五、某直接作動式蒸汽幫浦（Direct-acting steam pump）的蒸汽側與液體側之活塞直徑分別為 150 mm 與 60 mm，其機械效率為 65%。若此時蒸汽側之淨壓力為 150 kPa

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五、某直接作動式蒸汽幫浦（Direct-acting steam pump）的蒸汽側與液體側之活塞直徑分別為 150 mm 與 60 mm，其機械效率為 65%。若此時蒸汽側之淨壓力為 150 kPa，試求液體側的淨壓力。（15 分）

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