Which of the following statements is true concerning the overall efficiency of air compressors?()

A . High pressure compressors are more efficient than low pressure compressors B . Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit C . Two stage compressors are generally more efficient than single stage compressors D . The volumetric efficiency is decreased in multistage compressor

时间:2022-11-09 20:50:13 所属题库:船舶辅助机械题库

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