Engine Components and Functions Quiz

What is the primary function of the intake stroke in a naturally aspirated engine?

• To ignite the air-fuel mixture

• To expel exhaust gases

• To draw air into the cylinder

• To compress the air-fuel mixture

Which component ignites the air-fuel mixture during the power stroke?

• Piston

• Crankshaft

• Spark plug

• Exhaust valve

How does a turbocharger increase engine efficiency?

• By using a belt connected to the crankshaft

• By utilizing exhaust gases to power a compressor

• By directly injecting fuel into the combustion chamber

• By reducing the engine's weight

What is a key advantage of superchargers over turbochargers?

• They are more fuel-efficient

• They provide immediate power boost

• They are lighter in weight

• They use less air pressure

What is the typical compression ratio range for naturally aspirated petrol engines?

• 8:1 to 12:1

• 10:1 to 14:1

• 16:1 to 18:1

• 6:1 to 8:1

Why is the compression ratio of a forced induction engine typically lower than that of a naturally aspirated engine?

• To increase fuel efficiency

• To manage increased pressure and temperature

• To reduce engine size

• To improve exhaust emissions

How do forced induction engines prevent engine knock?

• By using higher compression ratios

• By compressing air before it enters the combustion chamber

• By reducing fuel intake

• By increasing engine size

What is one benefit of lowering the compression ratio in forced induction engines?

• It increases the risk of overheating

• It allows the engine to handle additional boost pressure safely

• It reduces engine power

• It decreases engine reliability

How do lower compression ratios help in thermal management of forced induction engines?

• By increasing the thermal load

• By reducing the risk of overheating

• By increasing fuel consumption

• By decreasing engine efficiency

What role does the exhaust valve play in an internal combustion engine?

• It releases exhaust gases from the cylinder

• It ignites the air-fuel mixture

• It draws air into the cylinder

• It compresses the air-fuel mixture