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The diagram factor is the ratio of the

A. Area of the actual indicator diagram to the area of theoretical indicator diagram

B. Actual workdone per stroke to the theoretical workdone per stroke

C. Actual mean effective pressure to the theoretical mean effective pressure

D. Any one of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  20. Thermal equilibrium means that the flow of steam is
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