Which of the following is not a practical method of low level radioactive waste disposal? Dilution with inert material Discharging to atmosphere through tall stacks after dilution Filling in steel crates and shooting it off out of earth Disposing off in rivers & oceans TRUE ANSWER : ? YOUR ANSWER : ?
Soluble silica present in boiler feed water can be removed by Anion exchanger Coagulation Preheating it Filtration TRUE ANSWER : ? YOUR ANSWER : ?
Iron & manganese present as pollutant in water can not be removed by Chlorination Ion exchange process Lime soda process or manganese zeolite process Oxidation followed by settling & filtration TRUE ANSWER : ? YOUR ANSWER : ?
Algae growth in water is controlled by Deoxidation Aeration Bleaching Chlorination TRUE ANSWER : ? YOUR ANSWER : ?
The common pollutant generated in chlor-alkali industry and battery manufacture is None of these Brine Mercury Phosphate TRUE ANSWER : ? YOUR ANSWER : ?
BOD of raw municipal sewage may be in the range of about __________ mg/litre. 2000-3000 1-2 5-10 150-300 TRUE ANSWER : ? YOUR ANSWER : ?
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. 10000 to 100000 3000 to 6000 1000 to 2000 6000 to 9000 TRUE ANSWER : ? YOUR ANSWER : ?
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of Ultraviolet light for irradiation of water Chlorine or its compounds Ozone and iodine All of these TRUE ANSWER : ? YOUR ANSWER : ?
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm. 1000 2000 100 5 TRUE ANSWER : ? YOUR ANSWER : ?
In a sedimentation tank, the detention period for water ranges from __________ hours. 24 to 32 8 to 12 2 to 4 16 to 20 TRUE ANSWER : ? YOUR ANSWER : ?