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
The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）
A
higher than the first stage feed-water temperature and absolute shell pressure
B
lower than the first stage feed-water temperature and absolute shell pressure
C
the same as the first stage feed-water temperature and absolute shell pressure
D
not related to the feed-water temperature and absolute shell pressure
参考解析
解析：
暂无解析
相关考题：
Which of the following statements is NOT mentioned in the passage?A. The climate is associated with man's intelligence.B. People's creative thinking is changing from season to season.C. That temperature affects one's creative thinking has been scientifically proved.D. Autumn is the second best season for thinking.
It will interest you to know that as a special sign of encouragement, we shall consider accepting payment by D／P during this sales－pushing stage.(英译中)
Mysqldump was used to create a single schema backup; Shell mysqldump –u root –p sakila sakila2013.sqlWhich two commands will restore the sakila database without interfering with other running database?（）A.Mysql＞ USE sakila; LOAD DATA INFILE ‘sakila2013.sql‘;B.Shell＞ mysql –u root –p sakila sakila2013.sqlC.Shell＞ mysql import –u root –p sakila sakila2013.sqlD.Shell＞ mysql –u root -p –e ‘use sakila; source sakila2013.sql‘E.Shell＞ mysql –u root –p –silent ＜ sakila2013.sql
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
Which of the listed problems could produce a high absolute pressure within a flash type evaporator?A.production of high salinity distillateB.seawater feed temperature below 165℃C.a leak in the first stage demisterD.a cracked distillate pump vent line
The moisture equilibrium chart can be used to determine the ______．A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsB.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityC.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoD.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
As the temperature for an air mass decreases, the ______.A.absolute humidity increasesB.relative humidity increasesC.specific humidity increasesD.dew point rises
共用题干What is the Coolest Gas in the Universe?What is the coldest air temperature ever recorded on Earth?Where was this low temperature recorded ?The coldest recorded temperature on Earth was －91℃, which_____ (51) in Antarctica（南极洲） in 1983.We encounter an interesting situation when we discuss temperatures in_________(52).Temperatures in Earth orbit（轨道）actually range from about +120℃ to －120℃. The temperature depends upon ______(53)you are in direct sunlight or in shade.Obviously，－120℃ is colder than our body can ________ (54)endure.The space temperatures just discussed affect only our area of the solar________(55).Obviously,it is hotter closer to the Sun and colder as we travel__________(56)from the Sun,Scientigtg egtimate tern- peratures at Pluto are about －210℃．How cold is the lowest estimated temperature in the entire universe?Again,it depends upon your_________(57).We are taught it is supposedly__________(58)to have atemperature below absolute zero,which is－273℃，at which atoms do not move.Two scientists,Cornell and Wieman,have successfully______(59)down a gas to a temperature barely above absolute zero. They won a Nobel Prize in Physics in 2001 for their work一not a discovery in this case.Why is the two scientists'work so important to science?In the 1920s，Satyendra Nath Bose was studying an interesting_______(60)about special light par-tidles（微粒）we now call photons（光子）.Bose had trouble __________(61)other scientists to believe his theory,so he contacted Albert Einstein. Einstein’s calculations helped him theorize that atoms_______(62) behave as Bose thought一but only at very cold temperatures.Scientists have also discovered that ultra-cold（超冷）atoms can help them make the world'S atomic clocks even__________(63)accurate.These clocks are so accurate today they would oniy lose one second _________ (64)six million years!Such accuracy will help us travel in space because digtanee is velocity（速度）times time( d=vt).With the long distances involved in space _______(65),we need to know time as accurately as possibie to get accurate distance._________(63)A:thatB:suchC:muchD:more
Mysqldump was used to create a single schema backup; Shell mysqldump –u root –p sakila sakila2013.sql Which two commands will restore the sakila database without interfering with other running database?（）A、Mysql＞ USE sakila; LOAD DATA INFILE 'sakila2013.sql';B、Shell＞ mysql –u root –p sakila sakila2013.sqlC、Shell＞ mysql import –u root –p sakila sakila2013.sqlD、Shell＞ mysql –u root -p –e 'use sakila; source sakila2013.sql'E、Shell＞ mysql –u root –p –silent ＜ sakila2013.sql
A customer is considering a second p690 at a second site for Disaster Recovery purposes. Which of the following On Demand offerings is most applicable in this environment？（）A、On/Off CoDB、Reserve CoDC、Permanent CUoDD、Capacity Backup
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 vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.Aa separate air ejector unitBa direct unimpeded connection between second stage and salt water feed heaterCeither by vacuum drag or an external line from the first stage via a fixed orificeDthe fixed orifice provided in the steam supply line
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Which of the listed problems could produce a high absolute pressure within a flash type evaporator?（）AProduction of high salinity distillateBSeawater feed temperature below 165℃CA leak in the first stage demisterDA cracked distillate pump vent line
单选题Tube leaks in the distillate cooler of a two stage flash evaporator will result in （）.Aloss of second stage vacuumBcontamination of the distillateClower feed inlet temperatureDcontamination of the second stage condenser
单选题The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）ACrossBParallelCCounterDCircular
单选题When air is at its dew point it is at its（）Alowest absolute humidityBlowest relative humidityChighest absolute humidityDhighest relative humidity
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In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）ACondenser circulating water pumpBFeed-water heater drain pumpCDistillate pumpDAir ejector condenser drain pump
单选题A customer is considering a second p690 at a second site for Disaster Recovery purposes. Which of the following On Demand offerings is most applicable in this environment？（）AOn/Off CoDBReserve CoDCPermanent CUoDDCapacity Backup
单选题Which of the listed conditions will cause the feed water that has not flashed to vapor in the first-stage of a flash evaporator, to flow into the second-stage?（）AGravity siphon effectBHigher vacuum in the second-stageCDifference in brine density between first and second stagesDlower pressure in first-stage
单选题Bad valves operation of the reciprocating air compressors can be detected by observation of （）.Athe discharge temperature lowBthe discharge temperature highCthe discharge pressure riseDthe inter-stage pressure low
单选题In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon（）Athe temperature of the hydraulic fluidBthe flow rate of the hydraulic fluidCthe temperature of the cooling waterDall of the above
单选题A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）Avacuum drag from the auxiliary condensate systemBindividual vacuum pumpsCa single non-condensing air ejectorDa two stage air ejector
单选题The term "pour point" is defined as the lowest temperature at which lubricating oils will flow （）.ArapidlyBby gravityCthrough a standard orifice at a specified temperatureDat a rate of 60cc per second