单选题A refrigerant boils and vaporizes in the () in a compression refrigeration system.Aliquid receiverBcompressorCcondenserDcooling coil

单选题
A refrigerant boils and vaporizes in the () in a compression refrigeration system.
A

liquid receiver

B

compressor

C

condenser

D

cooling coil


参考解析

解析: 暂无解析

相关考题:

Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?A.compression must be low for effective spark ignitionB.compression must be low for required horsepower and torque generationC.compression must be low to prevent pre-ignitionD.compression must be low to have effective pre-ignition

Normally,water boils at at _________of 100℃.

In a chilled(冷的) water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.A.increasing refrigerant pressure in the coilB.increasing chilled water flow through the coolerC.sub-cooling the refrigerant in the condenserD.superheating the refrigerant in the compressor

The function of the sentence ---Water boils at 100 degrees Centigrade is ______.A.interrogativeB.directiveC.informativeD.performative

Which statement is true about compression subnets?()A、Compression subnets are turned on by default.B、Compression subnets advertise remote routes.C、Compression subnets are usually LAN-side subnets.D、Compression subnets are usually WAN-side subnets.

You want to use RMAN to create compressed backups.  Which statement is true about the compression algorithms that RMAN can use?()A、 The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm.B、 The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm.C、 The ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm.D、 Only the BZIP2 compression algorithm can be used to make compressed backups to disk.

单选题As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into ().AliquidBoily mixtureCemulsionDvapor

单选题In a compression refrigeration plant the refrigerant is under low pressure in the () and under high pressure in the ().Acompressor;condenserBcondenser;evaporatorCthrottle valve;evaporatorDevaporator;condenser

单选题Because of the reduced () in the distillation system, some of the sea water boils as it flows through the tubes of the evaporator.ApressureBtemperatureCdensityDvolume

单选题In a compression refrigeration plant the refrigerant flows from the expansion valve and through the () where it absorbs heat from the space being cooled and becomes a gas or vapor.AcompressorBcondenserCthrottle valveDevaporator

单选题If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is ().Atoo much refrigerant in the systemBoil entrained in the refrigerantCless than a full charge of refrigerant in the systemDice crystals forming in the refrigerant

单选题The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by ().Apassing it through the expansion valveBcondensing refrigerant in the system condenserCpassing the gaseous refrigerant through the heat interchanger on the suction side of the compressorDmaintaining a high pressure on the systems receiver

单选题Before charging a refrigeration unit, the refrigerant charging lines should be()Aflushed with clean refrigerant oilBpurged with the refrigerantCwashed with an ammonia and alcohol solutionDgrounded to compressor

单选题Which of the following terms would best describe the temperature at which a liquid boils at a given pressure?()ADegree of saturationBSaturation temperatureCSuperheated temperatureDDegree of superheat

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

多选题Which two statements regarding compressed backups in Recovery Manager (RMAN) are true?()ABackup compression is disabled by default.BBackup compression can be used with both backup sets and image copies.CBackup compression cannot be enabled using the CONFIGURE command.DBackup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.EBackup compression applies to only backup sets.FBackup compression applies to only image copies.

单选题In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ().Aincreasing refrigerant pressure in the coilBincreasing chilled water flow through the coolerCsub-cooling the refrigerant in the condenserDsuperheating the refrigerant in the compressor

单选题Saltwater is typically provided to a refrigeration system to ().Acool the expansion valveBprevent refrigerant superheatingCcondense the refrigerant gasDprevent motor overheating

单选题In a compression refrigeration plant the hot, high pressure refrigerant gas is cooled by the sea water and becomes liquid in the ().AcompressorBcondenserCthrottle valveDevaporator

单选题Because of the reduced () in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.AtemperatureBwater levelCpressureDrate of flow

单选题For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?()AAn increase in compression ratio will increase the ignition lagBAn increase in compression ratio will decrease the ignition lagCA decrease in compression ratio will decrease the ignition lagDA decrease in ignition lag will increase the compression ratio

单选题The component of a refrigerating system in which the refrigerant vaporizes and absorbs heat is known as the ().AcondenserBvapor generatorCaccumulatorDevaporator

单选题The thermostatic valve has a throttling action, that is to say the valve can()Astop the refrigerant from flowingBforce the refrigerant to flowCcause the refrigerant pressure to riseDcause the refrigerant pressure to fall

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When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().Aincrease the amount of cooling water to the condenserBdecrease the amount of cooling water to the condenserCadd more refrigerant to the systemDremove some refrigerant from the system

单选题You want to use RMAN to create compressed backups.Which statement is true about the compression algorithms that RMAN can use?()AThe BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm.BThe ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm.CThe ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm.DOnly the BZIP2 compression algorithm can be used to make compressed backups to disk.

单选题Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?()AHigher compression ratios create higher temperatureBHigher temperatures create higher compression ratiosClow temperatures create higher compression ratiosDHigher compression ratios create low temperatures