Chemical Engineering MCQs

Page No. 46

A standard test for determination of hardness in water is termed as ______________ test?


a EDTA


bElectometric


cTotal count


dPresumptive


View Answer EDTA

The function of skimming tank in sewage treatment is to remove _____________ substances?


a Dissolved solid


bSuspended solid


cOil & fatty


dGritty & inorganic


View Answer Oil & fatty

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?


aCO2


b SO2


cHydrocarbons


dCFC (chloro fluoro carbon)



Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur ?


aThermosphere


bTroposphere


cStratosphere


d None of these


View Answer Troposphere

Which of the following is a manmade source of air pollution ?


aAutomobile exhaust


bForest fire


cBacterial action in soil and swamp areas


d All A., B. and C.


View Answer Automobile exhaust

Workers working in _______________ industry are most prone to white lung cancer?


aCoal mining


bLimestone mining


cTextile


dAsbestos


View Answer Textile

The weakest sound that can be heard by a person in a quiet environment is equivalent to ____________ decibel ?


a1


b 5


c10


d50


View Answer 1

______________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant ?


aCalcium


bFluorine


c Phosphorous


dSulphur


View Answer Fluorine

Pick out the wrong statement?


aLoamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty


b Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis


cApplication of large excess of Potassic fertiliser in soil increases the valuable carotene in fruits and vegetables


dCereal crops grown on alkaline soil absorb higher amount of fluorides thereby spreading fluorosis



Pick out the wrong statement?


aYellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water


bApatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F, Cl, OH)


cUrea is more hygroscopic than ammonium nitrate


dNitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form



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