Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Question
Chapter 4, Problem 2RQ
To determine
The importance of use of electrical meters for service technicians.
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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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- True or False? A lab scope is a visual voltmeter that shows voltage over a period of time.arrow_forwardThe ________is both the greatest asset and the greatest liability of an electronic leak detector.arrow_forwardWhile measuring resistance: Technician A uses an ohmmeter to measure resistance of a component before disconnecting it from the circuit. Technician B uses a voltmeter to measure voltage drop. A circuit with very low resistance will drop zero or very little voltage. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
- True or False? The same information available in service manuals and bulletins may also be available electronically on DVDs and the Internet.arrow_forwardWhile measuring the resistance of a wire with an ohmmeter: Technician A says that if low resistance is shown on the meter, the wire is shorted. Technician B says that if no resistance is measured, the wire is shorted. Who is correct? Technician A Technician B Both A and B d. Neither A nor Barrow_forwardTrue or False? A zero reading on an ohmmeter means the circuit or component is open.arrow_forward
- True or False? A bad ground can cause an increase in the reference voltage to a sensor.arrow_forwardWhile discussing the comprehensive monitoring system: Technician A says that it tests various input circuits. Technician B says that it tests various output circuits. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A uses a testlight to test circuit protection devices. Technician B uses a voltmeter to test circuit protection devices. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
- Basic electronicsarrow_forwardwhat is throttling calorimeter? own wordsarrow_forwardWhile checking an A/C compressor clutch coil clamping diode with a DMM, the meter shows infinite resistance when the diode is measured in both directions: Technician A says that the diode is open. Technician B says that all diodes should behave this way until a specified voltage is applied to them. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
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