Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Textbook Question
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_forwardTrue or False? A lab scope is a visual voltmeter that shows voltage over a period of time.arrow_forward
- Which of the following statements about oil gauge circuits is not true? A switch can be used A thermistor can be used. A piezoresistive sensor can be used d An oil pressure gauge may not show actual oil pressure.arrow_forwardTrue or False? A zero reading on an ohmmeter means the circuit or component is open.arrow_forwardHow often should cables, control wiring, and hoses be inspected?arrow_forward
- From the following identify the true statement relating to the term Preventive maintenance The maintenance done after the failure of machine and can't save energy during the process. O The maintenance done before the failure of machine and can save energy during the process. O The maintenance done before the failure of machine and can't save energy during the process. The maintenance done after the failure of machine and can save energy during the process.arrow_forwardWhich of the following is not a component of a pneumatic system? Group of answer choices An electric motor A pump None of these are true A valve An actuatorarrow_forwardThe pressure measured below the atmospheric pressure is called as ____________ Vacuum Pressure Differential Pressure Atmospheric Pressure Gauge Pressurearrow_forward
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