When the engine of your car heats up, the spark plug gap will
A) decrease at first and then increase later, so that the two effects cancel once the engine reaches operating temperature.
B) decrease.
C) increase.
D) remain unchanged.

Question

Quizplus · Accepted Answer

The spark plug gap will increase as the engine heats up due to thermal expansion of the metal components of the spark plug.

When the Engine of Your Car Heats Up, the Spark