SS2 Second Term Auto Mechanic Past Questions and Answers (Objective and Theory)

 

Section A: Multiple Choice (Second Term)

Question: What is the purpose of the OBD-II (On-Board Diagnostics) system in modern vehicles?

 

A) Measures tire pressure

B) Monitors engine performance

C) Adjusts brake pressure

D) Controls steering

Answer: B) Monitors engine performance

 

Question: In a vehicle’s electrical system, what does the alternator produce?

 

A) Fuel

B) Electricity

C) Air

D) Engine oil

Answer: B) Electricity

 

Question: Which type of brake system uses a rotating disc and caliper to create friction for stopping?

 

A) Drum brakes

B) Hydraulic brakes

C) Disc brakes

D) Mechanical brakes

Answer: C) Disc brakes

 

Question: What is the purpose of the EGR (Exhaust Gas Recirculation) system in an automobile?

 

A) Improves fuel efficiency

B) Regulates tire pressure

C) Reduces exhaust emissions

D) Enhances suspension

Answer: C) Reduces exhaust emissions

 

Question: What is the role of the transmission fluid in an automatic transmission system?

 

A) Cools the engine

B) Changes gears

C) Adjusts tire pressure

D) Regulates air intake

Answer: B) Changes gears

 

Question: In a car’s suspension system, what does the term “sway bar” do?

 

A) Absorbs shocks

B) Controls tire pressure

C) Stabilizes the vehicle during cornering

D) Regulates engine temperature

Answer: C) Stabilizes the vehicle during cornering

 

Question: What does the term “turbocharger” do in an engine?

 

A) Increases fuel efficiency

B) Boosts engine power

C) Reduces exhaust emissions

D) Controls steering

Answer: B) Boosts engine power

 

Question: Which type of fuel injection system sprays fuel directly into the combustion chamber?

 

A) Carburetor

B) Sequential fuel injection

C) Port fuel injection

D) Direct fuel injection

Answer: D) Direct fuel injection

 

Question: What does the acronym CVT stand for in relation to transmissions?

 

A) Constant Velocity Transmission

B) Continuously Variable Transmission

C) Controlled Vibration Technology

D) Central Valve Timing

Answer: B) Continuously Variable Transmission

 

Question: What is the purpose of the PCV (Positive Crankcase Ventilation) valve in an engine?

 

A) Ignites the fuel-air mixture

B) Regulates exhaust emissions

C) Controls tire pressure

D) Prevents the buildup of pressure in the crankcase

Answer: D) Prevents the buildup of pressure in the crankcase

 

Section B: Theory (Second Term)

Question: Explain the significance of the ECU (Engine Control Unit) in modern vehicles and its role in engine performance.

 

Question: Discuss the working principles of a continuously variable transmission (CVT) and its advantages compared to traditional automatic transmissions.

 

Question: Describe the function of the PCV (Positive Crankcase Ventilation) system in an internal combustion engine and its impact on emissions.

 

Question: Explain the importance of regular maintenance of a car’s suspension system and how it contributes to overall vehicle safety and performance.

 

Question: Discuss the role of the turbocharger in enhancing engine performance, including its advantages and potential challenges.