Chemical Engineering MCQs

6108 MCQs  (Page 606 of 611)

Attempt Chemical Engineering Quiz
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?
A. Forestation
B. Rain
C. Green house effect
D. Vegetation
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Which of the following sources is responsible for maximum air pollution ?
A. Industrial chimney exhaust
B. Forest fire
C. Automobiles exhaust
D. Photochemical oxidation of organic matter
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Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?
A. 0.1 to 1
B. 3 to 6
C. 10 to 15
D. 15 to 20
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Which of the following pollutants is absent in the emissions from a fertiliser plant ?
A. So2 & so3
B. No2
C. Nh3
D. Co
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The biological decomposition of organic substances in wastes controlled conditions is called_________________?
A. Incineration
B. Biological oxidation
C. Composting
D. None of these
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During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?
A. Filtration
B. Digestion
C. Sedimentation
D. Both b. and c.
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Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?
A. Quenching of hot coke
B. Discharging in the river stream
C. Filtration and recycling for cooling coke oven gas
D. None of these
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Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes_________________?
A. Paralysis of muscles & loss of appetite
B. Nervous depression
C. Gastritis and diarrhea
D. All a., b. and c.
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Insufficient washing of sand grains in a rapid sand filter causes__________________?
A. Air binding
B. Shrinkage of filtering media
C. Mud balls
D. Expansion of filtering media
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In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?
A. 1 to 2
B. 4 to 5
C. 9 to 10
D. 15 to 20
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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