Air enters a diesel engine with a density of 1.0 kg/m3.

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Air enters a diesel engine with a density of 1.0 kg/m³. The compression ratio is 21. At steady state, the air intake is 30 × 10^–3 kg/s and the net work output is 15 kW. The mean effective pressure (kPa) is_____.

1. 625
2. 525
3. 535
4. 520

Correct Option: B

mep =	work output
	swept volume

=	12

		30 × 10^{- 3}		1 -	1
					21

= 525 kPa