PEI Automotive Service Technician Practice
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary function of engine oil?
A. Cool the engine
B. Clean the fuel system
C. Reduce friction between moving parts
D. Increase compression
Answer: C
Oil forms a lubricating film that reduces friction and wear between
engine components.
2. Which component controls the amount of air entering the engine?
A. Fuel injector
B. Throttle body
C. Oxygen sensor
D. Catalytic converter
Answer: B
The throttle body regulates airflow based on accelerator input.
3. What does the crankshaft position sensor monitor?
A. Engine temperature
B. Piston ring wear
C. Crankshaft speed and position
D. Oil pressure
, Answer: C
The sensor provides timing data for ignition and fuel injection.
4. A weak battery is most likely to cause which symptom?
A. Engine overheating
B. Hard or no starting
C. High fuel consumption
D. Engine knocking
Answer: B
A weak battery cannot supply sufficient current to the starter
motor.
5. What is the normal function of a thermostat?
A. Regulate oil pressure
B. Control coolant flow based on temperature
C. Increase engine power
D. Reduce exhaust emissions
Answer: B
The thermostat opens and closes to maintain proper engine
temperature.
6. Which tool is used to measure cylinder compression?
A. Vacuum gauge
B. Timing light
C. Compression tester
D. Multimeter
Answer: C
A compression tester measures pressure created in each cylinder.
7. What does ABS stand for?
A. Automatic Brake System
, B. Anti-Brake Skid
C. Anti-lock Braking System
D. Advanced Braking Setup
Answer: C
ABS prevents wheel lock-up during hard braking.
8. Which component stores electrical energy in a vehicle?
A. Alternator
B. Starter
C. Battery
D. Relay
Answer: C
The battery stores electrical energy for starting and electrical
loads.
9. Excessive blue exhaust smoke usually indicates:
A. Coolant leak
B. Oil burning
C. Rich fuel mixture
D. Exhaust restriction
Answer: B
Blue smoke is caused by engine oil entering the combustion
chamber.
10. What is the purpose of a catalytic converter?
A. Reduce engine noise
B. Increase horsepower
C. Reduce harmful exhaust emissions
D. Improve fuel economy
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary function of engine oil?
A. Cool the engine
B. Clean the fuel system
C. Reduce friction between moving parts
D. Increase compression
Answer: C
Oil forms a lubricating film that reduces friction and wear between
engine components.
2. Which component controls the amount of air entering the engine?
A. Fuel injector
B. Throttle body
C. Oxygen sensor
D. Catalytic converter
Answer: B
The throttle body regulates airflow based on accelerator input.
3. What does the crankshaft position sensor monitor?
A. Engine temperature
B. Piston ring wear
C. Crankshaft speed and position
D. Oil pressure
, Answer: C
The sensor provides timing data for ignition and fuel injection.
4. A weak battery is most likely to cause which symptom?
A. Engine overheating
B. Hard or no starting
C. High fuel consumption
D. Engine knocking
Answer: B
A weak battery cannot supply sufficient current to the starter
motor.
5. What is the normal function of a thermostat?
A. Regulate oil pressure
B. Control coolant flow based on temperature
C. Increase engine power
D. Reduce exhaust emissions
Answer: B
The thermostat opens and closes to maintain proper engine
temperature.
6. Which tool is used to measure cylinder compression?
A. Vacuum gauge
B. Timing light
C. Compression tester
D. Multimeter
Answer: C
A compression tester measures pressure created in each cylinder.
7. What does ABS stand for?
A. Automatic Brake System
, B. Anti-Brake Skid
C. Anti-lock Braking System
D. Advanced Braking Setup
Answer: C
ABS prevents wheel lock-up during hard braking.
8. Which component stores electrical energy in a vehicle?
A. Alternator
B. Starter
C. Battery
D. Relay
Answer: C
The battery stores electrical energy for starting and electrical
loads.
9. Excessive blue exhaust smoke usually indicates:
A. Coolant leak
B. Oil burning
C. Rich fuel mixture
D. Exhaust restriction
Answer: B
Blue smoke is caused by engine oil entering the combustion
chamber.
10. What is the purpose of a catalytic converter?
A. Reduce engine noise
B. Increase horsepower
C. Reduce harmful exhaust emissions
D. Improve fuel economy
