McqMate
| 101. |
All of the following give Beta and Gamma radiations EXCEPT |
| A. | Iridium 192 |
| B. | Iodine 131 |
| C. | Cobalt 60 |
| D. | Polonium 210 |
| E. | None of the above |
| Answer» D. Polonium 210 | |
| 102. |
Which of the following is pesticide? |
| A. | Endrin |
| B. | Aldrin |
| C. | Toxaphone |
| D. | DDT |
| E. | All of the above |
| Answer» E. All of the above | |
| 103. |
DDT is |
| A. | An inorganic compound |
| B. | A compound of phosphours |
| C. | A chlorinated hydrocarbon |
| D. | A naturally occurring chemical |
| E. | None of the above |
| Answer» C. A chlorinated hydrocarbon | |
| 104. |
Term REM is used for |
| A. | solar radiation |
| B. | flame photography |
| C. | radiation exposure |
| D. | none of the above |
| E. | None of the above |
| Answer» C. radiation exposure | |
| 105. |
While comparing tungsten filament lamps with fluorescent tubes, all of the following are the advantages in favour of tungsten filament lamp EXCEPT |
| A. | Longer life |
| B. | Low cost |
| C. | More brightness |
| D. | Simple installation |
| E. | None of the above |
| Answer» A. Longer life | |
| 106. |
Odours are generally expressed in terms of |
| A. | Hardness number |
| B. | Gravity number |
| C. | Index number |
| D. | Threshold number |
| E. | None of the above |
| Answer» D. Threshold number | |
| 107. |
Disinfection of water is done by |
| A. | Filtration |
| B. | Alum |
| C. | Ozone |
| D. | Heating and cooling |
| E. | Passing chlorine |
| Answer» E. Passing chlorine | |
| 108. |
Which of the following is/are renewable sources of energy? |
| A. | Fall or flow of water |
| B. | Sun |
| C. | Wood |
| D. | All of the above |
| E. | Green |
| Answer» D. All of the above | |
| 109. |
The maximum concentration of lead in drinking water should not exceed. |
| A. | 0.0005 mg/litre |
| B. | 0.005 mg/litre |
| C. | 0.05 mg/litre |
| D. | 0.5 mg/litre |
| E. | 5 mg/litre |
| Answer» C. 0.05 mg/litre | |
| 110. |
Ash content of a diesel fuel should not exceed |
| A. | 10% |
| B. | 1% |
| C. | 0.50% |
| D. | 0.01% |
| E. | None of the above |
| Answer» C. 0.50% | |
| 111. |
In power plant an electrostatic precipitators is installed between |
| A. | Forced draft fan and furnace |
| B. | Furnace and chimney |
| C. | Primary air and secondary air |
| D. | Induced draft fan and forced draft fan |
| E. | Air preheater and water treatment plant |
| Answer» B. Furnace and chimney | |
| 112. |
Which emission has generally least proportion from a diesel engine as compared to a petrol engine? |
| A. | Oxides of nitrogen |
| B. | Hydrocarbons |
| C. | Carbon monoxide |
| D. | All of the above |
| E. | None of the above |
| Answer» A. Oxides of nitrogen | |
| 113. |
Which of the following turbidimeter gives direct readings in ppm |
| A. | Jackson turbidimeter |
| B. | Hellige turbidimeter |
| C. | Baylis turbidimeter |
| D. | All of the above |
| E. | None of the above |
| Answer» A. Jackson turbidimeter | |
| 114. |
Which of the following gas can be analysed by chemiluminescence? |
| A. | Ozone |
| B. | Carbon dioxide |
| C. | Nitrogen |
| D. | All of the above |
| E. | None of the above |
| Answer» A. Ozone | |
| 115. |
Permissible noise level in small conference room is |
| A. | 10 to 15 dB |
| B. | 15 to 25 dB |
| C. | 35 to 40 dB |
| D. | 55 to 60 dB |
| E. | None of the above |
| Answer» C. 35 to 40 dB | |
| 116. |
The aeration of water is done for the removal of |
| A. | Colour |
| B. | Turbidity |
| C. | Bacteria |
| D. | Odour |
| E. | Hardness |
| Answer» D. Odour | |
| 117. |
The method used for the removal of fine suspended particle is |
| A. | Filtration |
