单选题The vapor pressure of a substance（）.Adecreases as temperature increasesBincreases with the temperatureCis not affected by temperatureDmay increase or decrease as the temperature rises
单选题
The vapor pressure of a substance（）.
A
decreases as temperature increases
B
increases with the temperature
C
is not affected by temperature
D
may increase or decrease as the temperature rises
参考解析
解析：
暂无解析
相关考题：
Substance Dependence refers to a maladaptive pattern of substance use leading to clinically significant impairment or distress characterized by things like () A、toleranceB、spending lots of time in activities to obtain the substanceC、withdrawD、Taking the substance in larger amount than before
The passage implies that cellulose is a very porous substance because it contains______.A．a substance that creates pressureB．millions of tiny holesC．a substance that dissolves itD．liquid medicine
The expression THE AIR IS SATURATED means ______.A.the relative humidity is 100%B.the vapor pressure is at its minimum for the prevailing temperatureC.precipitation has commencedD.cloud cover is 100%
How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
The dew point is reached when the ______.A.temperature of the air equals the temperature of the seawaterB.atmospheric pressure is 14.7 lbs. per square inchC.relative humidity reaches 50%D.air becomes saturated with water vapor
The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．A.Soluble stateB.Solid stateC.Liquefied stateD.Inert state
Reid vapor pressure is ______．A.exerted by liquid cargo on the sides of a tankB.exerted by liquid cargo on a cargo hose bodyC.the lowest temperature and pressure that will cause a flammable liquid to give off vaporsD.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
What best describes for how long a gas-free test is good ________．A.For as long as is indicated on the gas-free certificateB.For the instant that it is madeC.Until valves in line with the tank or compartment are reopenedD.Until changes in temperature or pressure affect the vapor content in the space
You are on a tanker designed to carry molten sulfur．Which statement is TRUE ________．A.There must be two portable toxic vapor detectors on boardB.The cargo tank ventilation system must maintain the H2S vapor concentration at 1.85% or more by volumeC.Cargo temperature may be taken by portable thermometersD.The pressure in the heating coils in the tanks must be less than that of the cargo exerted on them
A microbarograph is a precision instrument that provides a ______．A.charted record of atmospheric temperature over timeB.charted record of atmospheric pressure over timeC.graphic record of combustible gases measured in an atmosphereD.graphic record of vapor pressure from a flammable/combustible liquid
A heated bulkhead has the effect on a hygroscopic commodity of ______.A.causing moisture to accumulate against the bulkheadB.lowering the vapor pressure of the commodityC.lowering the dew point of the airD.raising the vapor pressure of the commodity
单选题How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）ADe-energizes the charged mist effectBMaintains a positive pressure on the vent header to cool the flammable vaporsCInert gas filters out the flammable vapors from the cargo tank spacesDInert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
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In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.AevaporatorBcompressorCcondenserDnone of the above
单选题The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.Asoluble stateBsolid stateCliquefied stateDinert state
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Vapor given off by a flammable liquid will burn when ignited provided（）Athe vapor and air mixture is too richBit is mixed with certain proportions of airCthe vapor is too little compared to the airDit is of heavy toxicity
单选题A heated bulkhead has the effect on a hygroscopic commodity of（）.Acausing moisture to accumulate against the bulkheadBlowering the vapor pressure of the commodityClowering the dew point of the airDraising the vapor pressure of the commodity
单选题When the relief valve opens it discharges high pressure refrigerant vapor to the （）.Aliquid strainerBrefrigerant inlet of the condenserCinlet side of the evaporatorDsuction side of the compressor
单选题The dew point is reached when the（）.Atemperature of the air equals the temperature of the seawaterBatmospheric pressure is 14.7 lbs. per square inchCrelative humidity reaches 50%Dair becomes saturated with water vapor
单选题A microbarograph is a precision instrument that provides a（）.Acharted record of atmospheric temperature over timeBcharted record of atmospheric pressure over timeCgraphic record of combustible gases measured in an atmosphereDgraphic record of vapor pressure from a flammable/combustible liquid
单选题A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.Ahigh pressure liquid lineBlow pressure liquid lineChigh pressure vapor lineDlow pressure vapor line
单选题The refrigerant leaves the evaporator of a refrigeration system as a low pressure （）.Asub-cooled liquidBhigh temperature liquidCoil saturated liquidDsuperheated vapor
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What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）ARefrigeratorBRefrigerantCCooling mediumDBrine
单选题Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）ABall floatBThermostaticCBimetallicDImpulse