Take This Quiz To Find Out If You’re A Car Engine Expert!

Which is the minimum number of valves per cylinder in a four-stroke engine?

Retry Correct Incorrect A four-stroke engine must have at least two valves per cylinder, and two valves are considered standard. Three or more valves make the engine more efficient and give the engine a “multi-valve” designation.

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Michael Cole/Corbis via Getty Images

Michael Cole/Corbis via Getty Images

Which is the minimum number of valves per cylinder in a four-stroke engine?

• 6
• 4
• 3
• 2