MCQs: Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?
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MCQs: For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?
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MCQs: Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?
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MCQs: Smog is ______________________?
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MCQs: Noise pollution level in a chemical plant is expressed in __________________?
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MCQs: Which of the following is not a weightless pollutant ?
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MCQs: Noise level in a quiet private business office is about _____________ decibels?
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MCQs: Which of the following fine dust removal equipments is the most efficient ?
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MCQs: Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?
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MCQs: From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?
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MCQs: Fresh sewage is ______________ in nature?
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MCQs: ______________ is the process of killing organism in water ?
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MCQs: Salt content in sea water is about ______________ percent?
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MCQs: High noise levels produced during operation of fans and compressors can be reduced by using__________________?
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MCQs: 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 ?
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MCQs: Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?
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MCQs: The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?
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MCQs: Which of the following is not a practical method of low level radioactive waste disposal ?
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MCQs: 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_________________?
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MCQs: Global warming may result in __________________?
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