A.coke deposits
B.cylinder water temperature
C.asphalt in fuel oil
D.lub oil
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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
A.inevitable
B.harmful
C.helpful
D.unacceptable
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