更多"（） is the production of pure water "的相关试题:
[单项选择]We use （） to distill fresh water from sea water.
A. engine
B. sea water pump
C. cylinder cooler
D. fresh water generator
[单项选择]After stopping oily water separator, sea water should be permitted for （） minutes,（）should be closed after stopping pump to reduce oxidation corrosion of inner wall.
A. 15；inlet value
B. 15；inlet and outlet value
C. 30；inlet value
D. 30；inlet and outlet value
[单项选择]In the production of freshwater from seawater through a process of heating and cooling, the cooling phase of production is usually called （）.
A. evaporation
B. distillation
C. dehydration
D. condensation
[单项选择]When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to decrease scale formation
B. for better cooling effect
C. for more economical purpose
D. to raise vacuum
[单项选择]I suppose that when I come back from sea in one year’s time all these old houses（）down.
A. will have been pulled
B. will be pulling
C. will have pulled
D. will be pulled
[单项选择]Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a （）.
A. red triangle with the letter R
B. white triangle with the letters RG
C. green square with the letter G
D. white square with the letters GR
[单项选择]When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.
A. slightly acidic
B. slightly alkaline
C. no salty
D. slightly bitter
[单项选择]The movement of water away from the shore or downstream is called a(n)（）.
A. reversing current
B. ebb current
C. flood current
D. slack current
[单项选择]Water fog from an all-purpose nozzle may be used to（）.
A. fight an electrical fire
B. fight a magnesium fire
C. eliminate smoke from a compartment
D. All of the above
[单项选择]The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.
A. filter
B. hole
C. pollution
D. content
[单项选择]Sea water temporarily pumped into tanks to simulate the increased vertical loading of environmental forces is termed（）.
A. preload
B. liquid variable load
C. fixed load
D. basic load
[单项选择]Some sea water came into the wheel house during the voyage due to（）the window thereof.
A. not close
B. not closing
C. we didn't close
D. not to be closed
[单项选择]Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.
A. bacteria
B. moulds
C. yeasts
D. seals
[单项选择]Sea water is not used directly as a coolant because of （）.
A. low specific heat
B. high specific heat
C. corrosive action
D. high viscosity
[单项选择]Distilled water from an evaporator may be discharged into a potable water tank （）.
A. through a detachable hose connection
B. after passing through an activated charcoal filter
C. after chemical analysis shows it is fit for consumption
D. through a solenoid operated three-way valve
[单项选择]Releasing oil from the sea anchor of a lifeboat may（）.
A. keep the propeller from being fouled
B. increase propeller speed
C. help calm the waves in the vicinity of the craft
D. increase the holding power of the sea anchor
[单项选择]Releasing oil from the sea anchor of a survival craft may（）.
A. keep the propeller from being fouled
B. increase propeller speed
C. help calm the waves in the vicinity of the craft
D. increase the holding power of the sea anchor
