What component of an internal combustion engine moves up and down or backward and forward inside a cylinder?
A. Pistons
B. Spark plugs
C. Camshaft
D. Crankshaft
A. Correct. Pistons are components that move up and down or backward and forward inside a cylinder.
B. Incorrect. Spark plugs supply the spark that ignites the air/fuel mixture.
C. Incorrect. The camshaft is a driven shaft fitted with rotating wheels of irregular shape (cams) that open and close the valves in an engine.
D. Incorrect. The crankshaft converts the piston’s up-and-down or forward-and-backward motion into rotational motion.
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