Air Pollution

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unzbq2010

Engineering

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class : Air Pollution

air pollution control engineering noel de Nevers third edition ( blue book )

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HW 0 Pre-Course

1 True or False

T F

Temperature usually increases with altitude in the troposphere (the lowest level of the

atmosphere).

T F

Because oxygen (O2

) and nitrogen (N2

) constitute roughly 20% and 80% of our atmosphere,

respectively, an “effective molecular weight” is roughly 29.

T F At 0 C and 1 atm, one gram-mole of an ideal gas occupies approximately 24.2 liters.

T F Air is more dense at low relative humidity. Assume pressure and temperature are constant.

T F Helium is the third most common component of air.

T F In common usage, a westerly wind is one that travels toward the west (i.e., from UMKC to KU)

T F The Coriolis effect is most pronounced at the equator.

T F An acute effect occurs over a short time period.

T F Carbon dioxide is a “criteria pollutant” because it involves climate change.

T F

There are “diminishing returns” in air pollution control, meaning that controlling the first few

tons of a source’s emissions may cost much less than controlling nest few hundred pounds

from the source.

T F The viscosity of air decreases with temperature.

T F

One thousand 1-micron particles have more surface area than a single 10-micron particle.

(Assume all are spherical)

T F President Kennedy established the Environmental Protection Agency/

T F States are primarily responsible for attaining national ambient air quality standards

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HW 0 Pre-Course 1 True or False T F Temperature usually increases with altitude in the troposphere (the lowest level of the atmosphere). T F Because oxygen (O​2​) and nitrogen (N​2​) constitute roughly 20% and 80% of our atmosphere, respectively, an “effective molecular weight” is roughly 29. T F At 0 C and 1 atm, one gram-mole of an ideal gas occupies approximately 24.2 liters. T F Air is more dense at low relative humidity. Assume pressure and temperature are constant. T F Helium is the third most common component of air. T F In common usage, a westerly wind is one that travels toward the west (i.e., from UMKC to KU) T F The Coriolis effect is most pronounced at the equator. T F An acute effect occurs over a short time period. T F Carbon dioxide is a “criteria pollutant” because it involves climate change. T F There are “diminishing returns” in air pollution control, meaning that controlling the first few tons of a source’s emissions may cost much less than controlling nest few hundred pounds from the source. T F The viscosity of air decreases with temperature. T F One thousand 1-micron particles have more surface area than a single 10-micron particle. (Assume all are spherical) T F President Kennedy established the Environmental Protection Agency/ T F States are primarily responsible for attaining national ambient air quality standards 2 Briefly explain how (a) a pitot tube and (b) a rotameter work. 3 The 1-hr National Ambient Air Quality Standard for carbon monoxide is about 40 mg per cubic meter of air. How many gram-moles is 40 mg of CO? What volume would 40 mg of CO occupy at 77 F and 14.7 psia? Use that volume by 1 cubic meter to approximate a CO concentration of 40 mg/m​3​ in percent and parts per million. 4 Name at least 5 commonly used units of pressure. 5 If you took ME 451, how many particulate matter emission sources can you think of that would be present at a coal-fired power plant? If you didn’t take ME 451, take a guess as well. 6 Consider the complete combustion of propane (C​3​H​8​) to obtain CO​2​ and H​2​O. Write and balance the chemical equation. How much air do you need to completely combust 20 lb of propane? How much would the air weigh? Assume
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