Engineering · Diesel — Operating Cycle
Compared with a four-stroke engine of the same speed and cylinder size, a two-stroke-cycle diesel produces a power stroke:
- AOnce every four revolutions
- BOnce every two revolutions
- CEvery revolution✓ Correct
- DOnly during scavenging
Explanation
A two-stroke engine completes its cycle in one revolution, so it fires every revolution — twice as often as a four-stroke for the same speed.
Authority: Diesel Engines (USCG engineering topic)
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