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 7RQ
If a forced-draft evaporator fan motor is wired in parallel with the compressor, when will it run?
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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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- What is the difference between an even and an uneven parallel compressor system?arrow_forwardWhat happens to the refrigerant in the condenser?arrow_forwardWhich 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_forward
- What advantage does a capillary tube have over a thermostatic expansion valve?arrow_forwardThe approach temperature for the evaporator is A. the difference between the suction and head pressures converted to temperature. B. the difference between the refrigerant boiling temperature and the suction-line temperature. C. the difference between the refrigerant boiling temperature and the inlet water temperature. D. the difference between the refrigerant boiling temperature and the leaving-water temperature.arrow_forwardHow can an evaporator be tested for efficiency?arrow_forward
- The approach temperature for the evaporator isA. the difference between the suction and head pressuresconverted to temperature.B. the difference between the refrigerant boiling temperatureand the suction-line temperature.C. the difference between the refrigerant boiling temperatureand the inlet water temperature.D. the difference between the refrigerant boiling temperatureand the leaving-water temperature.arrow_forwardPlease explain the schematic diagram.arrow_forward8. What would be done to increase the compressor speed on a belt-driven compressor? A. Decrease drive pulley size B. Increase drive pulley size C. Increase driven pulley size 13. What lubricates the refrigeration compressor? A. Refrigerant B. Moisture C. Desiccants D. Oil D. Both A andC 9. Describe the reciprocating compressor piston, rod, crankshaft, valves, valve plate, head, shaft seal, internal motor overload device, pilot-duty motor overload de- vice, and coupling. 10. Name two things in the design of a reciprocating com- pressor that control the efficiency of the compressor. А. 14. What can the service technician do to keep the refrig- eration system operating at peak efficiency? 15. List the main advantage that a discus compressor's valve plate design has over a conventional piston-type В. 11. At what speeds in rpm does a hermetic compressor nor- mally turn? A. 1750 В. 3450 C. 4500 D. Both A and B 12. What effect does a slight amount of liquid refrigerant have on a compressor…arrow_forward
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