EMST

Question 1

Air Pollution

Answer 1

Presence in the air of organic and inorganic substances whose quality, concentration and duration affects the usefulness of our air resources.

Question 2

Ambient Standard

Answer 2

Quality standard set for ambient air

Question 3

Emission Standard

Answer 3

Standard set for the sources of wastes

Question 4

Duration

Answer 4

Period at which air pollutants will be present in the atmosphere.

Question 5

Particulates

Answer 5

any substance that exist as solid or liquid in the atmosphere

Question 6

Gases

Answer 6

Molecular in size

Question 7

Dust

Answer 7

solid aerosol in the micron size range (1 micron – 300 microns)

Question 8

Fume

Answer 8

solid aerosol in submicron size range ( 0.001 micron – 1 micron)

Question 9

Mist

Answer 9

a form of liquid aerosol (0.01 – 10 microns)

Question 10

Spray

Answer 10

higher concentration, visible to the human eye ( 10 microns – 3 mm)

Question 11

Smoke

Answer 11

combination of gas and solid particulates from fuel combustion.

Question 12

Fog

Answer 12

high concentration mist sufficient to reduce visibility.

Question 13

Smog

Answer 13

Smoke and fog

Question 14

Carbon monoxide

Answer 14

(CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.

Question 15

Carbon dioxide(chemical formula CO2)

Answer 15

is a naturally-occurring chemical compound composed of 2 oxygen atoms eachcovalently double bonded to a single carbon atom.

Question 16

Sulfur dioxide

Answer 16

is thechemical compoundwith the formulaSO 2. Atstandard atmosphere, it is a toxic gas with a pungent, irritating, and rotten smell.

Question 17

Photochemical smog

Answer 17

is a unique type of airpollution which is caused by reactions between sunlight and pollutants likehydrocarbons and nitrogen dioxide.

Question 18

NO2

Answer 18

is a generic term for the various nitrogen oxides produced during combustion.

Question 19

chlorofluorocarbon (CFC)

Answer 19

is anorganic compound that contains onlycarbon, chlorine, and fluorine, produced as avolatile derivative ofmethane, ethane andpropane.