Excessive scale formation in a distill

1、Excessive piston ring wear in a diesel

Excessive piston ring wear in a diesel engine will cause（）Ahigh lube oil viscosityBincreased lube oil consumptionClow lube oil temperaturesDhigh firing pressure

2、In a flash evaporator, scale as a resu

In a flash evaporator, scale as a result of higher than normal temperatures in most likely to occur in the （）Asecond stage feed heaterBsaltwater feed heaterCdistillate coolerDsecond stage vapor separator

3、Excessive alkalinity of the water in a

Excessive alkalinity of the water in an auxiliary boiler can cause （）.Acaustic embrittlement of the boiler metalBacidic corrosion of the boiler metalChard scale deposits on the boiler tubesDetching of the heat exchange surface

4、Waterside scale in a fire-tube boiler

Waterside scale in a fire-tube boiler may cause （）.Aincreased heat transferBfireside erosionChigh steam demandDoverheated tube

5、Excessive oil foaming in the crankcase

Excessive oil foaming in the crankcase of a refrigeration compressor can result in （）.Aoverheated compressor bearingsBexcess lube oil viscosityCcarbon deposits on the compressor piston ringsDwax crystals forming in the lubricant

6、In a flash distilling unit, evaporator

In a flash distilling unit, evaporator feed (seawater) first absorbs heat in the （）.Avapor feed heaterBair ejector condenserCsaltwater heaterDdistillate cooler