Small Engine Components and Operations Pretest

What is the primary function of the piston in a four-stroke engine?

• To ignite the fuel-air mixture

• To transfer force from expanding gas to the crankshaft

• To cool the engine

• To lubricate the engine components

Which of the following is NOT a stroke in a four-stroke engine cycle?

• Intake

• Compression

• Exhaust

• Ignition

In a four-stroke engine, during which stroke does the spark plug ignite the fuel-air mixture?

• Intake

• Compression

• Power

• Exhaust

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

• Crankshaft

• Camshaft

• Piston

• Flywheel

How does a four-stroke engine differ from a two-stroke engine in terms of operation?

• A four-stroke engine completes a power cycle in two strokes of the piston.

• A four-stroke engine uses a separate lubrication system.

• A four-stroke engine has a simpler design with fewer moving parts.

• A four-stroke engine requires a fuel-oil mixture for operation.

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

• To convert linear motion of the piston into rotational motion

• To mix the fuel and air

• To cool the engine

• To ignite the fuel-air mixture

Which maintenance procedure is essential for ensuring the longevity of a four-stroke engine?

• Regularly replacing the spark plug

• Mixing oil with fuel

• Cleaning the air filter

• Adjusting the carburetor

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

• To store energy and maintain engine speed

• To cool the engine

• To ignite the fuel-air mixture

• To open and close the valves

Which of the following is a common component found in both two-stroke and four-stroke engines?

• Carburetor

• Camshaft

• Valve

• Oil pump

What is the correct sequence of strokes in a four-stroke engine cycle?

• Intake, Power, Compression, Exhaust

• Compression, Intake, Power, Exhaust

• Intake, Compression, Power, Exhaust

• Power, Exhaust, Intake, Compression