Ringelmann chart is used for the evaluation of _____________ pollution?
Ringelmann chart is used for the evaluation of _____________ pollution?
A. Air
B. Water
C. Noise
D. Radioactive
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Which of the following is a secondary air pollutant ?
Which of the following is a secondary air pollutant ?A. Photochemical smog
B. Sulphur dioxide
C. Nitrogen dioxide
D. Dust particlesIndustrial workers working in leather tanning & manufacturing units are prone to suffer from ___________________?
Industrial workers working in leather tanning & manufacturing units are prone to suffer from ___________________?A. Respiratory ailments (e.g. bronchitis)
B. Skin diseases (e.g. dermatitis)
C. Silicosis
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Radioactive solid nuclear wastes are disposed off by _________________?A. High temperature incineration
B. Pathological incineration
C. Pyrolysis
D. Underground burial in concrete containersThe main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?
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
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Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?A. Carbonates
B. Bi-carbonates
C. Iron & manganese
D. ArsenicThe main industrial source of emission of hydrogen sulphide air pollutant is________________?
The main industrial source of emission of hydrogen sulphide air pollutant is________________?A. Petroleum refineries
B. Coal based thermal power plants
C. Pulp and paper plant
D. Metallurgical roasting & smelting plant