Four Cycle Engines Extension

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

• Intake

• Compression

• Power

• Exhaust

• Ignition

What component is responsible for mixing air and fuel in a small four-stroke engine?

• Carburetor

• Piston

• Crankshaft

• Camshaft

• Spark Plug

In a four-stroke engine, how many revolutions of the crankshaft are required to complete one power cycle?

• 1

• 2

• 4

• 8

• 16

Which of the following components is critical for the timing of the engine's intake and exhaust valves?

• Piston

• Crankshaft

• Camshaft

• Flywheel

• Ignition Coil

What is the primary purpose of regular maintenance for small engines?

• Increase fuel consumption

• Extend the lifespan and efficiency

• Decrease power output

• Initiate mechanical failure

• Simplify operation

Match the term to its correct definition:

• Camshaft

• Regulates the air-fuel mixture for combustion

• Spark Plug

• Moves up and down within the cylinder

• Crankshaft

• Converts linear motion to rotational motion

• Carburetor

• Provides the spark needed for combustion

• Piston

• Controls the opening and closing of the valves

A small engine lawn mower is experiencing difficulties starting. After checking the fuel level, you discover that the fuel is old and stale. Describe the steps you would take to address this issue and what maintenance practices could prevent this problem in the future.

You are tasked with servicing a four-stroke generator that has not been used for six months. Outline the maintenance procedures you would perform before starting the engine and explain the importance of each step in ensuring the engine operates safely and efficiently.

In a small engine repair shop, you notice a customer has brought in a two-stroke engine for repair. Compare and contrast the operational differences between the two-stroke and four-stroke engines you have learned about, focusing on efficiency and power delivery.

Discuss how advancements in technology may impact the design and efficiency of small four-stroke engines. What changes would you expect to see in future models?