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单选题
The temperature of the refrigerant in the evaporator coil depends mostly upon the ().
A

refrigerant pressure in the evaporator

B

cooling water temperature to the condenser

C

heat load in the refrigerator compartment

D

solenoid valve in the liquid line


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更多 “单选题The temperature of the refrigerant in the evaporator coil depends mostly upon the ().A refrigerant pressure in the evaporatorB cooling water temperature to the condenserC heat load in the refrigerator compartmentD solenoid valve in the liquid line” 相关考题
考题 The temperature of the refrigerant in the evaporator coil depends mostly upon the ___.A.refrigerant pressure in the evaporatorB.cooling water temperature to the condenserC.heat load in the refrigerator compartmentD.solenoid valve in the liquid line

考题 A thermostatic expansion valve is properly controlling evaporator superheat. Adjusting this valve to lower the superheat will result in a/anA.evaporator pressure decreaseB.evaporator coil over-feedC.evaporator capacity increaseD.expansion valve diaphragm rupture

考题 If the superheat value of a thermostatic expansion valve is set too low, the _.A.the suction line will be abnormally cold and liquid may slug back to the compressorB.the suction line will be hot due to a reduced amount of refrigerant returning to the compressorC.the temperature of the refrigerant within the condenser will remain the sameD.the temperature of the refrigerant passing through the sub-cooler will decrease

考题 Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.A.carbon deposits on the compressor suction valvesB.the evaporator temperature to increaseC.rapid corrosion of the thermal expansion valveD.no operating problems

考题 单选题When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be ().A dryB wetC super-cooledD superheated

考题 单选题A refrigerant boils and vaporizes in the () in a compression refrigeration system.A liquid receiverB compressorC condenserD cooling coil

考题 单选题The refrigerant flows through the evaporator, where it () heat from the refrigerated space.A extractsB releasesC gives noD absorbs no

考题 单选题An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by ().A restriction in refrigerant pipingB air and non-condensable gases in the condenserC water in the refrigerantD flooding back of liquid refrigerant from the evaporator

考题 单选题Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to ().A maintain adequate coil back pressureB prohibit flashing in the liquid lineC reduce refrigerant volume in the systemD reduce compressor discharge line loading

考题 单选题The heat gained per pound of refrigerant in the evaporator is known as the().A latent heat of vaporizationB sensible heatC refrigerating effectD specific heat of vaporization

考题 单选题The bulb for the thermal expansion valve is located()A in the middle of evaporator coilsB near the evaporator coil outletC near the evaporator coil inletD on the bottom row of evaporator coils

考题 单选题Because the expansion valve is just () way open, the refrigerant is under low pressure in the evaporator.A littleB fewC a littleD a few

考题 单选题The saturation temperature of the refrigerant must be () that required in the evaporator refrigerated space.A aboveB belowC equal toD None of the above

考题 单选题Which of the following statements is correct concerning a typical shipboard multi-coil refrigeration system?()A The liquid receiver functions to collect and remove non-condensable gasesB A thermostatic expansion valve is used to control refrigerated space temperatureC Refrigerant temperature in an evaporator is directly related to refrigerant pressureD Dehydrators must be used continuously in a refrigeration system

考题 单选题A refrigerant gives up heat when it goes through ().A condenserB regurgitateC evaporatorD boil coil

考题 单选题A refrigerant with oil in solution has a ().A higher boiling temperature for a given pressure than does a pure refrigerantB lower boiling temperature for a given pressure than does a pure refrigerantC boiling pressure equal to that of a pure refrigerant at a given pressureD boiling point will not be affected by entrained oil

考题 单选题In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?()A its pressure and temperature are both loweredB its pressure and temperature are both raisedC its pressure is lowered and its temperature is raisedD its pressure is raised and its temperature is lowered

考题 单选题Both the temperature and the pressure of the refrigerant are increased in the ().A compressorB condenserC evaporatorD expansion valve

考题 单选题The thermal expansion valve reacts directly to the ()A temperature in the space being cooledB liquid refrigerant pressure at the solenoid valveC pressure drop across the evaporator coilsD refrigerant gas superheat at the coil outlet

考题 单选题The refrigerant leaves the evaporator of a refrigeration system as a low pressure ().A sub-cooled liquidB high temperature liquidC oil saturated liquidD superheated vapor

考题 单选题The refrigerating agent can () at low temperature in the evaporator.A expandB evaporateC condenseD distil

考题 单选题If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().A increase the capacity of the coilB increase the superheat at the bulbC deliver more refrigerant to the coilD decrease the capacity of the coil

考题 单选题In practice, the refrigerant flow after the evaporator is designed to ensure that the vapor leaving the evaporator is slightly ().A saturatedB super-cooledC wetD superheated

考题 单选题Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ().A freezing pointB floc pointC condensing temperatureD compression temperature

考题 单选题Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a()A solenoid valveB low pressure cutout switchC king valveD thermal expansion valve

考题 单选题If the compressor-discharge temperature is higher than the receiver temperature()A increase the amount of cooling water to the condenserB decrease the amount of cooling water to the condenserC add more refrigerant to the systemD remove some of the refrigerant from the system

考题 单选题Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause ().A carbon deposits on the compressor suction valvesB the evaporator temperature to increaseC rapid corrosion of the thermal expansion valveD no operating problems