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ID: A 41. what could happem if a semi-hermetic com is edith dhe waction srvice valve hack the discharge valve frontseated? The system will pump down a. The head gasket may blow out or other damage to compresssor may oceur 4 The compressor capacity will increase. b. The system will run normally 42. The screw-type compressor is used primarily in | large industrial refrigeration and air-conditioning systems b. a. Cmall commercial refrigeration units residential air conditioning a domestic refrigerators *3. Which of the following terminal combinations would show an open cireuit if the internal overload device in hermetie compressor should open due to excessive heat? common to start a. start to run b. common to run d. both a andb 44. Ifa thermoutati

ID: A 41. what could happem if a semi-hermetic com is edith dhe waction srvice valve hack the discharge valve frontseated? The system will pump down a. The head gasket may blow out or other damage to compresssor may oceur 4 The compressor capacity will increase. b. The system will run normally 42. The screw-type compressor is used primarily in | large industrial refrigeration and air-conditioning systems b. a. Cmall commercial refrigeration units residential air conditioning a domestic refrigerators *3. Which of the following terminal combinations would show an open cireuit if the internal overload device in hermetie compressor should open due to excessive heat? common to start a. start to run b. common to run d. both a andb 44. Ifa thermoutati

Refrigeration and Air Conditioning Technology (MindTap Course List)
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems
Section: Chapter Questions
Problem 9RQ: The approach temperature for the evaporator is A. the difference between the suction and head...
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41. What could happen if a semi-hermetic compressor is opersted with the uction service valve hackseated and ID: A the discharge valve frontseated? The system will pump down a. The head gasket may blow out or other damage to compresssor may oceur d. The compressor capacity will increase. b. The system will eun normally 42. The screw-type compressor is used primarily in a large industrial refrigeration and air-conditioning systems b. small commercial refrigeration units residential air conditioning d. domestic refrigerators *3. Which of the following terminal combinations would show an open circuit if the internal overload device hermetie compressor should open due to excessive heat? common to start b. a. c. start to run common to run d. both a andb 4. Ira thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would a. Liquid refrigerant would flow back to the compressor. open. b. The superheat in the evaporator would decrease. a. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. a. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster prevent the expansion valve from frosting up d. allow refrigerant to expand in the a. c. compressor 47. The primary function of an expansion device is to a. produce a reduction in the pressure on the liquid refrigerant lower the boiling point of the refrigerant far enough below the temperature of the load to get the needed heat transfer rate d. all of the above c. b. regulate the flow of refrigerant into the evaporator 48. The TXV sensing bulb is mounted on the liquid line between the condenser c. and the TX valve b. at the inlet to the condenser on the suction line between the evaporator and the compressor d. on the compressor discharge line a. 49. The purpose of a capillary tube is to a. regulate the refrigerant flow into the evaporator b. lower the pressure of the liquid refrigerant c. lower the boiling point of the refrigerant d. all of the above
Transcribed Image Text:41. What could happen if a semi-hermetic compressor is opersted with the uction service valve hackseated and ID: A the discharge valve frontseated? The system will pump down a. The head gasket may blow out or other damage to compresssor may oceur d. The compressor capacity will increase. b. The system will eun normally 42. The screw-type compressor is used primarily in a large industrial refrigeration and air-conditioning systems b. small commercial refrigeration units residential air conditioning d. domestic refrigerators *3. Which of the following terminal combinations would show an open circuit if the internal overload device hermetie compressor should open due to excessive heat? common to start b. a. c. start to run common to run d. both a andb 4. Ira thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would a. Liquid refrigerant would flow back to the compressor. open. b. The superheat in the evaporator would decrease. a. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. a. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster prevent the expansion valve from frosting up d. allow refrigerant to expand in the a. c. compressor 47. The primary function of an expansion device is to a. produce a reduction in the pressure on the liquid refrigerant lower the boiling point of the refrigerant far enough below the temperature of the load to get the needed heat transfer rate d. all of the above c. b. regulate the flow of refrigerant into the evaporator 48. The TXV sensing bulb is mounted on the liquid line between the condenser c. and the TX valve b. at the inlet to the condenser on the suction line between the evaporator and the compressor d. on the compressor discharge line a. 49. The purpose of a capillary tube is to a. regulate the refrigerant flow into the evaporator b. lower the pressure of the liquid refrigerant c. lower the boiling point of the refrigerant d. all of the above
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