EGEE exam 2

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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.

more


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