Engineering · Diesel — Indicator Card
An engine indicator card (PV diagram) is used to determine:
- AFuel sulfur content
- BCrankshaft alignment
- CCooling water salinity
- DIndicated horsepower and the combustion pressure characteristics of a cylinder✓ Correct
Explanation
The indicator card plots cylinder pressure against volume (or crank angle). Its enclosed area gives the indicated mean effective pressure, from which indicated horsepower is calculated, and its shape reveals injection timing, compression, and combustion faults.
Authority: Modern Marine Engineer's Manual; engine performance analysis
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