Chemical Engineering MCQs

Page No. 60

The maximum CO2 is emitted into the atmosphere by_________________?


aCombustion


bUrea


cBiomass burning


d Trees


View Answer Combustion

Color test of water is done with an instrument called__________________?


aTintometer


bColorimeter


cElectro-chemical cell


d Turbidimeter


View Answer Tintometer

Water filtration rate in a slow sand filter ranges from ____________ litres/m2/hr?


a10 to 20


b100 to 200


c1500 to 2500


d4000 to 5000


View Answer 100 to 200

A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________?


aCesspool


b Lagoon


c Skimming mill


dSeptic tank


View Answer Septic tank

The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?


a60


b 90


c105


d120


View Answer 90

Maximum permissible residual chlorine in treated water should be ____________ mg/litre?


a0.001 to 0.01


b0.2 to 0.32 to 3


c2 to 3


d5 to 10


View Answer 0.2 to 0.3

Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?


aAsphyxiation (suffocation)


bShortness of breath


cTuberculosis


d All A., B. and C.


View Answer All A., B. and C.

In a sedimentation tank, the detention period for water ranges from _____________ hours?


a 2 to 4


b8 to 12


c16 to 20


d 24 to 32


View Answer 2 to 4

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?


a 3


b 30


c 7


d 70


View Answer 3

TLV of lead for public sewer/waste water is about ______________ ppm?


a1


b 25


c150


d650


View Answer 1

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