单选题The heated feed-water entering any flash chamber of a flash-type evaporator will（）Avaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamberBvaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamberCvaporize, with the remaining water a t a temperature greater than it entered the flash chamberDboil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
单选题
The heated feed-water entering any flash chamber of a flash-type evaporator will（）
A
vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
B
vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
C
vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
D
boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
参考解析
解析：
暂无解析
相关考题：
What specific jobs do securities outside dressing rooms do?A.In addition to ensuring the life style of the performers, they should prevent any person from entry.B.In addition to ensuring the life safety of the actors, they should stop any reporters from enteringC.In addition to ensuring the life safety of the performers, they should prevent any fans from enteringD.In addition to ensuring the life safety of the performers, they should prevent any unauthorized person from entering
For the fuel oil purifier higher throughput and more efficient process can be achieved if the fuel is0 A.viscosity a heated to reduce itsB.cooled to reduce its temperatureC.heated to reduce its densityD.heated to reduce its gravity
Which statement is NOT true?A.While displacement pump works, volume of the working chamber will increase and decrease alternatelyB.A gear pump always has two gearsC.Any vane pump will have a rotor within a ringD.A balanced vane pump has two outlet ports and they are positioned symmetrically
The process during which liquid containing a reasonable amount of sensible heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called _____.A.boiling offB.flash evaporationC.condensationD.none of the above
In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.A.saltwater heater shellB.second-stage condenserC.atmosphereD.second-stage flash chamber
The master of any vessel entering Singapore may ______ radio pratique to the Port Health Officer through his local agent．A.apply toB.apply forC.apply withD.apply in
The lowest temperature required to cause self-sustained combustion of a substance independent of any outside source of ignition is called ______．A.Explosive rangeB.Flash pointC.Ignition temperatureD.Combustion temperature
You just purchased a refurbished router that contains a configuration from a previous deployment. What should you do, before entering a new configuration into the router?（）A、RAM should be erased and the router restarted.B、Flash should be erased and the router restarted.C、NVRAM should be erased and the router restarted.D、The new configuration should be entered and saved.
单选题One advantage of a flash distilling plant when compared to a submerged tube distiller is（）Agreater distillate purity through high temperature evaporationBcold shocking for scale removal is not requiredCless internal corrosion because of lower brine densityDless feed-water is required for equal plant capacity
单选题The primary function of a fuel delivery check valve assembly is to（）Adeliver proper fuel quantity to the injection nozzleBprovide rapid fuel injection cutoffCcontrol fuel quantity entering the pump bodyDcontrol fuel pressure delivered to the combustion chamber
单选题The flash-evaporator is different with the submerged-tube evaporator in that for the former（）AWater is heated into vapor on heating surfacesBWater is vaporized by pressure differenceCThere are no heating-transfer surfacesDThere are more heating-transfer surfaces
单选题A flash-type evaporator discharges heated seawater into a chamber that is maintained at a pressure than the vapor pressure of the entering heated seawater, and subsequently the flashed water vapor thereby produced（）Alower condensingBhigher coolingClower coolingDhigher condensing
单选题In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the（）.Asaltwater heater shellBsecond-stage condenserCatmosphereDsecond-stage flash chamber
单选题What is the operating principal of a flash type evaporator?（）ASea water is heated to boiling temperature under a vacuumBSea water is passed over heated plates in a thin filmCHeated sea water is injected into a vacuum chamberDSea water is forced through a heated eductor
单选题The heated feedwater entering any flash chamber of a flash-type evaporator will（）Avaporize, with the unflashed water remaining at the temperature at which it entered the flash chamberBvaporize, with the unflashed water equalizing to the saturation conditions existing in the flash chamberCvaporize, with the remaining water at the temperature greater than it entered the flash chamberDboil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
单选题The advantages of flash type evaporators, as compared to submerged tube type evaporators, include （）.Aless internal corrosion because of lower brine densityBhigher temperature evaporation for lower salinity of the distillate producedCless scale formation in a flash evaporatorDless feed-water required for a flash evaporator
单选题On a multistage flash-type evaporator, the flash chamber is （）Acombined as part of the salt water feed heaterBthe open area above the brine levels in the first and second stagesCcombined as part of the distillate coolerDanother term used to describe the vapor feed heater
单选题The master of any vessel entering Singapore may （） radio pratique to the Port Health Officer through his local agent.Aapply toBapply forCapply withDapply in
单选题The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）Ahigher than the first stage feed-water temperature and absolute shell pressureBlower than the first stage feed-water temperature and absolute shell pressureCthe same as the first stage feed-water temperature and absolute shell pressureDnot related to the feed-water temperature and absolute shell pressure
单选题Which of the following descriptions best identifies the operating principal of a flash-type evaporator?（）ASea water is heated to boiling temperature while under a vacuumBSea water is passed over heated plates in a thin filmCHeated sea water is injected into a vacuum chamberDSea water is forced through a heated eductor
单选题Early models of the flash-type evaporators used a separate shell-and-tube heat exchanger as the air ejector condenser.More recent models use a combined air ejector condenser with the（）Adistilling condenserBsalt water feed heaterCdistillate coolerDflash chamber
单选题On which of the following heated surfaces of a flash type evaporator would you be more likely to find soft scale formation?（）AFeed-water heater internal tube surfacesBInternal distillate cooler tubesCFlash chamber vertical surfacesDDistilling condenser tubes
单选题The three basic parts of any eductor are the nozzle, the suction chamber, and the （）.AinjectorBcompressorCdiffuserDsiphon
单选题The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated （）Afor atomizingBfor centrifugingCin a storage tankDin the re-circulating line
单选题The principal purpose of sub-cooling liquid refrigerant prior to its entering the expansion valve is to （）.Aincrease the refrigerating effect, by decreasing the amount of flash gasBallow the refrigerant to enter the throttling device in a saturated conditionCincrease the refrigerating effect by increasing the amount of flash gasDminimize the temperature drop of the liquid as it passes through the solenoid valve to the outlet side
单选题By saying that the bomb also has a deterrent effect the spokesman means that it _____.Acan kill those entering others’ houses by forceBwill threaten the safety of the owners as wellCwill frighten away any possible intrudersDcan show the special status of its owners