单选题The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is ().Aevaporation is accomplished in a vacuumBdue to the higher temperature of the incoming feedCdue to the latent heat of evaporation principleDevaporation in a submerged medium produces more distillate
单选题
The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is ().
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
参考解析
解析:
暂无解析
相关考题:
The low salary is her_____reason for leaving the job.AprincipalBprincipleCpunctualDprofessional
________ causes strong winds and rough sea at northwest Bay of Biscay.A.Strong low pressureB.Strong high pressureC.Steep pressure gradientD.Steep gradient pressure
The diurnal variation of pressure is most noticeable ______.A.above the polar circlesB.in a low pressure areaC.during periods of low temperaturesD.in the doldrums
The daily recurring pattern of pressure changes most noticeable in low latitudes is the ______.A.daily lapse readingB.diurnal variation of pressureC.pressure tendencyD.synoptic pressure
What alarm is NOT found on an inert gas system ________.A.Low oxygen alarmB.Low pressure alarmC.Scrubber high water level alarmD.Deck seal low water alarm
A barometer showing falling pressure indicates the approach of a ______.A.high pressure systemB.low pressure systemC.high dew pointD.low dew point
Which of the following printing technologies uses piezoelectric pressure pads to produce smallbubbles that are moved to the paper?()A、ImpactB、ThermalC、LaserD、Inkjet
单选题Late fuel injection timing is indicated by ()Alower than normal cylinder pressure and low exhaust temperatureBlower than normal cylinder pressure and high exhaust temperatureChigher than normal cylinder pressure and low exhaust temperatureDhigher than normal cylinder pressure and high exhaust temperature
单选题In a compression refrigeration plant the refrigerant is under low pressure in the () and under high pressure in the ().Acompressor;condenserBcondenser;evaporatorCthrottle valve;evaporatorDevaporator;condenser
单选题Two well-developed high pressure areas may be separated by a().AHill of low pressureBTrough of low pressureCValley of low pressureDRidge of low pressure
单选题()causing strong winds and rough sea north west Bay of Biscay.AStrong low pressureBStrong high pressureCSteep pressure gradientDSteep gradient pressure
单选题Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means ().Acast iron has weaknessBcast iron can stand up shock loadingCcast iron fittings are only suitable in low pressure situationDeast iron fittings are not suitable in low pressure situation
单选题A decrease in barometric pressure is associated with all of the following except().Arising warm airBproximity to a low pressure areaCinward spiraling circulationDclear dry weather
单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?()ALow compression pressure and high exhaust temperatureBLow firing pressure and high exhaust temperatureCLow compression pressure and low exhaust temperatureDLow firing pressure and low exhaust temperature
单选题The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switch, One reason for this could be the ().Asystem is low on refrigerantBhigh pressure cutout switch is improperly adjustedCdischarge valves are leaking slightlyDdischarge valves are leaking excessively
单选题Which of the following statements is true concerning any evaporator?()AHigh conductivity of the distillate indicates distillate salinity is excessiveBIncreasing the absolute pressure of the shell will increase the distillers capacityCMesh separators are used in evaporators to filter the distillateDReducing the brine density will reduce the heat lost overboard
单选题Which instrument is used to predict the approach of a low pressure system().AAnemometerBFathometerCBarometerDThermometer
单选题Leaky exhaust valve will result in which of the following?() (1) high exhaust temperature; (2) low compression pressure; (3) low firing pressure.A(1) and (2)B(1) onlyC(2) onlyD(1),(2) and (3)
单选题A generally circular low pressure area is called a(n)().AcycloneBanticycloneCcold frontDoccluded front
单选题The direction of the surface wind is().Adirectly from high pressure toward low pressureBdirectly from low pressure toward high pressureCfrom high pressure toward low pressure deflected by the earth's rotationDfrom low pressure toward high pressure deflected by the earth's rotation
单选题Low pressure air is usually taken through () or pressure regulators to a low pressure reservoir supplying a ring main through driers.Aglobe valvesBbutterfly valvesCgate valvesDreducing valves
单选题In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?()Aits pressure and temperature are both loweredBits pressure and temperature are both raisedCits pressure is lowered and its temperature is raisedDits pressure is raised and its temperature is lowered
单选题The diurnal variation of pressure is most noticeable().Aabove the polar circlesBin a low pressure areaCduring periods of low temperaturesDin the doldrums
单选题The purpose of the refrigeration system low pressure cutout switch is to ()Aprotect the compressor from liquid flood backBprotect the compressor from low discharge pressureCstart and stop the compressor upon system demandDstart the compressor after a drop in the evaporator pressure
单选题If a compressor runs continuously, the cause might be a()Adefective thermal bulbBclogged scale trapCstuck high-pressure switchDstuck low-pressure switch
单选题An indication of a diesel engine air intake being partially clogged, is ().Alow firing pressure and low exhaust temperaturesBlow firing pressure and normal exhaust temperaturesChigh firing pressure and low exhaust temperaturesDhigh firing pressure and high exhaust temperatures
单选题The circulation around a low pressure center in the Northern Hemisphere is().AcounterclockwiseBvariableCclockwiseDanticyclonic