Two technicians are discussing engine operation. Technician A says that valve timing is critical to smooth engine operation. Technician B says that ignition timing is critical to smooth engine operation. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Both valve timing and ignition timing are critical to smooth engine operation. Valve timing determines the flow of air and fuel into and out of the engine, while ignition timing determines when the spark plug fires and ignites the air/fuel mixture. Both need to be finely tuned for optimal engine performance.

Two Technicians Are Discussing Engine Operation