Nova Scotia 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 the catalytic converter in a vehicle?
a) Increase engine horsepower
b) Reduce emissions **
c) Improve fuel economy
d) Cool the exhaust system
The catalytic converter converts harmful gases into less harmful
emissions, reducing environmental impact.
2. What is the typical color of brake fluid that indicates it needs to be
replaced?
a) Clear
b) Red **
c) Green
d) Blue
Brake fluid darkens over time due to moisture absorption and
contamination, signaling it should be replaced.
3. Which tool is commonly used to check engine compression?
a) Torque wrench
b) Compression gauge **
,c) Multimeter
d) Feeler gauge
A compression gauge measures cylinder pressure to determine engine
health.
4. What type of engine uses a spark plug to ignite the fuel-air mixture?
a) Diesel engine
b) Gasoline engine **
c) Rotary engine
d) Steam engine
Gasoline engines rely on spark plugs for ignition, unlike diesel engines
which use compression ignition.
5. Which component is responsible for regulating voltage in a vehicle’s
charging system?
a) Battery
b) Alternator **
c) Voltage regulator **
d) Starter motor
The voltage regulator ensures the alternator outputs a consistent
voltage to protect the battery and electrical components.
6. What is the recommended method to check for worn brake pads?
a) Listen for a squealing noise **
b) Check tire pressure
c) Inspect fuel filter
d) Examine spark plugs
Squealing noises from brake pads often indicate wear, as many pads
have built-in wear indicators.
, 7. Which type of tire wear indicates under-inflation?
a) Wear on edges **
b) Wear in the center
c) Uneven patch wear
d) Feathering
Under-inflated tires wear more on the outer edges because the tire’s
contact patch increases at the sides.
8. What is the purpose of an oxygen sensor in a vehicle?
a) Measure engine oil level
b) Detect air-fuel ratio **
c) Regulate coolant temperature
d) Control brake pressure
Oxygen sensors monitor the exhaust gases to ensure the engine
maintains an optimal air-fuel ratio.
9. Which type of coolant is commonly used in modern vehicles?
a) Ethylene glycol **
b) Water only
c) Mineral oil
d) Diesel fuel
Ethylene glycol-based coolants prevent freezing and corrosion in cooling
systems.
10. What does ABS stand for in vehicle braking systems?
a) Automatic Brake Sensor
b) Anti-lock Braking System **
c) Advanced Brake Safety
d) Auxiliary Brake Support
Practice Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary function of the catalytic converter in a vehicle?
a) Increase engine horsepower
b) Reduce emissions **
c) Improve fuel economy
d) Cool the exhaust system
The catalytic converter converts harmful gases into less harmful
emissions, reducing environmental impact.
2. What is the typical color of brake fluid that indicates it needs to be
replaced?
a) Clear
b) Red **
c) Green
d) Blue
Brake fluid darkens over time due to moisture absorption and
contamination, signaling it should be replaced.
3. Which tool is commonly used to check engine compression?
a) Torque wrench
b) Compression gauge **
,c) Multimeter
d) Feeler gauge
A compression gauge measures cylinder pressure to determine engine
health.
4. What type of engine uses a spark plug to ignite the fuel-air mixture?
a) Diesel engine
b) Gasoline engine **
c) Rotary engine
d) Steam engine
Gasoline engines rely on spark plugs for ignition, unlike diesel engines
which use compression ignition.
5. Which component is responsible for regulating voltage in a vehicle’s
charging system?
a) Battery
b) Alternator **
c) Voltage regulator **
d) Starter motor
The voltage regulator ensures the alternator outputs a consistent
voltage to protect the battery and electrical components.
6. What is the recommended method to check for worn brake pads?
a) Listen for a squealing noise **
b) Check tire pressure
c) Inspect fuel filter
d) Examine spark plugs
Squealing noises from brake pads often indicate wear, as many pads
have built-in wear indicators.
, 7. Which type of tire wear indicates under-inflation?
a) Wear on edges **
b) Wear in the center
c) Uneven patch wear
d) Feathering
Under-inflated tires wear more on the outer edges because the tire’s
contact patch increases at the sides.
8. What is the purpose of an oxygen sensor in a vehicle?
a) Measure engine oil level
b) Detect air-fuel ratio **
c) Regulate coolant temperature
d) Control brake pressure
Oxygen sensors monitor the exhaust gases to ensure the engine
maintains an optimal air-fuel ratio.
9. Which type of coolant is commonly used in modern vehicles?
a) Ethylene glycol **
b) Water only
c) Mineral oil
d) Diesel fuel
Ethylene glycol-based coolants prevent freezing and corrosion in cooling
systems.
10. What does ABS stand for in vehicle braking systems?
a) Automatic Brake Sensor
b) Anti-lock Braking System **
c) Advanced Brake Safety
d) Auxiliary Brake Support
