Michigan ASE Automotive Technician Exam
question with correct answers
(100% verified answers) plus rationales Q &A
2026 INSTANT DOWNLOAD PDF
1. What is the primary function of a piston ring?
A. Cool the cylinder head
B. Seal combustion pressure
C. Increase fuel pressure
D. Control ignition timing
Correct Answer: B. Piston rings seal combustion pressure, control oil, and transfer
heat to the cylinder wall.
2. A technician measures low compression in one cylinder. What is the most
likely cause?
A. Worn piston rings
B. Weak battery
C. Faulty alternator
D. Dirty air filter
Correct Answer: A. Worn rings allow combustion gases to escape, reducing
compression.
3. What component stores electrical energy for starting the vehicle?
A. Alternator
B. Starter
,C. Battery
D. Ignition coil
Correct Answer: C. The battery supplies electrical energy for engine cranking.
4. A slipping automatic transmission is commonly caused by:
A. Low transmission fluid
B. Overinflated tires
C. Dirty spark plugs
D. Weak horn relay
Correct Answer: A. Insufficient fluid reduces hydraulic pressure and clutch
engagement.
5. Which brake component converts hydraulic pressure into mechanical force?
A. Rotor
B. Master cylinder
C. Wheel cylinder
D. Brake pedal
Correct Answer: C. Wheel cylinders apply force to brake shoes in drum brakes.
6. The alternator's primary purpose is to:
A. Start the engine
B. Recharge the battery
C. Lubricate bearings
D. Increase compression
Correct Answer: B. The alternator supplies electrical power and recharges the
battery.
7. Excessive steering wheel play may indicate worn:
A. Ball joints
B. Tie-rod ends
C. Brake pads
D. Spark plugs
, Correct Answer: B. Worn tie-rod ends create looseness in steering linkage.
8. What does ABS stand for?
A. Automatic Brake System
B. Anti-lock Braking System
C. Automatic Balance Sensor
D. Advanced Brake Switch
Correct Answer: B. ABS prevents wheel lockup during hard braking.
9. Which sensor measures oxygen content in exhaust gases?
A. MAP sensor
B. TPS sensor
C. Oxygen sensor
D. CKP sensor
Correct Answer: C. The oxygen sensor monitors exhaust oxygen for fuel control.
10. A no-crank condition with dim headlights usually indicates:
A. Weak battery
B. Bad thermostat
C. Clogged injector
D. Broken axle
Correct Answer: A. Dim lights and no crank commonly point to low battery
voltage.
11. What is the purpose of engine oil?
A. Increase fuel economy only
B. Lubricate moving parts
C. Charge the battery
D. Cool the radiator
Correct Answer: B. Oil reduces friction and wear between moving parts.
12. A thermostat stuck open causes:
question with correct answers
(100% verified answers) plus rationales Q &A
2026 INSTANT DOWNLOAD PDF
1. What is the primary function of a piston ring?
A. Cool the cylinder head
B. Seal combustion pressure
C. Increase fuel pressure
D. Control ignition timing
Correct Answer: B. Piston rings seal combustion pressure, control oil, and transfer
heat to the cylinder wall.
2. A technician measures low compression in one cylinder. What is the most
likely cause?
A. Worn piston rings
B. Weak battery
C. Faulty alternator
D. Dirty air filter
Correct Answer: A. Worn rings allow combustion gases to escape, reducing
compression.
3. What component stores electrical energy for starting the vehicle?
A. Alternator
B. Starter
,C. Battery
D. Ignition coil
Correct Answer: C. The battery supplies electrical energy for engine cranking.
4. A slipping automatic transmission is commonly caused by:
A. Low transmission fluid
B. Overinflated tires
C. Dirty spark plugs
D. Weak horn relay
Correct Answer: A. Insufficient fluid reduces hydraulic pressure and clutch
engagement.
5. Which brake component converts hydraulic pressure into mechanical force?
A. Rotor
B. Master cylinder
C. Wheel cylinder
D. Brake pedal
Correct Answer: C. Wheel cylinders apply force to brake shoes in drum brakes.
6. The alternator's primary purpose is to:
A. Start the engine
B. Recharge the battery
C. Lubricate bearings
D. Increase compression
Correct Answer: B. The alternator supplies electrical power and recharges the
battery.
7. Excessive steering wheel play may indicate worn:
A. Ball joints
B. Tie-rod ends
C. Brake pads
D. Spark plugs
, Correct Answer: B. Worn tie-rod ends create looseness in steering linkage.
8. What does ABS stand for?
A. Automatic Brake System
B. Anti-lock Braking System
C. Automatic Balance Sensor
D. Advanced Brake Switch
Correct Answer: B. ABS prevents wheel lockup during hard braking.
9. Which sensor measures oxygen content in exhaust gases?
A. MAP sensor
B. TPS sensor
C. Oxygen sensor
D. CKP sensor
Correct Answer: C. The oxygen sensor monitors exhaust oxygen for fuel control.
10. A no-crank condition with dim headlights usually indicates:
A. Weak battery
B. Bad thermostat
C. Clogged injector
D. Broken axle
Correct Answer: A. Dim lights and no crank commonly point to low battery
voltage.
11. What is the purpose of engine oil?
A. Increase fuel economy only
B. Lubricate moving parts
C. Charge the battery
D. Cool the radiator
Correct Answer: B. Oil reduces friction and wear between moving parts.
12. A thermostat stuck open causes:
