Chemical Environmental Engineering Mcqs
Q.1: Pick out the wrong statement?
A. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration inW
B. exhaust emissions
C. Inhalation of pollutant carbon monoxide results in death by asphyxiationH
D. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles[
Q.2: Pick out the wrong statement ?
A. Biological oxygen demand (O.) value of a sewerage sample is always lower than itsQ
B. chemical oxygen demand (O.) value!
C. Environmental pollution by NOx emission is much higher by four stroke petrol engines asW
D. compared to the two stroke engines"
Q.3: Pick out the wrong statement ?
A. The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in_
B. ozone
C. Mesosphere is characterised by very low atmospheric pressure and low temperatureP
D. Troposphere is a dusty zone containing water vapor and clouds=
Q.4: Pick out the wrong statement?
A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol drivenY
B. automobile exhaust
C. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light]
D. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber treesL
Q.5: Pick out the correct statement?
A. Noise from ball mills can be dealt with by fibre glass lined enclosuresG
B. Noise from vibrating chutes can be reduced by lining the metallic chute with rubberS
C. Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts andZ
D. rubber/plastic covered metallic rollers'
Q.6: Pick out the correct statement ?
A. Deforestation helps in controlling the green house effect9
B. Global warming is detrimental for increase in food productivity and may cause flood andW
C. cyclone
D. Lightening discharges are natural source of production of SO2 & H2S pollutantM
Q.7: Pick out the wrong statement?
A. Biological oxygen demand (BOD) is a characteristic and not a constituent of waterQ
B. BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by theW
C. biological decomposition of the organic matter present in water stream present as food for the^
D. living organism
Q.8: Pick out the wrong statement?
A. A slight haze at the top of chimney indicates good combustion in the furnaceL
B. A bag filter incurs very small pressure drop and is very efficient for removal of submicronic]
C. dust particles from flue gases at very high temperature7
D. Electrostatic precipitator is the most efficient dust collection equipment for removal ofY
Q.9: Pick out the wrong statement ?
A. Low ozone layer thickness in polar regions is due to cold climatic conditionsM
B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared toY
C. that emitted by a four stroke engine$
D. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to[
Q.10: The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?
A. Biological oxygen pond
B. Aerated lagoons
C. Trickling filters
D. Gravity separator having oil skimming devices-

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