A.for FP, once fitted, the position of the blades can also be changed in operation
B.for CP, once fitted, the position of the blades can also be changed in operation
C.the CP type has a relatively smaller hub compared with the FP propellers
D.the FP type has a relatively larger hub compared with the CP propellers

A.shaft
B.boss
C.wheel
D.lever

A.higher
B.lower
C.very higher
D.very lower

A.A special sealing gland
B.Propeller
C.Tailshaft
D.Sterntube bearing

A.tie rod
B.thrust block
C.bedplate of main engine
D.frame of main engine

A.propeller
B.flying wheel
C.main engine
D.crankshaft

A.coke deposits
B.cylinder water temperature
C.asphalt in fuel oil
D.lub oil

A.changed accordingly
B.unchanged
C.positioned ahead
D.positioned astern

A.tank level
B.Various filters
C.Drains
D.seawater temperature

A.hot air
B.hot boiler water
C.cylinder water
D.hot seawater

A.the inlet port is opened by the up coming piston； the port is closed by the down going
B.the inlet valve is opened by the down going piston；the inlet valve is closed
C.the inlet port is opened by the down going piston；the port is closed by the up coming
D.the inlet valve is opened