Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 25, Problem 5RQ
To determine
The three reasons due to which automatic pumpdown systems are used on refrigeration.
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Chapter 25 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 25 - Which is not a basic component of the compression...Ch. 25 - Describe modulating fluid flow.Ch. 25 - The purpose of the crankcase pressure-regulating...Ch. 25 - Describe the function of an electric evaporator...Ch. 25 - Prob. 5RQCh. 25 - Briefly describe the function of a...Ch. 25 - Two types of relief valves are_______and ______.Ch. 25 - Why is low-ambient control necessary?Ch. 25 - Which is not a method of low-ambient control on...Ch. 25 - Low-pressure switch
Ch. 25 - High-pressure switchCh. 25 - Low-ambient(switch)Ch. 25 - Oil safety switchCh. 25 - What is the function of the current sensing relay...Ch. 25 - Why is there a time delay in an oil safety...Ch. 25 - What is off-cycle defrost?Ch. 25 - Two types of off-cycle defrost are______and...Ch. 25 - Two methods for accomplishing defrost on...Ch. 25 - Filter drierCh. 25 - Heat exchangerCh. 25 - Suction accumulatorCh. 25 - ReceiverCh. 25 - Prob. 23RQCh. 25 - Prob. 24RQCh. 25 - What will happen if the float in an oil separator...Ch. 25 - The function of the evaporator pressure regulator...Ch. 25 - What is the function of the oil return hole or...Ch. 25 - What is the function of the pressure equalization...
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- Briefly explain what is meant by a subcritical refrigeration cycle, and list its four processes.arrow_forwardThree advantages of unitary, stand-alone refrigeration modules in supermarket refrigeration are ______and _______.arrow_forwardHow can liquid refrigerant be added to the refrigeration system when the system is out of refrigerant?arrow_forward
- Why do some condensers have to be cleaned with brushes and others with chemicals?arrow_forwardName two problems a refrigeration system may have if the condensing unit is exposed to a low-ambient condition when not equipped with a low-ambient head pressure control valve.arrow_forwardWhich part in the mechanical heat pump is used to increase the refrigerant pressure? Select one: a. Condenser b. Evaporator c. Expansion valve d. Compressorarrow_forward
- Discuss unit of refrigeration?arrow_forwardExplain the principle of refrigeration system and its componentsarrow_forwardB- Compare between the following: 1-Direct and reverse return closed piping systems. 2- Single stage and two stages vapor compression refrigeration systems. 3- Primary and secondary refrigerants.arrow_forward
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