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 23RQ
What basic concept is used in a digital meter to calculate the circuit characteristics being measured?
- a. Watt’s law
- b. Volt’s law
- c. Amp’s law
- d. Ohm’s law
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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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- MULTIPLE CHOICE -The answer is one of the options below please solve carefully and circle the correct option Please write clear .arrow_forwardwhats a multimeterarrow_forwardWhich statement is true in the case of the term "Precision". The closeness of output readings when the same input is applied repetitively over a short period of time when there is change in condition of measurement. The closeness of output readings when the same input is applied repetitively over a short period of time when there is change in time of measurement. The closeness of output readings when the same input is applied repetitively over a short period of time when there is change in location. The closeness of output readings when the same input is applied repetitively over a short period of time and there is no change in observer.arrow_forward
- One of the major components of a residential electronic control circuit that measures temperature is a A. thermometer. B. thermistor. C. capacitor. D. filter.arrow_forwardWhat does "calibrating an instrument" mean?arrow_forwardThe sensitivity of a potentiometer depends on its actual supply voltage. True Falsearrow_forward
- Identify and discuss the function of each part: Hand Speed Tachometer Revolution Counter Tachoscope Centrifugal Force Tachometerarrow_forwardFrom the speed chart below, determine the correct cutting speed for facing an Aluminum part on a milling machine using a 1 in. diameter square-nose end-mill Surface Speed (Ft/Min) Aluminum Brass/Bronze Low Carbon Steel Cast Iron Alloy Steel 400 300 200 100 80 70 60 50 40 Diameter (in) N WAGO 10 0.8 0.4 0.3 0.2 0.1 Cutting Speed (RPM) I 10 20 30 40 50 60 70 80 100 200 300 400 500 600 700 800 1000 2000 3000 4000 5000 6000 7000 8000 10000arrow_forwardWhich statement is true in the case of the term "Range". The minimum and maximum values the instrument is designed to measure Is closely related to accuracy and output reading of an instrument is linearly proportional to the quantity being measured. Is not related to accuracy and define the maximum error of the measuring instrument during measurement process. Is closely related to accuracy and define the minimum and maximum values an instrument is designed to measure.arrow_forward
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