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

• To filter the air entering the engine.
• To cool the engine components.
• To ignite the air-fuel mixture in the engine.
• To lubricate the engine parts.

Why is regular maintenance of spark plugs important?

• Spark plugs are only important for starting the engine.
• Regular maintenance of spark plugs is only necessary for diesel engines.
• Regular maintenance of spark plugs is important for optimal engine performance and efficiency.
• Spark plugs do not require any maintenance.

What does the term "spark plug gap" refer to?

• The size of the spark plug itself.
• The type of fuel used in an engine.
• The temperature at which a spark plug ignites fuel.
• The distance between the electrodes of a spark plug.

What can happen if the spark plug gap is not set correctly?

• Improper spark plug gap can improve fuel efficiency.
• Setting the spark plug gap incorrectly enhances acceleration.
• A correct spark plug gap leads to engine overheating.
• Incorrect spark plug gap can cause engine misfires and poor performance.

Which tool is essential for checking the spark plug gap?

• Wrench
• Screwdriver
• Pliers
• Gap tool or feeler gauge

What is the effect of a fouled spark plug on engine performance?

• A fouled spark plug negatively affects engine performance by causing misfires and reducing power.
• A fouled spark plug enhances fuel efficiency and reduces emissions.
• A fouled spark plug has no effect on engine performance.
• A fouled spark plug improves engine performance by increasing power.

Why is it important to use the correct type of spark plug for your vehicle?

• The color of the spark plug is the most important factor.
• It is important to use the correct type of spark plug to ensure optimal engine performance and prevent damage.
• Spark plugs have no impact on engine performance.
• Using any spark plug will work fine.

What tools do you need to service spark plugs?

• Pry bar, chisel, file, sledgehammer
• Drill, saw, measuring tape, level
• Screwdriver, pliers, hammer, wrench
• Spark plug socket, ratchet wrench, torque wrench, gap gauge

What might be the result of over-tightening a spark plug?

• Improved combustion sealing and engine performance.

• Longer lifespan of the spark plug.
• Increased fuel efficiency.
• Damage to the spark plug or engine components.

What can you use to clean spark plug electrodes?

• Compressed air
• Dish soap and water
• 220 grit sandpaper

• Engine oil