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单项选择题

When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for work
A.remains the same
B.is reduced
C.is increased
D.is eliminated

A.remains
B.is
C.is
D.is
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单项选择题
A thrust bearing is used with a propulsion diesel engine to ____.
A.control axial movement of the crankshaft
B.transmit engine thrust to the propeller shaft
C.absorb vibrations in the propeller shafting
D.prevent propeller thrust from being transmitted to the hull
A.A.control
B.transmit
C.absorb
D.prevent
单项选择题
Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ___.
A.apparent slip
B.true slip
C.pitch
D.propulsive efficiency
A.A.apparent
B.true
C.pitch
D.propulsive
多项选择题
等效加荷图式应满足的条件为（ ）。
A.应该与理论计算简图完全一致
B.等效荷载产生的控制截面上的主要内力应与计算内力相等
C.等效荷载产生的主要内力图形与计算内力图形相似
D.由于等效荷载引起的变形差别,应给予适当调整
E.次要截面上的内力应与设计值接近
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