Understanding Spark Plug Fundamentals

What is the primary material used in standard spark plugs?

• Copper

• Platinum

• Iridium

• Silver

Which material is known for providing the longest lifespan in spark plugs?

• Copper

• Nickel

• Iridium

• Aluminum

What is the main advantage of platinum spark plugs over copper spark plugs?

• Better conductivity

• Longer lifespan

• Lower cost

• Higher heat resistance

What does the heat range of a spark plug indicate?

• The temperature at which the spark plug operates

• The size of the spark plug gap

• The material of the spark plug

• The voltage required to create a spark

Which of the following is a characteristic of a "hot" spark plug?

• It dissipates heat quickly

• It retains heat longer

• It has a larger gap

• It is made of iridium

What is the typical spark plug gap range for most vehicles?

• 0.020 to 0.030 inches

• 0.040 to 0.060 inches

• 0.070 to 0.080 inches

• 0.090 to 0.100 inches

How does a smaller spark plug gap affect engine performance?

• Increases fuel efficiency

• Decreases ignition voltage requirement

• Increases power output

• Decreases engine temperature

Which type of spark plug is best suited for high-performance engines?

• Copper

• Platinum

• Iridium

• Nickel

What happens if the spark plug gap is too wide?

• The engine may misfire

• The spark plug will overheat

• The engine will run too rich

• The spark plug will wear out faster

Which of the following is NOT a factor in determining the correct spark plug heat range?

• Engine type

• Driving conditions

• Fuel type

• Spark plug material