Electrical Wiring Residential
19th Edition
ISBN: 9781337101837
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 21.2, Problem 3R
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P.1. Approximately what percentage of visible light is given off by a 100 W incandescent lamp?A. 30 percentB. 10 percentC. 80 percentD. 50 percentP.2. The ordering code for a large incandescent lamp provides information on theA. lamp power requirement, bulb type and size, and sometimes lamp color.B. lamp power requirement, bulb size and special features, and sometimes filament type.C. lamp voltage, bulb type and size, and sometimes lamp color.D. lamp voltage, bulb size and special features, and sometimes filament type.P.3. Which of the following units is used to measure the chromaticity of a lamp?A. Degrees KelvinB. WattsC. Degrees FahrenheitD. Amperes
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