Chemical Engineering MCQs

Page No. 45

Ringelmann chart No. 2 corresponds to _______________ percent black smoke?


a10


b20


c40


d80


View Answer 40

Global warming may result in __________________?


aFlood


bCyclone


cDecrease in food productivity


dAll A., B. and C.


View Answer All A., B. and C.

Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?


aOzone and iodine


b Chlorine or its compounds


cUltraviolet light for irradiation of water


dAll A., B. & C.


View Answer All A., B. & C.

Which of the following is not a practical method of low level radioactive waste disposal ?


aDilution with inert material


bDischarging to atmosphere through tall stacks after dilution


cDisposing off in rivers & oceans


d Filling in steel crates and shooting it off out of earth’s gravity



The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?


aCatalytic conversion


bGreen house effect


cGlobal warming


dBoth B. and C.


View Answer Both B. and C.

Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?


aActive carbon


b Silica gel


cBog iron (iron oxide)


dPulverised limestone


View Answer Silica gel

Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?


aCO2


bH2


cSO3


dN2


View Answer SO3

High noise levels produced during operation of fans and compressors can be reduced by using__________________?


a Mufflers (silencers)


bAcoustic absorbent


cLagging of noisy duct


dNone of these



Pick out the wrong statement?


aAll the nitrogenous fertilisers are not soluble in water


bA straight fertiliser contains only one nutrient


cCalcium cyanamide is used as weed killer in onion fields


dThe phosphorous nutrient makes the plant stem stronger and increases its branches



Removal of ______________ results from the disinfection of water?


aTurbidity


bOdour


cHardness


dBacteria


View Answer Bacteria

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