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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Textbook Question
Chapter 8, Problem 7RQ
Air in a refrigeration system causes which of the following problems?
A. Acid buildup
B. Moisture
C. Copper plating
D. All of the above
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3) What are some criteria that need to be considered in the selection of a refrigerant?
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Which of the following statements is false?
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The receiver/dryer is a storage tank for the liquid refrigerant from the condenser.
An accumulator is not used in any system with a receiver/dryer.
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Which list states the correct order of components for the absorption refrigeration? A) Evaporator, then absorber, then concentrator, then condenser. B) Absorber, then condenser, then evaporator, then concentrator. C) Condenser, then absorber, then concentrator, then evaporator.
Chapter 8 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 8 - The low-pressure side of the system must not be...Ch. 8 - Name and briefly describe the six classes of...Ch. 8 - The ________is both the greatest asset and the...Ch. 8 - Why should oxygen or compressed air never be used...Ch. 8 - List some of the foreign matter that may enter a...Ch. 8 - True or False: A vacuum pump can remove any type...Ch. 8 - Air in a refrigeration system causes which of the...Ch. 8 - The only two products that should be circulating...Ch. 8 - In order to remove moisture from a refrigeration...Ch. 8 - Are the best vacuum pumps one-stage or two-stage?
Ch. 8 - Name the two types of vacuum procedures used by...Ch. 8 - What can be done to get water out from under the...Ch. 8 - When evacuating a refrigeration system that has...Ch. 8 - What is today's most accurate type of deep vacuum...Ch. 8 - _________microns are in 1 inch.Ch. 8 - Briefly describe the method for cleaning up a...Ch. 8 - What is the advantage of using large gauge lines...Ch. 8 - Why is it important to change the oil on a vacuum...Ch. 8 - Describe the meaning of a deep vacuum, and explain...Ch. 8 - List the main advantages of a microfoam leak...Ch. 8 - What could an oily dust spot on a condenser or...Ch. 8 - Why should a condenser be covered with a sheet...Ch. 8 - Leaks that occur only when the unit is in...Ch. 8 - Briefly describe a combination-dependent leak.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Why do some condensers have to be cleaned with brushes and others with chemicals?arrow_forwardQuality means _________ when referring to a refrigerant.arrow_forwardWhen a refrigeration system's suction line is noticeably cold instead of just being cool , it probably contains refrigerant . A. high -pressure liquid B. high -pressure vapor C. low-pressure liquid D. low -pressure vaporarrow_forward
- Which process would best represent the opposite ofexhausting air from a system?A. CoolingB. VentilatingC. HeatingD. Filteringarrow_forwardwhat is the best refrigerant use for Cryogenic plant? (not a nitrogen) please include referencearrow_forwardThe standard that a refrigerant must meet after it has been reclaimed and before it can be sold to another owner is A. ANSI 7000. B. ANSI 700. C. EPA 7000. D. AHRI 700.arrow_forward
- What is the coil-to-air temperature relationship for a refrigeration system designed for minimum food dehydration? A. 12 to 15F B. 10 to 15F C. 8 to 20F D. 8 to 12Farrow_forwardWhile discussing the operation of air-conditioning systems: Technician A says that in order for the refrigerant to release heat, it must be at a low temperature and pressure. Technician B says that in order for the refrigerant to absorb heat, it must be at a high temperature and pressure. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardBriefly describe an oil-less refrigerant recovery unit.arrow_forward
- What lubricates the refrigeration compressor? A. Refrigerant B. Moisture C. Desiccants D. Oilarrow_forwardTechnician A feels up and down the face or along the return bends of the condenser for a temperature change and says that there should be a gradual change from hot to warm from the bottom to the top. Technician B says that a restriction in the condenser will be evident by a sudden change in temperature. Who is correct? Technician A only Technician B only Both A and B Neither A nor Barrow_forwardRefrigerant works by absorbing ____ from the environment where cooling is requiredarrow_forward
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