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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MCQs: Persons working in cement plants and limestone quarries are more prone to disease like__________________?
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MCQs: Presence of soluble organics in polluted water causes_________________?
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MCQs: Presence of iron and manganese in water causes___________________?
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MCQs: TLV of mercury in potable (drinking) water is about ______________ ppm?
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MCQs: Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?
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MCQs: Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent___________________?
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MCQs: Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?
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MCQs: Foul odour and bad taste of water is removed by treating with__________________?
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MCQs: World environment day is observed every year on the 5th of___________________?
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MCQs: Smoke is produced due to__________________?
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MCQs: Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?
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MCQs: Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for___________________?
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MCQs: The widest explosive limit is of _____________, thereby making it the most explosive gas?
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