Chemical Environmental Engineering MCQs

141 MCQs  — Chemical Engineering MCQs  (Page 8 of 15)

Attempt Chemical Environmental Engineering Quiz
Carbonaceous particles having size less than 1 μm are called___________________?
A. Grit
B. Aggregates
C. Aerosols
D. Smoke
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White smoke coming out of the chimney of a furnace indicates the use of_________________?
A. Low excess air
B. Very high excess air
C. Gaseous fuel in the furnace
D. Liquid fuel in the furnace
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Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?
A. Gravity settling chamber
B. Cyclone separator
C. Electrostatic precipitator
D. Bag filter
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Pick out the wrong statement pertaining to ‘green house’ for the plants ?
A. ‘green house’ (made of glass) allows sunlight (i.e., short wavelength solar radiation
LikE ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants
InsIde it
B. The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed
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In the context of the chemical process industries, the term BOD is normally associated with the_____________________?
A. Characterisation of solid wastes
B. Organic concentration in gaseous effluents
C. Characterisation of liquid effluents
D. Characterisation of boiler feed water
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Iron & manganese present as pollutant in water cannot be removed by__________________?
A. Ion exchange process
B. Oxidation followed by settling & filtration
C. Lime soda process or manganese zeolite process
D. Chlorination
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Which is the most practical and economical method for removal of suspended solid matter from polluted water ?
A. Sedimentation
B. Skimming off
C. Chlorination
D. Biological oxidation
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When the concentration of SO2 in air is greater than ______________ ppm, it gives a pungent smell?
A. 0.01
B. 0.1
C. 1
D. 4
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Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
A. Lagooning
B. Activated carbon adsorption
C. Biological oxidation pond
D. Chemical coagulation
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Which of the following pollutants, if present in atmosphere is detectable by its odour ?
A. Co
B. So2
C. No2
D. Co2
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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