Chemical Environmental Engineering MCQs

141 MCQs  — Chemical Engineering MCQs  (Page 7 of 15)

Attempt Chemical Environmental Engineering Quiz
Which of the following is the most lethal water pollutant ?
A. Phenol and cyanide
B. Chlorine
C. Alkalis
D. Suspended solids
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The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?
A. Dissolved oxygen content
B. Biological oxygen demand
C. Vapor pressure
D. All a., b. and c.
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Which of the following industries discharge mercury as a pollutant ?
A. Chloro-alkali industry
B. Tanneries
C. Beverage plant
D. Phosphoric acid plant
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The Killer gas which caused Bhopal gas tragedy in 1984 was________________?
A. Phosgene
B. Methyl isocyanate (mic)
C. Carbon monoxide
D. Sulphur dioxide
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Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?
A. Highly
B. Moderately
C. Extremely
D. Very extremely
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The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?
A. Mercury
B. Brine
C. Phosphate
D. None of these
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Deaeration of high pressure boiler feed water is done to reduce ___________________?
A. Foaming from boilers
B. Its dissolved oxygen content
C. Its silica content
D. Caustic embrittlement
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Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?
A. I-131
B. Sr-90
C. Au-198
D. Ra-226
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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
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Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?
A. Moderately
B. Highly
C. Extremely
D. Very extremely
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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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