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 45, Problem 8RQ
Frost accumulates on the evaporators of forced-draft refrigerators because
A. they are generally located within a house.
B. they are generally located in high-humidity areas.
C. they are low-temperature appliances.
D. there is a heat exchange with the suction line.
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Chapter 45 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 45 - The typical temperature inside the fresh-food...Ch. 45 - The operating condition for the single compressor...Ch. 45 - When the air temperature in a domestic freezer is...Ch. 45 - Typical head pressures should correspond to a...Ch. 45 - Using the temperature/pressure chart in Unit 3,...Ch. 45 - Using the pressure/temperature chart in Unit 3,...Ch. 45 - If a forced-draft evaporator fan motor is wired in...Ch. 45 - Frost accumulates on the evaporators of...Ch. 45 - The defrost cycle in a domestic refrigerator may...Ch. 45 - Prob. 10RQ
Ch. 45 - What are the two types of evaporators found in...Ch. 45 - Refrigerators currently being manufactured in the...Ch. 45 - Condensers in these refrigerators are...Ch. 45 - Home freezers are air-cooled and may have...Ch. 45 - Induced-draft condensers are typically used with...Ch. 45 - The capillary tube metering device is usually...Ch. 45 - Prob. 17RQCh. 45 - If the compressor has liquid refrigerant returning...Ch. 45 - Some freezers may have ______heaters to prevent...Ch. 45 - Welded ______sealed compressors are normally used...Ch. 45 - Special heaters called ______heaters are often...Ch. 45 - Prob. 22RQCh. 45 - Prob. 23RQCh. 45 - The adjustment device used for low atmospheric...Ch. 45 - Prob. 25RQ
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- C, The air pressure and temperature increase while the volume decrease O d. The air pressure and temperature decrease while the volume increase Which of the following does not help in collecting results in the mechanical heat pump? Select one: O a. Pressure gage b. Flowmeter C. Wattmeter O d. Receiverarrow_forwardWhere must a suction-line drier be placed in a heat pump after a motor burnout?arrow_forwardA(n) ______well draws water from the top of thewater column, circulates it through the heat pump, and then returns the water to the bottom of the water column.arrow_forward
- A tankless water-heating system gets its heat from thesystem's_______.arrow_forwardA refrigerant system's evaporator typically runs about ______degrees of superheat.arrow_forward1. An air-source heat pump is a heat-pump system that uses air: a. as the system refrigerant. b. as the heat source when operating in the cooling mode. c. as the heat sink when operating in the heating mode. d. as the heat source when operating in the heating mode. 2. According to the Department of Energy, duct leakage can result in a energy loss? a. 10% b. 20% c. 30% d. 40% 3. As the outside ambient temperature drops, the efficiency of a heat-pump system operating in the mode will: a. heating, drop b. heating, rise c. cooling, rise d. Both a and c are correct.arrow_forward
- When 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_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_forwardO a. None of these O b. Absolute pressures and heat capacity ratio O C. Absolute pressures and temperatures O d. Gauge pressures and temperatures In perfect gas law experiment, the pressure pump coupling is used to connect the vacuum vessel to the pump discharge connector. Select one: O a. False O b. True Which part in the mechanical heat pump is used to reduce the refrigerant pnessule? Select one:arrow_forward
- A 1-ton air conditioner is a unit that will remove the amount of heat neededto melt one ton of ice in 24 hours. A ton has 2,000 pounds in it.a. If 144 Btu of heat are needed to melt 1 pound of ice, how many Btus woulda 1-ton air conditioner remove in 24 hours?b. How many Btus would a 1-ton air conditioner remove in 1 hour?arrow_forwardFind the true order of the components of the refrigeration cycle? a) Evaporator-Compressor-Condenser-Expansion valve b) Condenser-Expansion valve-Evaporator-Compressor c) Evaporator-Compressor-Expansion valve-Condenser d) Expansion valve-Condenser-Compressor-Evaporator e) Compressor-Expansion valve-Condenser-Evaporatorarrow_forwardHeat expulsion occurs in what section of a heat pump system when operating in the heat mode? A. accumulator B. evaporator C. receiver D. condenserarrow_forward
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