| B. | Agitation |
| C. | Flotation |
| D. | Aeration |
| E. | Screening |
| Answer» A. Filtration | |
| 118. |
Which organisms cause infections diseases? |
| A. | Viruses |
| B. | Worms |
| C. | Protozoa |
| D. | Fungi |
| E. | All of the above |
| Answer» E. All of the above | |
| 119. |
Alum increases |
| A. | Hardness of water |
| B. | Carbonates of water |
| C. | Sulphates in water |
| D. | Acidity of water |
| E. | None of the above |
| Answer» D. Acidity of water | |
| 120. |
Which of the following industry will usually have the highest concumption of water for processing? |
| A. | Foundry |
| B. | Steel plant |
| C. | Automobile industry |
| D. | Paper mill |
| E. | Aluminium industry |
| Answer» D. Paper mill | |
| 121. |
Electrodialysis is the process of removal of |
| A. | soluble gases in water |
| B. | dissolved solids in water |
| C. | suspended solids in water |
| D. | none of the above |
| E. | None of the above |
| Answer» B. dissolved solids in water | |
| 122. |
The presence of fluorides in drinking water helps in |
| A. | Purification of water |
| B. | Preventing decaying of teeth |
| C. | Deodourisation of water |
| D. | Reduces fungi formation |
| E. | Killing aerobic bacteria |
| Answer» B. Preventing decaying of teeth | |
| 123. |
Which radio nuclide has the least half life period? |
| A. | Carbon 14 |
| B. | Iodine 131 |
| C. | Radium |
| D. | Hydrogen 3 |
| E. | None of the above |
| Answer» B. Iodine 131 | |
| 124. |
Identify the incorrect statement if any |
| A. | If the pH value of water is 14 the water has maximum alkalinity |
| B. | pH value of 6 represents acidic water |
| C. | Water having pH value 4 will be more acidic than water having pH value of 6 |
| D. | Maximum acidity of water is indicated by pH value of zero |
| E. | None of the above |
| Answer» D. Maximum acidity of water is indicated by pH value of zero | |
| 125. |
The science of poisons - their effects, antidotes and detection, is known as |
| A. | Toxicology |
| B. | Minerology |
| C. | Petrology |
| D. | Poisonology |
| E. | Hermetilogy |
| Answer» A. Toxicology | |
| 126. |
Which of the following can have octane rating of more than 100? |
| A. | Gobar gas |
| B. | Methyl alcohol |
| C. | Benzol |
| D. | Ethyl alcohol |
| E. | None of the above |
| Answer» C. Benzol | |
| 127. |
Which thermometer is used to indicate the lowest temperature? |
| A. | Clinical thermometer |
| B. | Alcohol thermometer |
| C. | Resistance thermometer |
| D. | Liquid thermometer |
| E. | Green |
| Answer» B. Alcohol thermometer | |
| 128. |
In the jet propulsion, efficiency of the propulstion depends upon |
| A. | The speed of the vehicle |
| B. | Height at which the vehicle is travelling |
| C. | Density of the medium in which the vehicle is travelling |
| D. | All of the above |
| E. | Green |
| Answer» C. Density of the medium in which the vehicle is travelling | |
| 129. |
The speed of sound in air is |
| A. | 144 m/s |
| B. | 344 m/s |
| C. | 1344 m/s |
| D. | 3344 m/s |
| E. | None of the above |
| Answer» B. 344 m/s | |
| 130. |
Which of the following shading device will transmit least leat inside a room? |
| A. | Plain glass sheet 3 mm thick |
| B. | Plain glass sheet with wire mesh outside |
| C. | Plain glass sheet with Venetion blind inside |
| D. | Plain glass with curtain inside |
| E. | None of the above |
| Answer» D. Plain glass with curtain inside | |
| 131. |
All of the following pollutants are produced as a result of decaying organic matter EXCEPT |
| A. | Ammonia |
| B. | Sulphur dioxide |
| C. | Methane |
| D. | Hydrogen sulphide |
| E. | None of the above |
| Answer» B. Sulphur dioxide | |
