A、strength
B、dense
C、percentage
D、velocity
更多“When to remove scale from the cooling spaces, acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.”相关的问题
A、Heavy rust is removed with a chipping hammer. B、Loose paint and scale is removed with a scraper. C、Heavy rust is removed with a scraper. D、Loose paint and scale are removed with a chipping hammer.
A、Loose paint and scale is removed with a scraper. B、Heavy rust is removed with a scraper. C、Loose paint and scale is removed with a chipping hammer. D、Heavy rust is removed with a chipping hammer.
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
A、filter to remove the fuel oil B、use the settler to remove the fuel oil C、remove the fuel oil by centrifuging D、drain and then renew the lube oil supply
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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