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1. |
A portable compressor is taken from the place where the barometric pressure is 750 mm Hg and the average intake temperature is 27°C to a mountainous region where the barometric pressure is 560 mm Hg and temperature is 7°C. The reduction in mass output of the machine is: |
A. | 80% |
B. | 60% |
C. | 40% |
D. | 20% |
Answer» E. | |