Understanding Internal Combustion Engines

Which of the following is a type of internal combustion engine?

• Steam engine

• Diesel engine

• Electric motor

• Wind turbine

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DOK Level 1: Recall

What is the primary function of the spark plug in a gasoline engine?

• To cool the engine

• To ignite the air-fuel mixture

• To lubricate engine parts

• To filter the fuel

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DOK Level 1: Recall

Identify the part of the exhaust system that removes hot gases from the cylinder.

• Muffler

• Catalytic converter

• Exhaust manifold

• Tailpipe

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DOK Level 1: Recall

Explain the role of the piston in an internal combustion engine.

• It compresses the air-fuel mixture

• It transfers power to the to the valves

• It ignites the fuel

• It filters the oil

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DOK Level 2: Skill/Concept

Which component is responsible for mixing air and fuel in a carbureted engine?

• Fuel injector

• Carburetor

• Turbocharger

• Radiator

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DOK Level 1: Recall

Describe the process of fuel combustion in a gasoline engine.

• Fuel and air mix is ignited by a spark plug

• Fuel is compressed and ignites due to high temperature

• Fuel is mixed with air in a carburetor

• Fuel is cooled before ignition

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DOK Level 2: Skill/Concept

What is the function of the crankshaft in an internal combustion engine?

• To open and close the valves

• To convert linear motion to rotational motion

• To ignite the air-fuel mixture

• To cool the engine

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DOK Level 1: Recall

Identify the part of the engine that houses the pistons.

• Engine (cylinder) block

• Crankcase

• Camshaft

• Oil pan

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DOK Level 1: Recall

Explain how a turbocharger increases engine efficiency.

• By cooling the engine

• By increasing the amount of air going to the engine.

• By reducing fuel consumption

• By decreasing exhaust emissions

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DOK Level 2: Skill/Concept

Which part of the exhaust system is primarily responsible for noise reduction?

• Catalytic converter

• Muffler

• Exhaust manifold

• Oxygen sensor

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DOK Level 1: Recall