Chemical Engineering — Test 174
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Question 1
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?
Question 2
Fresh sewage is ______________ in nature?
Question 3
______________ is the process of killing organism in water ?
Question 4
Salt content in sea water is about ______________ percent?
Question 5
High noise levels produced during operation of fans and compressors can be reduced by using__________________?
Question 6
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 ?
Question 7
Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?
Question 8
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?
Question 9
Which of the following is not a practical method of low level radioactive waste disposal ?
Question 10
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?