Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 1, Problem 3RQ
Which of the following voltages will a refrigeration, heating, and air-conditioning technician come in contact with in the industry?
- a. 24 volts
- b. 120 volts
- c. 240 volts
- d. all of the above
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The two popular operating voltages for residences are_________ V and _________ V.
Dehumidifier is an example of which of the
following?
Closed System
Open System
Isolated System
None of the above
Which of the following systems generate more energy when used in industrial applications?
a.
pneumatic systems
b.
hydraulic systems
c.
none of the listed
d.
both systems generate same energy
Chapter 1 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 1 - True or False: A heating and air-conditioning...Ch. 1 - What is a live electrical circuit?Ch. 1 - Which of the following voltages will a...Ch. 1 - Electrical shock occurs when a person _________....Ch. 1 - What are the important elements of electrical...Ch. 1 - Prob. 6RQCh. 1 - Which of the following is the standard by which...Ch. 1 - Prob. 8RQCh. 1 - What type of ladder should the technician use on...Ch. 1 - What precautions should be taken when you see a...
Ch. 1 - True or False: It is recommended that at least one...Ch. 1 - True or False: The correct fuse size for an...Ch. 1 - What is the difference between a two-prong plug...Ch. 1 - Which prong on a three-prong plug is the ground?...Ch. 1 - True or False: A grounding adapter does no good if...Ch. 1 - An electrical device that will open an electrical...Ch. 1 - True or False: Receptacles used on the job site...Ch. 1 - What precautions should you use when working in an...Ch. 1 - What is the difference between a fuse and a...Ch. 1 - List at least five electrical safety rules that...
Knowledge Booster
Learn more about
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
- An electric kettle is required to raise the temperature of 2 kg of water from 20ºC to 100ºC in 15 minutes. Calculate the resistance of the heating element if the kettle is to be used on a 240 volts supply. Assume the efficiency of the kettle to be 80%.a.72 ohmsc.83 ohms b.62 ohmsd.93 ohmsarrow_forwardWhich of the following would not increase the rate of heat transferred from a heater pipe? A. Insulating with materials whose thickness is below that of critical thickness for insulation. B. Blowing air over it C. Providing fins D. Placing the heater pipe within another whose thermal conductivity is smaller in number and 2 inches thickarrow_forwardto 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_forward
- One ton of refrigeration is A. 1200 Btu. B. 12,000 Btu/h. C. 120,000 Btu. D. 120,000 Btu/h.arrow_forwardSolar refrigeration system is a type of refrigeration you have studied in this course Select one: O a. None of the above b. False c. Not True O d. Truearrow_forwardWhich of the following statements best defines the term evacuation? A process in which the refrigerant in a system is released. A condition that exists when a compressor runs until there is no refrigerant left in the system. The process that pulls all traces of air and moisture from the system. A process that uses air to force moisture and dirt out of the system.arrow_forward
- 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 noonarrow_forwardWhile discussing the reaction by a refrigerant to heat: Technician A says that to absorb heat, the temperature and pressure of the refrigerant are kept low. Technician B says that to dissipate heat, the temperature and pressure are kept high. Who is correct?arrow_forwardWhich of the following should be turned off while working on the compressor circuit? A. The indoor unit fan B. The unit disconnect C. The thermostat D. The main power supply to the buildingarrow_forward
- REFRIGERATION ENGINEERING ACTUAL VCRSarrow_forwardWhat is the total current in a circuit that has two electric heating elements that have resistance of 5 ohm and 20 ohms? The elements are connected in parallel with each other and are connected to a 200 vpower supplyarrow_forwardWhat is the Btu/hour output of an electric heater rated at 15 kilowatts?a. 51.15 Btu/hourb. 51,150 Btu/hourc. 5115 Btu/hourd. none of the abovearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage LearningRefrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Hydronics Step by Step; Author: Taco Comfort Solutions;https://www.youtube.com/watch?v=-XGNl9kppR8;License: Standard Youtube License