The part that is MOST-Likely to be a good indication of what is taking place in a cylinder is the:
A)piston ring
B)head gasket
C)spark plug
D)valve

Question

Quizplus · Accepted Answer

The spark plug's condition can give a good indication of what is happening inside a cylinder, such as whether the fuel mixture is burning properly. It can show signs of wear, fouling, or deposits that reflect combustion conditions.

The Part That Is MOST-Likely to Be a Good Indication