| 132. |
Half life period for carbon 14 is nearly |
| A. | 1.2 days |
| B. | 5.73 days |
| C. | 5.73 years |
| D. | 5730 days |
| E. | None of the above |
| Answer» D. 5730 days | |
| 133. |
The unit parts per million is identical to |
| A. | Grains per galleon |
| B. | Pounds per cubic foot |
| C. | Milligrams per kg |
| D. | Tonnes peracre foot |
| E. | None of the above |
| Answer» C. Milligrams per kg | |
| 134. |
Which fuel will have least air consumption per kg of fuel during consumption? |
| A. | Gasoline |
| B. | Benzol |
| C. | Spirit |
| D. | Lubricating oil |
| E. | None of the above |
| Answer» C. Spirit | |
| 135. |
The desirable temperature inside an air conditioned auditorium is |
| A. | 0?C |
| B. | 5?C |
| C. | 10?C |
| D. | 20?C |
| E. | None of the above |
| Answer» D. 20?C | |
| 136. |
One kg of octane is burnt by four alternative processes given below. In which case the work available will be maximum |
| A. | When burnt in an open pan in atmosphere |
| B. | When burnt in an internal combustion engine |
| C. | When burnt in a fuel cell |
| D. | When burnt in a reversible process |
| E. | None of the above |
| Answer» D. When burnt in a reversible process | |
| 137. |
Which of the following is a cold cathode lamp? |
| A. | Sodium vapour lamp |
| B. | High pressure mercury vapour lamp |
| C. | Low pressure mercury vapour lamp |
| D. | Neon lamp |
| E. | None of the above |
| Answer» D. Neon lamp | |
| 138. |
Corrosive action of water could be due to its |
| A. | alkalinity |
| B. | hardness |
| C. | dissolved oxygen |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 139. |
The anitdote for the poisonous effects due to mercury, is |
| A. | Vitamin K |
| B. | BAL |
| C. | Thiosulphate |
| D. | Altropine |
| E. | Any of the above |
| Answer» B. BAL | |
| 140. |
The speed of sound through human body is around |
| A. | 344 m/s |
| B. | 688 m/s |
| C. | 1560 m/s |
| D. | 3120 m/s |
| E. | None of the above |
| Answer» C. 1560 m/s | |
| 141. |
A fuel of octane rating 85 matches the antiknock qualities of a mixture consisting of |
| A. | 85% petrol + 15% diesel |
| B. | 15% petrol + 85% diesel |
| C. | 85% benzene + 15% methyl chloride |
| D. | 85% octane + 15% heptane |
| E. | None of the above |
| Answer» D. 85% octane + 15% heptane | |
| 142. |
For controlling the growth of algae, the chemical generally used is |
| A. | Alum |
| B. | Lime |
| C. | Bleaching powder |
| D. | Copper sulphate |
| E. | Ozone |
| Answer» D. Copper sulphate | |
| 143. |
Out of the following metals the least permissible percentage in drinking water is |
| A. | Chromium |
| B. | Copper |
| C. | Zinc |
| D. | Lead |
| E. | None of the above |
| Answer» A. Chromium | |
| 144. |
The first aid for a victim of electric shock is |
| A. | bandage |
| B. | sprinkling of water on the face |
| C. | glass of milk and cold water |
| D. | artificial respiration |
| E. | None of the above |
| Answer» D. artificial respiration | |
| 145. |
Prechlorination |
| A. | Improves coagulation |
| B. | Reduces odours |
| C. | Reduces organisms |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 146. |
Which of the following engines uses two fuels simulataneously? |
| A. | Multifuel engine |
| B. | Wankel engines |
| C. | Free piston gas generator |
| D. | Dual fuel engines |
| E. | None of the above |
| Answer» D. Dual fuel engines | |
| 147. |
On board ships, the source of drinking water may be |
| A. | Rain water |
| B. | Sea water |
| C. | Desalted sea water |
| D. | Pumped deep sea water |
| E. | Any of the above |
| Answer» C. Desalted sea water | |
| 148. |
