A. Biological oxygen treatment
B. Coagulation and filtration
C. Adsorption in ion exchange materials
D. None of these
Correct Answer: Adsorption in ion exchange materials ✔
Last Updated: March 11, 2019
Related MCQs
- H2S present in gaseous stream can be removed by adsorption on __________?
- Maximum permissible turbidity in potable water is __________ ppm?
- Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________?
- Higher concentration of CO2 in atmosphere__________?
- Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?
- 80% less than 200 mesh size particles are called__________?
- High noise level in a chemical plant can be controlled by the__________?
- World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in __________?
- Exposure to chemicals having carcinogenic properties cause __________?
- Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels?
- COD of raw municipal sewage may be in the range of about __________ mg/litre?
- ‘Pneumoconiosis’ is a disease caused by the inhalation of __________ dust?
- A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm?
- Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels?
- Siderosis is a disease caused by the inhalation of __________ dust?
- Lagooning process is mainly a means of the__________?
- Peroxyacetyl nitrate (PAN), a pollutant is found in the__________?
- . Operating principle of cyclone separator is based on the action of __________ dust particles?
- Green house effect is accentuated by__________?
- Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause__________?
- The widest explosive limit is of __________, thereby making it the most explosive gas?
- Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for__________?
- Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels?
- Smoke is produced due to__________?
- World environment day is observed every year on the 5th of__________?
- Foul odour and bad taste of water is removed by treating with__________?
- Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water__________?
- Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent__________?
- Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in__________?
- TLV of mercury in potable (drinking) water is about __________ ppm?
- Presence of iron and manganese in water causes__________?
- Presence of soluble organics in polluted water causes__________?
- Persons working in cement plants and limestone quarries are more prone to disease like__________?
- The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________?
- In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?
- Which of the following is the most severe air pollutant ?
- Dust collection efficiency of a cyclone separator depends upon its__________?
- The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is__________?
- Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan__________?
- Main pollutants released from iron & steel industry is__________?
- A shallow pond in which the sewage is retained and biologically treated is called__________?
- Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________?
- Inhalation of silica dust causes a disease called__________?
- Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________?
- Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal ?
- Removal of __________ is accomplished by aeration of water?
- Which of the following pollutants, if present in atmosphere is detectable by its odour ?
- Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
- Pick out the correct statement ?
- When the concentration of SO2 in air is greater than __________ ppm, it gives a pungent smell?
- Which is the most practical and economical method for removal of suspended solid matter from polluted water ?