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Basic engine hardware: number of valves in a typical diesel engine cylinder For a conventional four-stroke diesel engine cylinder, how many valves are commonly provided? Choose the correct option.

Difficulty: Easy

One valve
Two valves
Three valves
Four valves

Correct Answer: Two valves

Explanation:

Concept
A conventional four-stroke cylinder (diesel or petrol) typically has two valves: one intake and one exhaust. Although many modern designs use 3 or 4 valves per cylinder to improve breathing, the basic textbook configuration is two.

Common pitfall
Confusing modern multi-valve performance designs with the standard instructional baseline.

Final Answer
Two valves

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