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 43, Problem 8RQ
Which metering device is most efficient in heat pumps?
A. A thermostatic expansion valve
B. An automatic expansion valve
C. A capillary tube
D. An orifice or restrictor
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Which metering device is most efficient in heat pumps?A. A thermostatic expansion valveB. An automatic expansion valveC. A capillary tubeD. An orifice or restrictor
What are the components of a pumping system?
Y- The inlet pressure of a refrigerant
compressor is called
Discharge pressure
Critical pressure O
Back pressure O
Suction pressure
Chapter 43 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 43 - How does a heart pump resemble a refrigeration...Ch. 43 - Name the three common sources of heat for heat...Ch. 43 - What large line connects the indoor unit to the...Ch. 43 - Why is the indoor unit not called an evaporator?Ch. 43 - When is the outdoor unit called an evaporator? A....Ch. 43 - The indoor coil is called a condenser during...Ch. 43 - Why is it important to have drainage for the...Ch. 43 - Which metering device is most efficient in heat...Ch. 43 - Where is the only permanent suction line on a heat...Ch. 43 - What type of drier may be used in the liquid line...
Ch. 43 - Where must a suction-line drier be placed in a...Ch. 43 - What controls the heat pump to determine whether...Ch. 43 - Can a heat pump switch from heating to cooling and...Ch. 43 - What must be done when frost and ice build up on...Ch. 43 - True or False: All heat pumps are practical...Ch. 43 - Why are scroll compressors more efficient than...Ch. 43 - Describe why variable-speed compressor motors are...
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- Which of the following devices does not use Bernoulli's equation as its working principle? a. Pitot tube b. piezo meter c. Orifice-meter d. Venturimeterarrow_forwardAn automatic expansion valve system responds to an overcharge of refrigerant by A. low suction pressure. B. high head pressure. C. a flooded compressor. D. both B and Carrow_forwardWhen evacuating a refrigeration system that has solenoid valves, what special procedure must be followed?arrow_forward
- Which of the following statements is not true about orifice tube systems? The suction line must be cool to the touch from the evaporator outlet to the compressor. The liquid line from the condenser outlet to the evaporator inlet should be cool. The evaporator should feel very cold. The accumulator must be cool to the touch.arrow_forwardThe capillary tube metering device is usually fastened to the______for heat exchange. A. suction line B. compressor discharge line C. liquid linearrow_forwardWhy is a circulating brine system more attractive for ship refrigeration than individual evaporators?arrow_forward
- Quality means _________ when referring to a refrigerant.arrow_forwardWhere must a suction-line drier be placed in a heat pump after a motor burnout?arrow_forwardWhich of the following devices does not use Bernoulli's equation as its working principle? a. Orifice-meter b. Venturimeter c. piezo meter d. Pitot tubearrow_forward
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