Chemical Environmental Engineering Mcqs


Q.  Beyond what concentration of H2S in air, acute danger to human life exists ?

a. 50 ppm
b. 100 ppm
c. 300 ppm
d. 700 ppm


ANSWER: See Answer
 
No explanation is available for this question!
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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MCQs:  Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause___________________?
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MCQs:  Green house effect is accentuated by________________?
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