Lessonl9
1735. is the production of pure water from a water by evaporation and
re-condensing.
A.Evaporation
C. Condensation
孙思邈名言
B.Circulation
李世民老婆D. Distillation儿童画美人鱼
1736.When a vacuum boiling evaporator works, the hot jacket water will pass over
the tube stack and the a water passing through the tubes.
A.dispo B. dissolve C. heat D. dissipates
1737.With a vacuum boiling evaporator, the remainder of a water fed to the
evaporator is pumped out by .
A・ a brine pump B. an air ejector C・银行风险 a feed pump D. distillate pump
1738.In a vacuum boiling evaporator, the fresh water generated is pumped out
by •
A.a brine pump B・ an air ejector 关于白鹭的资料C. a feed water pump D. a
youmocondensate pump
1739.When distilling a water the cooling water discharging from the distiller is
fed back to evaporator as feed water .
A.to decrea scale formation B. for better cooling effect
C.for more economical purpo D. to rai vacuum
1740.When distilling salt water the cooling water discharging from the distiller is
fed back to evaporator as feed water .
A.to cut down the amount of cooling water needed
B.to prevent an excess amount of cooling water from being discharged to the bilges
C.to supply hot water to the evaporator for more economical operation
D.None of the above is tree.
1741.The process during which liquid containing a reasonable amount of nsible
heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called •
A.boiling off B. flash evaporation C. condensation D. none of the above
1742.In the process of , liquid changes into gas.
A.evaporation B. frosting C. condensing D. compressing
1743.Which of the following is NOT on the list items to be recorded in Oil Record
Book Part I (machinery space operation)?
A.Accidental discharge of oil. B. Disposal of oil residues.
C. Quantity of water produced by F. W. G.
D・美人体艺术 Discharge of dirty ballast or cleaning water from fuel oil tanks.
1744.When the water produced from most evaporator is supplied for drinking
purpo, it must be treated to ensure it is biologically pure and .
A・ slightly acidic B. slightly alkaline C. no salty D. slightly bitter
1745. provides the head or pressure to supply the domestic water where
required.
A.The compresd air B. The compressing air
C. The transfer pump D. The head tank
1746. is ud for washing and drinking.
A.The ballast system B. The salt water system
C・ The bilge system D. The domestic system
1747.Water evaporates or steam condens at the saturation temperature, which
depends upon the pressure, the higher the pressure the saturation temperature.
A・ the more B. the higher
C. the lower D. the highest
1748.We u to distill fresh water from a wate匚
A.engine B. a water pump
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C. cylinder cooler D. fresh water generator
1749.Becau of the reduced in the vacuum boiling evaporator, some of the
