The propeller is pushed on to the tubeshaft taper and made tight by（）

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

A.high speeds
B.medium speed
C.low speeds
D.the same speed with the engine

A.check oil level in bearing sump
B.check them for leakagec through end seals
C.pump bilges in time
D.check temperature