EGEE exam 2
Water heaters are typically set to ______.
120 degrees F
Compact fluorescent lamps are how many times more efficient than incandescent lamps producing an equivalent light output?
3-4 times more
The luminous efficacy of a tungsten lamp is about 12 lumens/watt. What is the efficacy of a fluorescent tube?
50
Acid rain precursors in the US reduce visibility by _____?
60%
How much does 1 gal of water weigh?
8.3 lbs
Water heating bills account for about 14% of the average utility bill. How can you reduce that?
All of the above
The greatest ozone hole is located over:
Antartica cirlce
Buying an expensive energy efficient water heater will most likely save _____ in the long-term.
Both money and energy
Without carbon dioxide in the atmosphere the Earth would be _____.
Cooler
Filaments in fluorescent bulbs are made of tungsten.
False
Fossil fuels are hydrocarbons comprised primarily hydrogen and nitrogen, and some sulfur, carbon, oxygen, and mineral matter.
False
Nitrogen Oxides form only from combustion of nitrogen in the fuels.
False
Once destroyed, stratospheric ozone cannot be re-formed.
False
PM2.5 is a term used for "fine" particles that are larger than or equal to 2.5 um (micro meter) in diameter.
False
A ballast is required for which of the following bulbs?
Fluorescent
The most efficient cloths washer is _____.
Front loading
Ozone is _____ when breathed by humans.
Harmful
In the last century the global temperature has _____.
Increased 1 degree F
The Greenhouse Effect occurs because carbon dioxide absorbs _____.
Infrared Radiation
Water heaters consumer energy _____.
Irrespective of whether we use hot water or not
Tungsten halogen bulbs consume ____ power to produce the same amount of light compared to ordinary incandescent bulbs
Less
The most common measure of light output (or luminous flux) is the ____.
Lumen
The vapors of which element are filled in energy efficient bulbs?
Mercury
Nitric acid is formed when ______?
NO is oxidized in the atmosphere to form No2 and then dissolved in clouds
Which gases contribute to ozone formation at the ground level?
Nitrogen Oxides
Which gases contribute to the acid rain formation?
Nitrogen oxides and Sulfur dioxide
Acid rain damages trees in which of the following manners?
Removes soil nutrients
Sulfuric acid is formed when ______?
SO2 is oxidized in the atmosphere to form SO3 and then dissolved in clouds.
Ozone forms by the reaction of nitrogen oxides and _____.
Sulfur Dioxide
Performing a life-cycle analysis (LCC) gives the ____.
Total cost of a lighting system- including all expenses incurred over the life of the system
Methane and nitrous oxide have what impact on the atmosphere?
Trap heat
CO is a primary pollutant
True
Daylighting typically has a CRI value of 100
True
Greenhouse gases trap the infrared radiation in the atmosphere which is radiated back from the Earth.
True
Horizontal axis (front loading) clothes washer are more efficient compared to top loading models.
True
Nitric oxide (NO) and nitrogen dioxide (NO2) together are represented by NOx.
True
Smog is secondary pollutant cause by the burning of fossil fuels.
True
Some groups of scientist argue that an atmosphere rich in CO2 is good for plants.
True
The US emits the largest amount of CO2 in the world due to the combustion of fossil fuels.
True
Stratospheric ozone layer is good for us because it prevents harmful _______ radiation from reaching the earth
UV
Which of the following countries has the highest carbon dioxide emissions?
United States
Sulfates and nitrates that form in the atmosphere from sulfur dioxide (SO2) and nitrogen oxides (NOx) emissions contribute to _____.
Visibility Reduction
Bottom mounted refrigerators are ______ efficient compared to top mounted refrigerators.
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