Spark Plug and Alternator Questions

What is the primary function of a spark plug in a vehicle?

• Regulating fuel intake

• Generating electric current

• Producing a spark to ignite fuel

• Controlling exhaust emissions

Which part of the spark plug generates the spark to ignite the air-fuel mixture in the engine?

• Insulator

• Terminal

• Center electrode

• Ground electrode

What effect can a worn-out spark plug have on a vehicle's performance?

• Improved fuel efficiency

• Increased engine power

• Rough idling or misfiring

• Enhanced acceleration

What material is commonly used for the central electrode of a spark plug?

• Copper

• Platinum

• Silver

• Aluminum

How often should spark plugs typically be replaced in a standard gasoline engine?

(Two answers are allowed for this question.)

• Every 10,000 miles

• Every 30,000 miles

• Every 50,000 miles

• Every 100,000 miles

What could cause a spark plug to foul?

• Excessive fuel additives

• Proper air-to-fuel ratio

• Regular maintenance

• Correct ignition timing

Which of these symptoms might indicate a failing spark plug?

• Smooth engine operation

• Difficulty starting the engine

• Improved gas mileage

• Consistent acceleration

What is the purpose of the gap between the electrodes on a spark plug?

• To enhance fuel economy

• To increase engine noise

• To regulate combustion timing

• To create the spark for ignition

What is the typical lifespan of an iridium-tipped spark plug compared to a copper-tipped spark plug?

• Shorter

• Longer

• Similar

• Depends on the vehicle model

What is the primary function of an alternator in a vehicle?

• Igniting the fuel mixture

• Providing electrical power to the battery and accessories

• Regulating the transmission

• Cooling the engine