单选题The temperature () a liquid changes its state from liquid to gas depends upon the liquid itself and upon the pressure () it is subjected in the containing vessel.Aat which/to whichBfrom which/at whichCto which/from whichDin which/on which

单选题
The temperature () a liquid changes its state from liquid to gas depends upon the liquid itself and upon the pressure () it is subjected in the containing vessel.
A

at which/to which

B

from which/at which

C

to which/from which

D

in which/on which


参考解析

解析: 暂无解析

相关考题:

The higher the temperature is, __________ the liquid evaporates. A、the fasterB、fasterC、the slower

The higher the temperature,()the liquid evaporates.A. the fasterB. fasterC. the slower

Liquid water changes to vapor, ___ is called evaporation. A、whichB、thatC、whatD、this

The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the( ). A.flash pointB.fire pointC.upper explosive limitD.lower explosive hmlt

Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ______.A.freezing pointB.floc point(浊点)C.condensing temperatureD.compression temperature

The flash point of a liquid refers to the temperature ______.A.at which a liquid will give off inflammable(易燃的) vaporsB.at which a liquid will burn steadilyC.at which a liquid will explodeD.that a liquid must reach before it will flow readily

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

单选题Reid vapor pressure is().Aexerted by liquid cargo on the sides of a tankBexerted by liquid cargo on a cargo hose bodyCthe lowest temperature and pressure that will cause a flammable liquid to give off vaporsDa measurement of the amount of flammable vapors given off by a liquid at a certain temperature

单选题In the process of (), liquid changes into gas.AevaporationBfrostingCcondensingDcompressing

单选题() is the temperature at which a liquid fuel gives off sufficient vapor to form an ignitable mixture near its surface.ASetting pointBDew pointCFlash pointDLean point

单选题A fluid coil will () large quantifies of heat when it changes state from a liquid to a vapor.AreleaseBabsorbCdevelopDregenerate

问答题The difference between a liquid and a gas is obvious (1)____ the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fills it to the level of a free surface. A gas forms no free surface but tends to diffuse throughout the space available; it must (2)____ be kept in a closed container, as in the (3)____ of a planet’s atmosphere. The distinction was a prominent feature of early theories (4)____(describe) the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be “dissolved” in a vapor without losing its identity, and another theory held that the two phases are made up of different kinds of molecules (分子). The theories now prevailing (5) t____ a quite different approach by emphasizing what liquids and gases have in common. They are both forms of matter (6)____ have no permanent structure, and they both flow easily. They are fluids.The (7)____(fundament) similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat. Suppose a closed container partially filled with a liquid is heated. The liquid expands, or in other (8)____, becomes less dense; some of it evaporates. In contrast, the vapor above the liquid surface becomes dense as the evaporated molecules are added to it. The combination of temperature and pressure (9)____ which the densities become equal is called the critical point. Above the critical point the liquid and the gas can no longer be (10)____(distinguish); there is a single, undifferentiated fluid phase of uniform density.

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The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of ().AfusionBvaporizationCcondensationDsublimation

单选题The flash point of a liquid refers to the temperature ()Aat which a liquid will give off inflammable vaporsBat which a liquid will burn steadilyCat which a liquid will explodeDthat a liquid must reach before it will flow readily

单选题In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the().AevaporatorBcompressorCexpansion valveDcondenser

单选题The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the ()Aflash pointBfire pointCupper explosive limitDlower explosive limit

单选题A condenser is a vessel in which() is deprived of its latent heat of vaporization and so changed to its liquid state.Asea waterBfresh waterCvapourDgas

单选题A definite advantage of using water as a fire extinguishing agent is its characteristic of().Aalternate expansion and contraction as water in a liquid state becomes a vaporBabsorption of smoke and gases as water is converted from a liquid to a vaporCrapid contraction as water is converted from a liquid to a vaporDrapid expansion as water absorbs heat and changes to steam

单选题The basic function of the centrifugal pump impeller is to ().Adirectly increase the pressure of the liquid being pumpedBdirectly increase the velocity of the liquid being pumpedCconvert the potential energy of the liquid to kinetic energyDseparate air from the liquid being pumped

单选题Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?()AAt the designed operating temperature, the liquid refrigerant charge has changed to a vaporBThe liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivityCThe sensing bulb is empty of liquid refrigerant charge at the designed operating temperatureDThe sensing bulb is never emptied of liquid refrigerant under normal operating conditions

单选题The heat required to change a substance from a liquid to a gas without experiencing a temperature change is defined as the latent heat of ().AfusionBvaporizationCsublimationDcondensation

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Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ().Afreezing pointBfloc pointCcondensing temperatureDcompression temperature

单选题What is the principal danger from the liquid in a half full tank onboard a vessel?()ACorrosion from the shifting liquidBRupturing of bulkheads from the shifting liquidCLoss of stability from free surface effectDHoling of the tank bottom from the weight of the shifting liquid

单选题The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its ().Aboiling pointBflash pointCviscosity pointDtoxic point