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1 一對五級的相等塔輪,主動軸轉速為240rpm,若從動軸的最低及次低轉速各為60及120rpm,則從動軸其他三個轉速為
A 960,480,240 rpm
B 540,270,180 rpm
C 240,360,480 rpm
D 180,240,300 rpm

n1=60rpm;n2=120rpm;n3=N=240rpm

n2×n4=n32

120×n4 = 2402

n4=480(rpm)

n1×n5 = n32

60×n5 = 2402

n5=960(rpm)