Chemical Engineering MCQs

Page No. 55

High noise level in a chemical plant can be controlled by the_________________?


a Suppression of noise at the source itself


bPath control of noise


cProtection of operating personnel


dAll A., B. & C.


View Answer All A., B. & C.

World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?


aArizona (U.S.A.)


bChernobyl (undivided U.S.S.R.)


c Pennsylvania (U.S.A.)


dMoscow (U.S.S.R.)



Exposure to chemicals having carcinogenic properties cause ____________________?


a Dermatitis (skin disorder)


b Cancer


cAsphyxiation (suffocation)


dAsthma


View Answer Cancer

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?


a35


b75


c 95


d105


View Answer 75

COD of raw municipal sewage may be in the range of about _____________ mg/litre?


a 1-2


b5-10


c90-120


d1500-2500


View Answer 90-120

‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?


aCoal


bUranium ore


cIron ore


dLime


View Answer Coal

A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?


a1000 to 2000


b3000 to 6000


c6000 to 9000


d10000 to 100000


View Answer 10000 to 100000

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about ______________ decibels?


a75


b95


c120


d140


View Answer 95

Main pollutant present in automobile exhaust is_________________?


aCO


bCO2


cNO


dHydrocarbons


View Answer CO

Scale formation in boiler is controlled by____________________?


aPreheating of feed water


bReduction in hardness, silica & alumina in feed water


c Keeping the pH value of feed water just below 7


dEliminating H2S in feed water



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