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单项选择题
A.changed accordingly
B.unchanged
C.positioned ahead
D.positioned astern
单项选择题
A.tank level
B.Various filters
C.Drains
D.seawater temperature
单项选择题
A.hot air
B.hot boiler water
C.cylinder water
D.hot seawater
单项选择题
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
单项选择题
A.inevitable
B.harmful
C.helpful
D.unacceptable
单项选择题
A.increase in temperature
B.lose its energy partly
C.expand and do work
D.begin to be compressed
单项选择题
A.a modern diesel engine;a turbine wheel
B.a modem diesel engine;exhaust gases
C.a compressor;an exhaust gas turbocharger
D.a compressor;a turbine wheel
单项选择题
A.the supply of normal air and removal of compressed air
B.the supply of fuel oil and combustion of the atomized oil
C.the supply of fresh air and removal of exhaust gases
D.the supply of fresh air and removal of the extra heat
单项选择题
A.the use of a poor quality oil
B.the deterioration of its properties
C.the formation of deposits
D.the reduction in heat transfer ability
单项选择题
A.lubricating
B.cooling
C.cleaning
D.neutralizing