Understanding Four Stroke Engines

What are the four strokes in a four-stroke engine cycle?

• Intake, Compression, Power, Exhaust

• Intake, Combustion, Power, Exhaust

• Intake, Compression, Ignition, Exhaust

• Intake, Combustion, Ignition, Exhaust

Which component of a four-stroke engine is responsible for opening and closing the valves?

• Crankshaft

• Camshaft

• Piston

• Spark Plug

During which stroke does the piston move upwards and compress the air-fuel mixture?

• Intake Stroke

• Compression Stroke

• Power Stroke

• Exhaust Stroke

What is the primary advantage of a four-stroke engine over a two-stroke engine?

• Higher power output

• Better fuel efficiency

• Simpler design

• Lower weight

In which stroke is the exhaust valve open?

• Intake Stroke

• Compression Stroke

• Power Stroke

• Exhaust Stroke

What is the function of the spark plug in a four-stroke engine?

• To compress the air-fuel mixture

• To ignite the air-fuel mixture

• To expel exhaust gases

• To lubricate the engine

Which of the following is a common application of four-stroke engines?

• Chainsaws

• Lawn mowers

• Motorcycles

• Jet engines

What is the role of the crankshaft in a four-stroke engine?

• To open and close the valves

• To convert linear motion to rotational motion

• To ignite the air-fuel mixture

• To cool the engine

Which stroke is also known as the power stroke?

• Intake Stroke

• Compression Stroke

• Combustion Stroke

• Exhaust Stroke

What is the typical temperature range inside the combustion chamber during the power stroke?

• 100-200°C

• 200-400°C

• 500-700°C

• 700-900°C