EGEE 102 PRACTICE TEST COMPLETE QUESTIONS AND ANSWERS GRADED A PLUS

EGEE 102 PRACTICE TEST COMPLETE
QUESTIONS AND ANSWERS GRADED A
PLUS

●● A footcandle (fc) is calculated as
Answer: fc = lumens of light/area in square feet


●● CFL bulbs operate at _____ temperatures compared to halogen bulb
Answer: much lower


●● Typically, compact flourescent lamps are how many times more
efficient than incandescent lamps?
Answer: 3-4 times more efficient


●● Which one of these methods of lighting is least efficient?


incandescent
flourescent
high-intensity discharge
low pressure sodium
Answer: incandescent

, ●● Which of the following lighting methods is the most energy
efficient?


incandescent
flourescent
high intensity discharge
Answer: high intensity discharge


●● True/False: Incadescent lights operate at the same wattage as
flourescent lights to give out the same amount of light.
Answer: False


●● A 60 watt incandescent light bulb is operated for 10 hours, and a 15
watt flourescent light bulb is operated for the same period of time. At 10
cents per kWh, what is the cost savings of the flourescent bulb?
Answer: $0.04(5)


●● A 100-watt bulb produces 10 watts of radiant energy and 90 watts of
heat energy. What is its efficiency?
Answer: 10%


●● A 100-watt light bulb is left on for 35 hours. How much did it cost to
operate the light bulb if electricity costs 12 cents per kWh?
Answer: $0.42