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【单项选择题】

Less scale formation occurs in a flash evaporator than in a submerged tube evaporator because ().

A、A.the distillate produced has greater purity

B、B.no boiling occurs on heat transfer surfaces

C、C.evaporation occurs at a higher rate

D、D.the incoming feed is at a higher temperature

更多“Less scale formation occurs in a flash evaporator than in a submerged tube evaporator because ().”相关的问题
第1题

A、A.less internal corrosion because of lower brine density  B、B.higher temperature evaporation for lower salinity of the distillate produced  C、C.less scale formation in a flash evaporator  D、D.less feed-water required for a flash evaporator  

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第3题

A、evaporation is accomplished in a vacuum  B、due to the higher temperature of the incoming feed  C、due to the latent heat of evaporation principle  D、evaporation in a submerged medium produces more distillate  

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第4题

A、greater distillate purity through high temperature evaporation  B、cold shocking for scale removal is not required  C、less internal corrosion because of lower brine density  D、less feed-water is required for equal plant capacity  

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第6题

A、high temperature distillate can be re- circulated to induce additional flashing  B、scale formation is not a severe problem  C、cold shocking is more effective in removing scale  D、water purity is greatly increased at high capacity  

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第7题

A、A.poor distillate quality  B、B.reduced evaporator capacity  C、C.low brine concentration  D、D.improper vacuum regulation  

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第8题

A、smaller scales  B、larger scales  C、smaller scales and larger scales  D、moderate scales  

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第9题

A、smaller scales  B、larger scales  C、smaller scales and larger scales  D、moderate scales  

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