Manitoba Automotive Service Technician
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of engine oil?
A. To cool the engine
B. To clean the fuel system
C. To reduce friction between moving parts
D. To increase compression
Engine oil lubricates moving components, minimizing friction and
wear.
2. What component controls the opening and closing of engine
valves?
A. Pistons
B. Crankshaft
C. Camshaft
D. Flywheel
The camshaft operates the valves in proper timing with engine
rotation.
3. A weak battery is most likely to cause which symptom?
A. Engine overheating
B. Poor braking performance
C. Slow or no engine cranking
, D. Excessive exhaust smoke
A weak battery cannot supply enough current to the starter motor.
4. What tool is best used to measure cylinder bore wear?
A. Feeler gauge
B. Micrometer
C. Dial bore gauge
D. Vernier caliper
A dial bore gauge accurately measures internal cylinder diameter
and taper.
5. What is the function of the oxygen sensor?
A. Measures engine temperature
B. Controls ignition timing
C. Monitors exhaust oxygen content
D. Measures fuel pressure
The oxygen sensor helps adjust the air-fuel ratio for efficient
combustion.
6. Which cooling system component regulates engine operating
temperature?
A. Water pump
B. Radiator
C. Thermostat
D. Cooling fan
The thermostat opens and closes to control coolant flow based on
temperature.
7. A misfire under load is commonly caused by:
A. Low tire pressure
B. Faulty ignition coil
, C. Clogged cabin filter
D. Worn brake pads
Ignition coil failure reduces spark strength, especially under load.
8. What type of brake system uses hydraulic pressure?
A. Parking brake
B. Engine brake
C. Service brake
D. Exhaust brake
Service brakes rely on hydraulic pressure to apply braking force.
9. What does ABS stand for?
A. Automatic Braking System
B. Advanced Brake Setup
C. Anti-lock Braking System
D. Assisted Brake Suspension
ABS prevents wheel lock-up during hard braking.
10. Which component converts chemical energy into electrical
energy?
A. Alternator
B. Starter
C. Battery
D. Ignition coil
The battery stores chemical energy and converts it into electrical
energy.
11. Excessive steering wheel play is most often caused by:
A. Worn tires
B. Low coolant
C. Worn steering linkage
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of engine oil?
A. To cool the engine
B. To clean the fuel system
C. To reduce friction between moving parts
D. To increase compression
Engine oil lubricates moving components, minimizing friction and
wear.
2. What component controls the opening and closing of engine
valves?
A. Pistons
B. Crankshaft
C. Camshaft
D. Flywheel
The camshaft operates the valves in proper timing with engine
rotation.
3. A weak battery is most likely to cause which symptom?
A. Engine overheating
B. Poor braking performance
C. Slow or no engine cranking
, D. Excessive exhaust smoke
A weak battery cannot supply enough current to the starter motor.
4. What tool is best used to measure cylinder bore wear?
A. Feeler gauge
B. Micrometer
C. Dial bore gauge
D. Vernier caliper
A dial bore gauge accurately measures internal cylinder diameter
and taper.
5. What is the function of the oxygen sensor?
A. Measures engine temperature
B. Controls ignition timing
C. Monitors exhaust oxygen content
D. Measures fuel pressure
The oxygen sensor helps adjust the air-fuel ratio for efficient
combustion.
6. Which cooling system component regulates engine operating
temperature?
A. Water pump
B. Radiator
C. Thermostat
D. Cooling fan
The thermostat opens and closes to control coolant flow based on
temperature.
7. A misfire under load is commonly caused by:
A. Low tire pressure
B. Faulty ignition coil
, C. Clogged cabin filter
D. Worn brake pads
Ignition coil failure reduces spark strength, especially under load.
8. What type of brake system uses hydraulic pressure?
A. Parking brake
B. Engine brake
C. Service brake
D. Exhaust brake
Service brakes rely on hydraulic pressure to apply braking force.
9. What does ABS stand for?
A. Automatic Braking System
B. Advanced Brake Setup
C. Anti-lock Braking System
D. Assisted Brake Suspension
ABS prevents wheel lock-up during hard braking.
10. Which component converts chemical energy into electrical
energy?
A. Alternator
B. Starter
C. Battery
D. Ignition coil
The battery stores chemical energy and converts it into electrical
energy.
11. Excessive steering wheel play is most often caused by:
A. Worn tires
B. Low coolant
C. Worn steering linkage
