单项选择题
The propeller is pushed on to the tubeshaft taper and made tight by（）
A.a mechanical seal
B.keyway and key
C.a nut
D.shrinkage
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相关考题
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单项选择题
For a propeller direct driven by the engine,（）.
A.the thrust pads are while metal faced on both sides
B.the thrust pads are while metal faced only on the forward side
C.the thrust pads are while metal faced only on the after side
D.intermediate shaft usually supported by a plummer block -
单项选择题
Propeller running at （） are generally efficient.
A.high speeds
B.medium speed
C.low speeds
D.the same speed with the engine -
单项选择题
Which is not the maintenance work for shaft bearings in transmission system?（）
A.check oil level in bearing sump
B.check them for leakagec through end seals
C.pump bilges in time
D.check temperature
