MCQs: In the context of the chemical process industries, the term BOD is normally associated with the_____________________?
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MCQs: Iron & manganese present as pollutant in water cannot be removed by__________________?
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MCQs: Which is the most practical and economical method for removal of suspended solid matter from polluted water ?
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MCQs: When the concentration of SO2 in air is greater than ______________ ppm, it gives a pungent smell?
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MCQs: Pick out the correct statement ?
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MCQs: Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
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MCQs: Which of the following pollutants, if present in atmosphere is detectable by its odour ?
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MCQs: Removal of ______________ is accomplished by aeration of water?
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MCQs: Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal ?
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MCQs: Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?
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MCQs: Inhalation of silica dust causes a disease called__________________?
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MCQs: Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?
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MCQs: A shallow pond in which the sewage is retained and biologically treated is called__________________?
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MCQs: Main pollutants released from iron & steel industry is__________________?
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MCQs: Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan_________________?
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MCQs: The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is_________________?
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MCQs: Dust collection efficiency of a cyclone separator depends upon its______________?
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MCQs: Which of the following is the most severe air pollutant ?
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MCQs: 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 ?
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MCQs: The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?
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