Which pollutants result from automobile exhaust? |
| A. | Carbon monoxide |
| B. | Nitrous oxide |
| C. | Hydrocarbons |
| D. | Sulphur dioxide |
| E. | All of the above |
| Answer» E. All of the above | |
| 149. |
The flouride content in the drinking water should not exceed |
| A. | 200 mg/litre |
| B. | 150 mg/litre |
| C. | 100 mg/litre50 mg/litre |
| D. | 50 mg/litre |
| E. | 1 mg/litre |
| Answer» E. 1 mg/litre | |
| 150. |
How many kg of air will contain one kg of oxygen? |
| A. | 1 kg |
| B. | 4.35 kg |
| C. | 8.70 kg |
| D. | 12.5 kg |
| E. | None of the above |
| Answer» B. 4.35 kg | |
| 151. |
The bactericidal, virucidal and cysticidal efficiency of chlorine as a disinfectant |
| A. | increases with a decrease in pH |
| B. | increases with a increase in pH |
| C. | decreases with a decrease in pH |
| D. | decreases with an increase in pH |
| E. | None of the above |
| Answer» A. increases with a decrease in pH | |
| 152. |
The air consumption of a four stroke diesel engine per rated BHP per hour will be |
| A. | 1 kg |
| B. | 5 to 7 kg |
| C. | 10 to 14 kg |
| D. | 20 kg |
| E. | None of the above |
| Answer» B. 5 to 7 kg | |
| 153. |
The discharge of hydrocarbons from automobile exhaust is maximum when the vehicle is |
| A. | Idling |
| B. | Cruising at low speeds |
| C. | Accelerating |
| D. | Decelerating |
| E. | Cruising at high speeds |
| Answer» A. Idling | |
| 154. |
The term BOD is associated with pollution arising out of |
| A. | air |
| B. | water |
| C. | noise |
| D. | land |
| E. | None of the above |
| Answer» B. water | |
| 155. |
Lead poisoning occurs when the lead content in water is |
| A. | 300 - 500 ppm |
| B. | 30 - 50 ppm |
| C. | 10 - 15 ppm |
| D. | 3 - 5 ppm |
| E. | 0.3 - 0.5 ppm |
| Answer» E. 0.3 - 0.5 ppm | |
| 156. |
Which of the following does not use ambient air for propulsion? |
| A. | Turbo jet |
| B. | Pulse jet |
| C. | Turbo-prop |
| D. | Rocket |
| E. | None of the above |
| Answer» D. Rocket | |
| 157. |
Which of the following units measures the memory of the Computer? |
| A. | Volts |
| B. | Amperes |
| C. | Ohms |
| D. | Bits |
| E. | None of these |
| Answer» D. Bits | |
| 158. |
A hard water may contain |
| A. | Calcium carbonate |
| B. | Magnesium sulphate |
| C. | Magnesium bicarbonate |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 159. |
Which of the following operation produces highest noise level? |
| A. | welding |
| B. | Riveting |
| C. | Machining |
| D. | Pressing |
| E. | None of the above |
| Answer» B. Riveting | |
| 160. |
Water gas is a mixture of |
| A. | CO and H2 |
| B. | N2 and H2 |
| C. | CO2 and N2 |
| D. | SO2, CO2 and N2 |
| E. | None of the above |
| Answer» A. CO and H2 | |
| 161. |
Which of the following gas has least proportion in atmospheric air? |
| A. | Argon |
| B. | Carbondioxide |
| C. | Neon |
| D. | Helium |
| E. | None of the above |
| Answer» D. Helium | |
| 162. |
Which of the following symptom is not common between food poisoning and carbon monoxide poisoning? |
| A. | Nausea |
| B. | Vomiting |
| C. | Headache |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Headache | |
| 163. |
The atmosphere gets heated up mainly by |
| A. | Direct sun-rays |
| B. | Radiation from the earth's surface |
| C. | Heat of the earth's interior |
| D. | Radiogenic heat |
| E. | None of these |
| Answer» B. Radiation from the earth's surface | |
| 164. |
The ratio activity of water due to Strontium can be removed by |
| A. | Aeration |
| B. | Alum coagulation |
| C. | Phosphate coagulation |
| D. | Lime |
| E. | Lime - Soda solution |
| Answer» C. Phosphate coagulation | |
| 165. |
