If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur. 50 3000 (i.e. 0.3%) 500 1000 TRUE ANSWER : ? YOUR ANSWER : ?
Infective bacteria in water is killed by the __________ process. Disinfection None of these Aeration Sterilisation TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the most major constituents of air pollutants? Oxides of sulphur Oxides of nitrogen Carbon monoxide Hydrogen sulphide TRUE ANSWER : ? YOUR ANSWER : ?
Color test of water is done with an instrument called Tintometer Turbidimeter Colorimeter Electro-chemical cell TRUE ANSWER : ? YOUR ANSWER : ?
Radioactive solid nuclear wastes are disposed off by Pyrolysis High temperature incineration Pathological incineration Underground burial in concrete containers TRUE ANSWER : ? YOUR ANSWER : ?
Removal of __________ results from the disinfection of water. Turbidity Hardness Bacteria Odour TRUE ANSWER : ? YOUR ANSWER : ?
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum? Deaccelaration Cruising Idle running Acceleration TRUE ANSWER : ? YOUR ANSWER : ?
Reinglemann chart is used for the measurement of the Exhaust gas density Combustibles present in automobile exhaust Smoke density from a chimey Flue gas temperature TRUE ANSWER : ? YOUR ANSWER : ?
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called Septic tank Lagoon Cesspool Skimming mill TRUE ANSWER : ? YOUR ANSWER : ?
The pH value of potable water should be between 4 to 5 6.5 to 8 13 to 14 1 to 1.5 TRUE ANSWER : ? YOUR ANSWER : ?