quiz lesson 6

For incandescent light 052 x 10

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Unformatted text preview: D ) all of the above Light bulb labels should contain light output, energy used and life of the bulb The high- pressure sodium (HPS) lamp is widely used for what purpose? Correct A ) Outdoor and industrial applications HPS lamp is widely used for outdoor and industrial applications A 60 watt incandescent light bulb is operated for 10 hours, and a 15 watt fluorescent light bulb is operated for the same period of time. At 10 cents per kWh, what is the cost savings in using the fluorescent bulb? Correct C ) 0.04 Incandescent light bulb Energy consumed = 60/1000 x 10 = 0.6 kWh Energy Cost = 0.6 x 10/100 = $0.06 Fluorescent light bulb Energy consumed = 15/1000 x 10 = 0.15 kWh Energy Cost = 0.15 x 10/100 = $0.015 Savings in Energy Cost = 0.06- 0.015 = $0.045 Fluorescent bulbs ultimately give out UV light. Correct B ) FALSE Which of the following kind of bulb requires a ballast? Correct B ) fluorescent Fluorescent bulb requires a ballast What kind of information does a life- cycle cost (LCC) analysis provide? Correct A ) Total cost of a lighting system- including all expenses incurred over the life of the system Lifecycle cost analysis provides total cost of a lighting system- including all expenses incurred over the life of the system Efficacy of lighting is measured by _____. Correct C ) Lumens per Watt Efficacy of lighting is measured by lumens per watt A 27 watt compact fluorescent lamp (CFL) produces 1531 lumens of light. What is the efficacy of the CFL (in lumens/watt)? Correct A ) 56.7 lumens/watt Efficacy = 1531/27 = 56.703 lumens/watt CFL lights operate at the same voltage as standard incandescent lights. Correct A ) TRUE CFL lights operate at the same voltage as standard incandescent lights A footcandle (fc) is calculated as _____. Correct A ) fc = Lumens of Light / Area in sq. ft Which one of the following light bulbs produces highest lumens per watt? Correct D ) Low pressure sodium Low pressure sodium light bulbs produce highest lumens per watt A higher CRI means _____. C...
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