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30 1. Air and ater Pollution W

10. Water pollution sources are divided into
(a) diffuse and ducted sources
(b) point and nonpoint sources
(c) mobile and stationary sources
(d) point and dif fuse sources
11. The main source of air pollution is
(a) road transport
(b) metal industry
(c) ref ineries
(d) road transport and combustion installations
12. Among industries, the metal industry is the main sour ce of
(a) carbon monoxide
(b) carbon dioxide
(c) CFCs
(d) NO x
13. The main sources of water pollutants ar e
(a) combustion installations and metal industry
(b) agriculture and combustion installations
(c) agriculture, metal industry and basic inorganic chemicals industry ,
(d) metal industry and combustion installations
14. Acidification is a pr oblem
(a) that afgions up to 100 km fects re
(b) that may appear on both regional and transboundary le v els
(c) faced all oer the w v orld
(d) of specific areas

ANSWERS TO MULTIPLE CHOICE QUESTIONS

1. (d) both ozone depletion and greenhouse ef fect
2. (d) all of the abo e v
3. (a) greenhouse effect and ozone depletion
4. (a) primary pollutants are generally easier to treat
5. (c) both of the abo e v
6. (a) photochemical smog and winter-type smog
7. (d) energy sector
8. (b) cause eutrophication
9. (a) agriculture
10. (b) point and nonpoint sources
11. (d) road transport and combustion installations
12. (a) carbon monoxide
13. (c) agriculture, metal industry and basic inorganic chemicals industry ,
14. (b) that may appear on both regional and transboundary le els v