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
Which of the listed problems could produce a high absolute pressure within a flash type evaporator?
A.production of high salinity distillate
B.seawater feed temperature below 165℃
C.a leak in the first stage demister
D.a cracked distillate pump vent line
相关考题：
Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A.Pressure-reducing valveB.Unloading valveC.Counterbalance valveD.Pressure-relief valve
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?A.A shortage of liquid refrigerant.B.Excessive frost on the evaporator.C.Excessive condenser cooling water.D.Insufficient condenser cooling water flow.
Which of the listed devices is used to measure pressure and convert it to an electrical signal?A.TransducerB.ReducerC.TransformerD.Rectifier
Which of the problems listed could cause erosion of the expansion valve disks and seats?A.Overcharging the system with refrigerantB.Faulty compressor suction valveC.Failure of the high pressure cutoutD.Flash gas formed in the liquid line
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Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）APressure-reducing valveBUnloading valveCCounterbalance valveDPressure-relief valve
单选题Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）AProper refrigerant chargeBFaulty expansion valveCInsufficient refrigerantDSolenoid valve stuck open
单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）Acold fuel oilBlow fuel oil pressureClow atomizing steam pressureDwater in the fuel oil
单选题Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）AImproper fuel rack positioningBLengthy opening of the exhaust valveCExcessively early injection timingDExtended light load operation
单选题Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）AWorn intake valve guidesBPitted pre-combustion chambersCLoose valve tappetsDHigh exhaust back pressure
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The domestic fresh water pump starters are controlled by pressure switches which operate when the pressure in the tank varies within predetermined limits as water is drawn offThe word “which” means （）.AstartersBpressure switchesCpressureDwater
单选题Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）Aclogged air filterBcompression strokeCburned exhaust valvesDall of the above
单选题Which of the petroleum products listed has the lowest flash point?（）AHydraulic oilBLubricating oilCDiesel oilDRefrigeration oil
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Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）AA shortage of liquid refrigerantBExcessive frost on the evaporatorCExcessive condenser cooling waterDInsufficient condenser cooling water flow
单选题Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）ATransducerBReducerCTransformerDRectifier
单选题The efficiency of a flash type evaporator can be increased by（）Alowering brine discharge densityBdecreasing the absolute pressure of each stageCincreasing the saltwater feed heater temperatureDincreasing the pressure at the spray pipe
单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.Aair bottleBair compressorCcrank caseDcombustion chamber
单选题Which of the listed set of conditions indicates early fuel injection timing?（）ALoss of engine power and high exhaust temperaturesBHigher than normal firing pressure and low exhaust temperaturesCHigh fuel consumption and high exhaust temperaturesDLower than normal compression pressure and high exhaust temperature
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When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）ACO2BMethyl chlorideCR-22DSulphur dioxide
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Which one of the followings might not be employed to create vacuum for flash type evaporator? （）Ahigh-pressure steam-driven air-ejectorBmotor-driven vacuum pumpCwater-motivated air eductorDcentrifuge pump
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Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）AThe condenser and the expansion valveBThe king valve and the solenoid valveCThe compressor and the expansion valveDThe condenser and the solenoid valve
单选题Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）AThermal expansion valve frozen openBSuction gas heat exchanger bypassedCCondenser clogged or fouledDHigh pressure cutout switch inoperative