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 46, Problem 12RQ
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The correct option for the given statement.
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The two popular operating voltages for residences are_________ V and _________ V.
The different descriptions for fluid power conductors (lines). The ___________ lines are connected to the output device
a. suction
b. return/exhaust
c. actuator
d. supply
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
A. the heating effect of current alone
B. hysteresis loss alone
C. both the heating effect of current and hysteresis loss
D. intense sunlight at noon
Chapter 46 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 46 - A typical room air-conditioning unit has _____(one...Ch. 46 - Prob. 2RQCh. 46 - The line that carries refrigerant into the...Ch. 46 - Prob. 4RQCh. 46 - Prob. 5RQCh. 46 - Prob. 6RQCh. 46 - Prob. 7RQCh. 46 - Prob. 8RQCh. 46 - Prob. 9RQCh. 46 - Prob. 10RQ
Ch. 46 - Prob. 11RQCh. 46 - Prob. 12RQCh. 46 - Describe the operation of the exhaust and...Ch. 46 - Why should gauges be installed only after there is...Ch. 46 - Prob. 15RQCh. 46 - Prob. 16RQCh. 46 - During the heat pump heating cycle, the hot gas...Ch. 46 - What are two methods used to evaporate condensate...
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- A pneumatic power system will usually have a return line a. True b. Falsearrow_forwardSelect the proper choice(s) for each of the following statements: 1) To control single-acting cylinder we just need: double-acting cylinder we should use A2/2-way, 5/2-way, (C) 3/3-way, 3/4-way, 2) In DCV. (B) 3/2-way, 4/2-way, (D) 4/3-way, 3/2-way. mid poistion of DCV, we can move cylinder piston rod freely without resistance by hand. (A) working ports are exhausted, (C) working ports are pressurized, 3) In pneumatics we use A Compressor (B) Pump, DCV, while to control the 4) Quick exhaust valve is used to (A) increase the cylinder return speed. (C) meter-out the cylinder speed (B) all ports are closed. no one of these options. to obtain high pressure air. (C) Turbine, (D) pressure relief valve. (B) meter-in the cylinder speed, (D) increase the cylinder extending speed. 6) Meter-in of cylinder movement is used to control the Afluid that enters the hydraulic cylinder, (B) fluid that exits the hydraulic cylinder, (C) fluid that enters the DCV (D) fluid that exits the DCV. 5) One of the…arrow_forwardQuestion1. If an air conditioning system has three independent zones, how many space thermostats will the system have? Question 2. A technician is traversing a duct and obtains the following 8 velocity: 500fpm, 400fpm, 375fpm,625fpm,275fpm,360fpm,450fpm,and 575fpm. What is the velocity value that can be used for the system calculations?arrow_forward
- to run d. both a and b 44. Ifa thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, whích of the following could result? The bulb pressure would increase and the c. thermostatic expansion valve would open. b. The superheat in the evaporator would decrease. a. Liquid refrigerant would flow back to the compressor. d. All of the above are correct. 45. If the thermal bulb assembly develops a leak, what will occur? All of the system's refrigerant will leak a. The valve will open to allow more c. refrigerant to flow. d. It will have no effect on system operation. out. b. The bulb pressure will reduce and the valve will close. 46. The purpose of an externally equalized thermostatic expansion valve is to compensate for excessive evaporator pressure drop b. allow system to equalize faster a. prevent the expansion valve from frosting up d. c. allow refrigerant to expand in the compressor 47. The primary function of an expansion device is…arrow_forwardThe colors of the wires of the thermocouple type K are: Select one: a. Green and white. b. Black and white. c. Green and black. d. Brown and white.arrow_forwardElectrical shorts are commonly caused by Select one: a. Wire movement b. heat melting the insulation c. Accident d. allarrow_forward
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