Chemical Engineering MCQs

Page No. 54

Peroxyacetyl nitrate (PAN), a pollutant is found in the_________________?


aAutomobile exhaust

✓


b Flue gas of coal based power plant

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c Exhaust of nitric acid plant

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dExhaust of sulphuric acid plant

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View Answer Automobile exhaust

. Operating principle of cyclone separator is based on the action of _______________ dust particles?


aDiffusion of

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bCentrifugal force on

✓


cGravitational force on

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dElectrostatic force on

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View Answer Centrifugal force on

Green house effect is accentuated by________________?


aDeforestation

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bRapid industrialisation

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c Increased transportation activity

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dAll A., B. and C.

✓


View Answer All A., B. and C.

Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause___________________?


aExplosion

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b Non biodegradable foam

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cUndesirable plant growth

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d Corrosion

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View Answer Explosion

The widest explosive limit is of _____________, thereby making it the most explosive gas?


aAcetylene

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bPetrol vapor

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cHydrogen

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dCarbon monoxide

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View Answer Acetylene

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for___________________?


aConversion of CO into CO2 in the second compartment

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b Conversion of NOx into N2 and NH3 in the first compartment

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cOxidation of unburnt hydrocarbon fuel in the second compartment

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dAll A., B. and C.

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View Answer All A., B. and C.

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?


a20

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b 60

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c90

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d120

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View Answer 90

Smoke is produced due to__________________?


a Insufficient supply of combustion air and insufficient time for combustion

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bPoor quality of fuel and improper mixing of fuel & combustion air

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c Poor design & overloading of furnace

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dAll A., B. and C.

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View Answer All A., B. and C.

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?


aNOx

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bHg

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cSO2

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dF

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View Answer SO2

80% less than 200 mesh size particles are called____________________?


aSmoke

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bPowder

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cGrit

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dAggregates

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View Answer Powder

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