What are the methods of treatment & disposal of radioactive wastes? Evaporation & chemical precipitation Biological methods & adsorption in ion exchange materials All of these Fixing into a solid mass with cement and sinking deep in the sea 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 None of these Neutralised by alkali treatment Diluted with fresh water to reduce its acidity Left as such without any treatment TRUE ANSWER : ? YOUR ANSWER : ?
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km. 1 0.05 15 6.5 TRUE ANSWER : ? YOUR ANSWER : ?
In water treatment plant, zeolite process is used to remove the __________ of water. Acidity Alkalinity Iron & zinc Hardness TRUE ANSWER : ? YOUR ANSWER : ?
World environment day is observed every year on the 5th of June July December September TRUE ANSWER : ? YOUR ANSWER : ?
Industrial workers working in leather tanning & manufacturing units are prone to suffer from Skin diseases (e.g. dermatities) Silicosis Blurred vision Respirtory ailments (e.g. bronchitis) TRUE ANSWER : ? YOUR ANSWER : ?
TLV of mercury in potable (drinking) water is about __________ ppm. 5 1 0.001 0.1 TRUE ANSWER : ? YOUR ANSWER : ?
Reinglemann chart is used for the measurement of the Exhaust gas density Smoke density from a chimey Flue gas temperature Combustibles present in automobile exhaust TRUE ANSWER : ? YOUR ANSWER : ?
Global warming may result in Flood Cyclone All of these Decrease in food productivity TRUE ANSWER : ? YOUR ANSWER : ?
Radioactive substances present in the polluted water stream can be removed by Coagulation and filtration None of these Biological oxygen treatment Adsorption in ion exchange materials TRUE ANSWER : ? YOUR ANSWER : ?