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.Management Sciences
Category: Chemical Environmental Engineering
Foul odour and bad taste of water is removed by treating with__________________?
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A. Alum
B. Bleaching powder
C. Activated carbon
D. Copper sulphate
The biological decomposition of organic substances in wastes controlled conditions is called_________________?
A. Incineration
B. Biological oxidation
C. Composting
D. None of these
Dust collection efficiency of a cyclone separator depends upon its______________?
A. Diameter
B. Inlet gas velocity
C. Overall height
D. All A., B. & C.
______________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant ?
A. Calcium
B. Fluorine
C. Phosphorous
D. Sulphur
World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?
A. Arizona (U.S.A.)
B. Chernobyl (undivided U.S.S.R.)
C. Pennsylvania (U.S.A.)
D. Moscow (U.S.S.R.)
‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?
A. Coal
B. Uranium ore
C. Iron ore
D. Lime
Noise pollution level in a chemical plant is expressed in __________________?
A. Roentgen
B. Decibel
C. Hertz
D. None of these
The term Biological Oxygen Demand (BOD) is used in relation to ______________________?
A. Potable water
B. Cooling water
C. Distilled water
D. Industrial effluents
The resistance of water to the passage of light through it is a measure of the___________________?
A. Turbidity
B. Color
C. Hardness
D. Dissolved gases
White smoke coming out of the chimney of a furnace indicates the use of_________________?
A. Low excess air
B. Very high excess air
C. Gaseous fuel in the furnace
D. Liquid fuel in the furnace
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