Chemical Environmental Engineering Quiz 2
1 / 50
Green house gases blanket/block the infrared radiation from earth?s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?
2 / 50
Hazardous/polluting chemical industries should have an ?exclusion zone? with a green belt and general public access prohibited around it, covering a radius of ______ metres?
3 / 50
Fine grit present in sewage is removed in the ______ during sewage treatment?
4 / 50
Lagooning process is mainly a means of the___________?
5 / 50
Fluorosis (a bone disease) is caused by the presence of high concentration of _____ in atmospheric air?
6 / 50
Foul odour and bad taste of water is removed by treating with___________?
7 / 50
Lagoons used for purification of polluted water________?
8 / 50
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about _________ ppm?
9 / 50
High noise levels produced during operation of fans and compressors can be reduced by using___________?
10 / 50
Iron & manganese present in the polluted water is removed by ___________?
11 / 50
Infective bacteria in water is killed by the ______ process?
12 / 50
In large thermal power stations very fine particulates present in flue gas are removed by_____?
13 / 50
Ionisation potential employed in the industrial electrostatic precipitator is of the order of________?
14 / 50
Global warming may result in ___________?
15 / 50
In troposphere (the weather domain), the temperature ?t? at height ?h? above the spa level in metres is given by (where, temperature at sea level is 15?C and t is in ?C ?
16 / 50
High noise level in a chemical plant can be controlled by the__________?
17 / 50
Exposure to small amount of _______ results in high blood pressure & heart disease in human beings?
18 / 50
Hydrogen ion concentration in distilled water is_____?
19 / 50
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes___________?
20 / 50
Fresh sewage is _______ in nature?
21 / 50
Fresh domestic sewage is ________ in color?
22 / 50
Higher concentration of nitrogen dioxide in atmospheric air causes_____?
23 / 50
Inorganic impurities causing water pollution is ______?
24 / 50
Higher concentration of CO2 in atmosphere_______?
25 / 50
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes__________?
26 / 50
Exposure to chemicals having carcinogenic properties cause_____?
27 / 50
Insufficient washing of sand grains in a rapid sand filter causes___________?
28 / 50
Inhalation of silica dust causes a disease called___________?
29 / 50
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes_________?
30 / 50
In water treatment, alum [Al2(SO4)3] is used for the process of ___________?
31 / 50
Exposure to SO2 containing chimney gases results in the___________?
32 / 50
Limestone powder is injected during pulverised coal burning in boilers to _______ the flue gases?
33 / 50
Exposure to chemicals having carcinogenic properties cause ______?
34 / 50
Main pollutant present in automobile exhaust is__________?
35 / 50
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in_____?
36 / 50
Fluorosis is caused due to the presence of excessive amount of _______ in drinking water?
37 / 50
Growth of _______ is promoted by the presence of manganese in water?
38 / 50
In a sedimentation tank, the detention period for water ranges from ______ hours?
39 / 50
Industrial workers working in leather tanning & manufacturing units are prone to suffer from _____?
40 / 50
Inhalation of silica dust by human being causes _____?
41 / 50
In sewage treatment, the detention period allowed for oxidation ponds ranges from ______ weeks?
42 / 50
For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than _______ ppm?
43 / 50
In sewage treatment, its sedimentation is speeded up by commonly adding___________?
44 / 50
Foaming and priming in boiler operation can be reduced by reduction in _______ in feed water?
45 / 50
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes_____?
46 / 50
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of_________?
47 / 50
Green house effect is accentuated by_________?
48 / 50
In water treatment plant, zeolite process is used to remove the ______ of water?
49 / 50
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes______?
50 / 50
H2S present in gaseous stream can be removed by adsorption on _______?
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