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9. A solenoid valve that opens a small valve that directs pressure to open and close a larger valve is A. direct-acting B. normally closed C. pilot-operated D. All of the above. lation on an evaporator a 16.

9. A solenoid valve that opens a small valve that directs pressure to open and close a larger valve is A. direct-acting B. normally closed C. pilot-operated D. All of the above. lation on an evaporator a 16.

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 16RQ: Which of the following metering devices is used in low-pressure chillers? A. A low- or high-side...
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pressure to open and close a larger valve is 9. A solenoid valve that opens a small valve that directs _is used to desuperheat hot-gas vapor from the che evaporator ate that the 16. The purpose 1 a A. bypass device A. direct-acting B. normally closed C. pilot-operated D. All of the above. 10. Ice accumulation on an evaporator can be melted by automatically opening a system's B. control pressur C. isolate D. shut of gets to on the high side quickly A. hot-gas defrost valve B. liquid receiver C. manifold valve 17. Which of t refrigerar when the D. moisture indicator A. Fusibl В. Mani- C. Ruptr D. Sprim valve alleviates low pressure and 11. A temperature conditions by diverting some refrigerant vapor from the compressor discharge directly to the low side. stributor A. desuperheater B. hot-gas bypass C. relief 18. Which o valves is A. A blo D. riser B. Relic C. Reli 12. A hot-gas bypass valve directs hot-gas refrigerant from the discharge line to the usir A. condenser D. Spr B. liquid line C. liquid receiver D. low side of the system rding service pre 19. A devi g using to a pr 13. A refrige ing pressure discharge line. A. condenser pressure regulator B. crankcase pressure regulator C. liquid injection valve D. low-ambient control when A. cC t the outlet of B. cr arned using a C. re D. sp 20. A de 14, The nurg Lutor is to
Transcribed Image Text:pressure to open and close a larger valve is 9. A solenoid valve that opens a small valve that directs _is used to desuperheat hot-gas vapor from the che evaporator ate that the 16. The purpose 1 a A. bypass device A. direct-acting B. normally closed C. pilot-operated D. All of the above. 10. Ice accumulation on an evaporator can be melted by automatically opening a system's B. control pressur C. isolate D. shut of gets to on the high side quickly A. hot-gas defrost valve B. liquid receiver C. manifold valve 17. Which of t refrigerar when the D. moisture indicator A. Fusibl В. Mani- C. Ruptr D. Sprim valve alleviates low pressure and 11. A temperature conditions by diverting some refrigerant vapor from the compressor discharge directly to the low side. stributor A. desuperheater B. hot-gas bypass C. relief 18. Which o valves is A. A blo D. riser B. Relic C. Reli 12. A hot-gas bypass valve directs hot-gas refrigerant from the discharge line to the usir A. condenser D. Spr B. liquid line C. liquid receiver D. low side of the system rding service pre 19. A devi g using to a pr 13. A refrige ing pressure discharge line. A. condenser pressure regulator B. crankcase pressure regulator C. liquid injection valve D. low-ambient control when A. cC t the outlet of B. cr arned using a C. re D. sp 20. A de 14, The nurg Lutor is to
14. The purpose of a crankcase pressure regulator is to C. liquid injection valve D. low-ambient control A. ensure that compressor discharge pressure is sufficiently high B. increase liquid line pressure in low-ambient conditions C. maintain a sufficiently low pressure in the compressor D. show the flow of liquid refrigerant 15. A commercial refrigeration system with a single suction line and multiple evaporators can maintain a different temperature at each evaporator by controlling and differing A. crankcase pressure B. evaporator pressure C. head D. liquid line temperature pressure
Transcribed Image Text:14. The purpose of a crankcase pressure regulator is to C. liquid injection valve D. low-ambient control A. ensure that compressor discharge pressure is sufficiently high B. increase liquid line pressure in low-ambient conditions C. maintain a sufficiently low pressure in the compressor D. show the flow of liquid refrigerant 15. A commercial refrigeration system with a single suction line and multiple evaporators can maintain a different temperature at each evaporator by controlling and differing A. crankcase pressure B. evaporator pressure C. head D. liquid line temperature pressure
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