Presence of soluble organics in polluted water causes Depletion of oxygen Fire hazards Explosion hazards Undesirable plants growth TRUE ANSWER : ? YOUR ANSWER : ?
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as Peroxy acetyl nitrate (PAN) or methyl nitrile Poly acrylonitrile Photochemical smog Benzopyrene TRUE ANSWER : ? YOUR ANSWER : ?
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because It forms CO₂ by combining with oxygen present in the blood Of jamming of respiratory tract Of clotting of blood It forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen TRUE ANSWER : ? YOUR ANSWER : ?
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries? Natural organic products Inorganic pollutants Radioactive substances None of these TRUE ANSWER : ? YOUR ANSWER : ?
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water. All of these Vapor pressure Biological oxygen demand Dissolved oxygen content TRUE ANSWER : ? YOUR ANSWER : ?
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes All of these Nervous depression Paralysis of muscles & loss of appetite Gastritis & diarrhea TRUE ANSWER : ? YOUR ANSWER : ?
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur. 3000 (i.e. 0.3%) 500 1000 50 TRUE ANSWER : ? YOUR ANSWER : ?
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is Neutralised by alkali treatment Diluted with fresh water to reduce its acidity Left as such without any treatment None of these TRUE ANSWER : ? YOUR ANSWER : ?
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. 100 30 70 3 TRUE ANSWER : ? YOUR ANSWER : ?
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c. 1 82 19 7 TRUE ANSWER : ? YOUR ANSWER : ?