輪機(jī)英語船舶動力裝置章節(jié)練習(xí)(2018.03.29)

A.metal particles loosened by wear
B.air when no air cleaners are used
C.condensation of water vapors
D.breakdown of the lubricating oil by dilution

A.slightly acidic condition
B.slightly alkaline condition
C.overtreatment of water
D.neutral condition of water

A.viscosity
B.density
C.velocity
D.electricity

A.lower than；can lubricate
B.lower than；can cool
C.higher than；can enter
D.higher than ；cannot enter

A.as much fuel as
B.less fuel than
C.less fuel as
D.more fuel than

A.the pulse-phase system
B.the pulse Doppler system
C.the pulse system
D.the pulse interval

A.the starting air distributor
B.the cut-off valve on the air main
C.the main starting valve
D.the air bottle control valve

A.Increased suction head pressure
B.Decreased feedwater temperature
C.Pump recirculating line being open too much
D.Excessive feedwater temperature

A.an isochronous governor
B.elastic engine mounts
C.a vibration damper
D.a cast iron bed plate with good flexible qualities

A.being shrunk into
B.to be shrunk into
C.to be shrunk with
D.shrinking into