18151. 80% less than 200 mesh size particles are called
18152. Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
18153. Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
18154. TLV of ozone (O3) and phosgene (COCl2) in air is __________ ppm.
18155. Most of the atmospheric air pollutants are present in large quantity in
18156. The first Indian full-length animation movie
18157. 'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
18158. The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
18159. The Global Gender Gap Index 2014 quantifies the magnitude of gender based disparities and ranks countries based on key areas in gender equality .Among the countries of the world,India ranks---------in giving equality to sexes.
18160. Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
18161. Which of the following is not a secondary air pollutant ?
18162. The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
18163. The main industrial source of emission of hydrogen sulphide air pollutant is
18164. Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
18165. Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
18166. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
18167. Nitrogen oxides (NOx) is not produced in the __________ industry.
18168. World's worst radioactive pollution was caused by nuclear reactor disaster which occured in
18169. Dissolved oxygen content in river water is around __________ ppm.
18170. Oil and grease present in an emulsified state in waste water discharged from industries can be removed by
18171. The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
18172. Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called
18173. Which of the following is the most severe air pollutant ?
18174. Presence of bacteria in potable (drinking) water causes
18175. What are the methods of treatment & disposal of radioactive wastes ?
18176. Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
18177. Main pollutant present in automobile exhaust is
18178. Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
18179. Industrial workers working in leather tanning & manufacturing units are prone to suffer from
18180. -------------was re-elected as Brazilian President for a second term on October 27,
18181. Peroxyacyl nitrate (PAN), a pollutant is found in the
18182. Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.
18183. Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
18184. Which of the following is an affiliate of International Bank of Reconstruction and Development(World Bank)?
18185. Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
18186. COD of raw municipal sewage may be in the range of about __________ mg/litre.
18187. Maximum permissible turbidity in potable water is __________ ppm.
18188. Presence of __________ hardness is responsible for the temporary hardness in water.
18189. Dose of chlorine for disinfection of water is about __________ mg/litre of water.
18190. A shallow pond in which the sewage is retained and biologically treated is called
18191. Which is the most practical and economical method for removal of suspended solid matter from polluted water ?
18192. Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
18193. Iron & manganese present in the polluted water is removed by
18194. Water effluent generated in printing industry is decolourised by
18195. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
18196. __________ can not control the noise pollution.
18197. Ozone level is generally found to be depleted in India in the month of
18198. Noise level during normal conversation among men is about __________ decibles.
18199. 'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate' ?
18200. Foul odour and bad taste of water is removed by treating with