Chemical Environmental Engineering Mcqs


Q.  Which of the following is the most lethal water pollutant ?

a. Phenol and cyanide
b. Chlorine
c. Alkalis
d. Suspended solids


ANSWER: See Answer
 
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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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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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