Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 1RQ
What are the three most common electric meters used in the industry?
Expert Solution & Answer
To determine
The type of three most commonly used electric meters in the industry.
Explanation of Solution
An electric meter is a device utilized to measure various electrical variables or characteristics of a circuit. The most commonly used electric meters are listed below:
- Ammeter –– Used to measure the current flowing in an electric circuit. There are two types of ammeters.
- Voltmeter –– Used to measure the potential difference between two specific points in a circuit.
- Ohmmeter –– Used to measure the resistance of the component associated in a circuit.
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A freight elevator, including its load, has a mass of 1 Mg. It is prevented from rotating due to the track and wheels mounted along its sides. The motor M develops a constant tension T= 4.1 kN in its attached cable. Neglect the mass of the pulleys and cables.
Write out the equations of motion for the elevator, and solve for the acceleration.
Then apply the constant acceleration equations to solve for the velocity when the elevator has moved 4 m upward from rest.
A freight elevator, including its load, has a mass of 1 Mg. It is prevented from rotating due to the track and wheels mounted along its sides. The motor M develops a constant tension T= 4.1 kN in its attached cable. Neglect the mass of the pulleys and cables.
Write out the equations of motion for the elevator, and solve for the acceleration.
Then apply the constant acceleration equations to solve for the velocity when the elevator has moved 4 m upward from rest.
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Scored
The impeller of a centrifugal pump has inner and outer diameters of 15 cm and
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outlet. If water enters the impeller in the radial direction and exits at an angle
of 60° from the radial direction, determine the minimum power requirement for
the pump. Take the density of water to be 1000 kg/m³
The minimum power requirement for the pump is 95.51 kW.
Chapter 4 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 4 - What are the three most common electric meters...Ch. 4 - Prob. 2RQCh. 4 - What do most analog meters use to facilitate the...Ch. 4 - How does an ammeter work?Ch. 4 - What are the two types of ammeters? Which type is...Ch. 4 - Prob. 6RQCh. 4 - How can a very small ampere draw be measured with...Ch. 4 - If a conductor was wrapped around the jaws of a...Ch. 4 - Explain the operation of an analog voltmeter.Ch. 4 - Air-conditioning or refrigeration equipment can...
Ch. 4 - Prob. 11RQCh. 4 - What precaution should be taken when using an...Ch. 4 - Prob. 13RQCh. 4 - What is a short circuit?Ch. 4 - Prob. 15RQCh. 4 - What factors should be considered when purchasing...Ch. 4 - Match the following terms.Ch. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - An in-line ammeter must be connected to a circuit...Ch. 4 - What is the difference between an analog meter...Ch. 4 - Give three advantages of a digital electric meter.Ch. 4 - What basic concept is used in a digital meter to...Ch. 4 - What is the basic accuracy of most analog and...Ch. 4 - How many digits will the 312- and 412-digit...Ch. 4 - Prob. 26RQCh. 4 - The ohmmeter differs from other types of meters in...Ch. 4 - Compare the digital and analog types of electric...
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