for a vehicle that has difficulty with the steering?
A
There is a leakage for the power steering rack.
B
There is a need for adding power steering fluid.
C
There is a need for replacement of the power steering pump.
D
There is a need for adjustment or replacement of the power steering belt.
Question 24 Explanation: 
A vehicle has difficulty with the steering because there is probably a need for adding power steering fluid.
Question 25
Please mark the improbable reason for the appearance of check engine light in most vehicles:
A
A loose gas cap
B
A dying battery
C
A need for replacement of spark plug wires
D
A wet engine
Question 25 Explanation: 
A dying battery is very unlikely to be the reason for the appearance of check engine light in most vehicles.
Question 26
Please mark the possible cause of overconsumption of oil by an engine in case there is no oil in the exhaust:
A
Worn piston rings
B
Leaking gaskets and/or seals
C
A cracked cylinder
D
A leaking air-to-water cooler
Question 26 Explanation: 
Leaking gaskets and/or seals are the possible cause of overconsumption of oil by an engine in case there is no oil in the exhaust.
Question 27
Is 60 degrees the most efficient bank angle for a six cylinder engine?
A
Yes
B
No
Question 27 Explanation: 
60 degrees is the most efficient bank angle for a six-cylinder engine.
Question 28
Please mark the improbable cause for no or little air pressure in a brake pedal:
A
Low brake fluid
B
A bad master cylinder
C
Air in the brake fluid
D
Vacuum problems
Question 28 Explanation: 
Vacuum problems are very unlikely to cause no or little air pressure in a brake pedal.
Question 29
Please mark the probable cause for gray or blue smoke in the exhaust in a vehicle when in need for repair:
A
A mechanical problem with the engine
B
A need of replacement of the PCV valve
C
Worn out seals
D
Any of the above
Question 29 Explanation: 
Worn out seals probably cause gray or blue smoke in the exhaust of a vehicle.
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