When measuring spark plug gap, feeler gauges should not be used because the surfaces of the spark plug electrodes are not perfectly _____, so it is preferable to use wire feeler gauges.
A) Parallel
B) Perpendicular
C) Flat
D) Curved

Question

Quizplus · Accepted Answer

The surfaces of the spark plug electrodes are not perfectly parallel, so it is preferable to use wire feeler gauges, which can conform to the shape of the electrodes.

When Measuring Spark Plug Gap, Feeler Gauges Should Not Be