Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 4, Problem 16RQ
What factors should be considered when purchasing an electric meter?
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Chapter 4 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning
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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- Before installing a gauge on the high-pressure side of a system, you should do which of the following? A. Turn on the system. B. Turn off the system. C. Adjust the system to a neutral position. D. Have a cylinder approved by the DOT nearby.arrow_forwardWhy should gauges be installed only after there is evidence that they are needed?arrow_forwardWhy would a technician use an electronic charging scale?arrow_forward
- List the four ways that individual components can be checked.arrow_forwardTrue or False: When troubleshooting a small system, the first step is to attach the high- and low-pressure gauges.arrow_forwardThe following transducer is used to measure the temperature. a. Bourdon tube b. Bellows c. Thermocouple d. Strain Gaugearrow_forward
- True or False? A lab scope is a visual voltmeter that shows voltage over a period of time.arrow_forward2.A. You can usually check for a leak in a vacuum system by looking at or feelingA. at the exhaust of the vacuum pump.B. at the vacuum gauge at the vacuum pump.C. for signs of dirt on the piping. 2.B. When you measure the voltage drop across a set of contacts, you'reA. checking the quality of the contact set.B. sensing how much current is flowing in the circuit.C. measuring the equivalent motor resistance. 2.C. A chain-drive system can be aligned easier than a belt-drive system since the chain-drive systemA. can have a string left on the sprockets after the alignment is complete.B. can have the chain removed while the final alignment is taking place.C. is less critical to misalignment.arrow_forwardWhat is thermocouple gauge used for detection of leaks in vacuum systems.arrow_forward
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