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Which of the following lighting systems is affected the least by a 10 percent reduction in voltage?
❎ Mercury lamps
❎ Incandescent lighting systems
⭕️ Fluorescent lighting systems
❎ High-intensity discharge lamps
❎ Low-intensity discharge lamps
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The manner in which an oil flows is known as its:
❎ atomization
❎ flash point
⭕️ viscosity
❎ pour point
❎ heating value
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In incandescent lamps:
⭕️ higher temperature is correlated with shorter life
❎ higher temperature is correlated with lower efficacy
❎ lower temperature is correlated with shorter life
❎ lower temperature is correlated with higher efficacy
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Which of the following variables is NOT considered in the calculation of a light loss factor?
❎ Depreciation of lamp lumen due to the buildup of dirt
❎ Rate at which lamps burn out
⭕️ Loss of lamps due to breakage
❎ Depreciation of the lamp lumen over time
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The seasonal efficiency of natural gas heating equipment is:
⭕️ about the same as the seasonal efficiency of oil heating equipment
❎ less than the seasonal efficiency of oil heating equipment
❎ greater than the seasonal efficiency of oil heating equipment
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With regard to a lighting system, what is the term for the quantity of visible light produced per quantity of power expended?
❎ Color temperature
⭕️ Efficacy
❎ Luminous intensity
❎ Color rendering
❎ Illuminance
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In which method of liquefaction is heat used to drive off the unstable elements of coal?
❎ Indirect liquefaction
⭕️ Pyrolysis
❎ Direct liquefaction
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Which wall of a building is the most important to insulate during the winter?
❎ South
⭕️ North
❎ West
❎ East
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When a utility company assigns a minimum power demand charge equal to 70 percent of the highest demand charge incurred by the customer during the past year, this is known as a:
⭕️ proportional charge
❎ variable demand clause
❎ electrical demand charge
❎ power factor discount
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Which of the following devices measures relative humidity?
❎ Suction pyrometer
❎ Barometer
⭕️ Psychrometer
❎ Thermometer
❎ Surface pyrometer
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Which of the following is an advantage of liquid-type solar collectors over air-type collectors?
❎ Liquid-type collectors are not as susceptible to corrosion
❎ Liquid-type collectors are not as susceptible to freezing
⭕️ Liquid-type solar collectors require less fan power
❎ Liquid-type solar collectors are more effective at generating hot air
❎ Leaks are not as severe a problem in liquid-type solar collectors
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For an average home, the standard number of air changes per hour is:
❎ 0.55
⭕️ 0.35
❎ 0.75
❎ 0.25
❎ 0.1
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Which of the following is a good strategy for conserving energy in an induction HVAC system?
⭕️ Decrease secondary water temperatures during the heating season
❎ Install static pressure controls
❎ Decrease the hot deck temperature and increase the cold deck temperature
❎ Install fan inlet damper control systems
❎ Set airflow to the minimum necessary levels
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Which type of steam trap is the most susceptible to wear?
❎ Float and thermostatic steam trap
⭕️ Disk steam trap
❎ Bellows thermostatic steam trap
❎ Inverted bucket steam trap
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In an Orsat apparatus, the gas remaining after the introduction of flue gas is assumed to be:
❎ carbon monoxide
❎ cuprous chloride
❎ potassium hydroxide
⭕️ nitrogen
❎ carbon dioxide
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