Aeration of water is done for all of the following purposes EXCEPT for |
| A. | removal of bad tastes |
| B. | removal of carbon dioxide |
| C. | increasing the quantity of oxygen in water |
| D. | removal of temporary hardness |
| E. | None of the above |
| Answer» D. removal of temporary hardness | |
| 166. |
Which of the following plant is highly sensitive to mercury vapour? |
| A. | Sunflower |
| B. | Ivy |
| C. | Aloc |
| D. | Cherry |
| E. | Sarcococca |
| Answer» A. Sunflower | |
| 167. |
The emission of carbon monoxide in automobile exhaust will be low when the vehicle is |
| A. | Idling |
| B. | Cruising at low speed |
| C. | Cruising at high speed |
| D. | Accelerating |
| E. | Decelerating |
| Answer» C. Cruising at high speed | |
| 168. |
For removal of temporary hardness of water |
| A. | Water is filtered |
| B. | Water is boiled |
| C. | Alum is added to water |
| D. | Lime is added to water |
| E. | Chlorine is passed through water |
| Answer» C. Alum is added to water | |
| 169. |
The total count of bacteria in portable water should not exceed |
| A. | 10,000 per c.c. |
| B. | 5000 per c.c. |
| C. | 998 per c.c. |
| D. | 10 per c.c. |
| E. | 1 mg/litre |
| Answer» D. 10 per c.c. | |
| 170. |
The rate at which atoms of radioactive sources disintegrate is measured in terms of |
| A. | Cuire |
| B. | Atomic number |
| C. | Wavelength |
| D. | Frequency |
| E. | None of the above |
| Answer» A. Cuire | |
| 171. |
BF3 counter can detect which of the following radiations? |
| A. | Alpha particles |
| B. | Neutrons |
| C. | X-rays |
| D. | Beta rays |
| E. | None of the above |
| Answer» B. Neutrons | |
| 172. |
For minimal eye irritation, pH value of swimming pool water should be in the range |
| A. | 6.2 to 6.8 |
| B. | 6.5 to 7.0 |
| C. | 7.0 to 7.2 |
| D. | 7.5 to 7.6 |
| E. | None of the above |
| Answer» D. 7.5 to 7.6 | |
| 173. |
Car speed of a lift is usually |
| A. | 0.1 to 0.3 m/s |
| B. | 0.5 to 1 m/s |
| C. | 2 to 5 m/s |
| D. | 7 to 10 m/s |
| E. | None of the above |
| Answer» B. 0.5 to 1 m/s | |
| 174. |
A blue smoke from a diesel engine indicates presence of |
| A. | Nitrous oxide |
| B. | Carbon dioxide |
| C. | Carbon monoxide |
| D. | Unburnt oil |
| E. | Unburnt carbon |
| Answer» D. Unburnt oil | |
| 175. |
Which of the following is not a constituent of coal? |
| A. | Hydrogen |
| B. | Nitrogen |
| C. | Inorganic matter |
| D. | Manganese |
| E. | None of the above |
| Answer» D. Manganese | |
| 176. |
For portable water the permissible pH value is |
| A. | 1 - 4.5 |
| B. | 4.5 - 7 |
| C. | 7 - 8.5 |
| D. | 9 -- 11 |
| E. | 11 -- 14 |
| Answer» C. 7 - 8.5 | |
| 177. |
The percentage of krypton in atmospheric air is around |
| A. | 0.01 ppm |
| B. | 0.1 ppm |
| C. | 1 ppm |
| D. | 10 ppm |
| E. | None of the above |
| Answer» C. 1 ppm | |
| 178. |
Which of the following is the major source of environmental pollution in urban areas? |
| A. | Rolling mills |
| B. | Power plants |
| C. | Automobiles |
| D. | Floor mills |
| E. | Electronic industries |
| Answer» C. Automobiles | |
| 179. |
Which of the following is considered as the noble gas? |
| A. | Oxygen |
| B. | Ozone |
| C. | Hydrogen |
| D. | Argon |
| E. | None of these |
| Answer» D. Argon | |
| 180. |
Which of the following is an artificial source of energy? |
| A. | Sun |
| B. | Coal |
| C. | Wood |
| D. | Electricity |
| E. | None of these |
| Answer» D. Electricity | |
| 181. |
The hardness of soft water (in ppm) is |
| A. | 0 - 50 |
| B. | 50 - 150 |
| C. | 200 - 350 |
| D. | 375 - 500 |
| E. | 500 - 1000 |
| Answer» A. 0 - 50 | |
| 182. |
The cycle of life, death and decay involving organic nitrogeneous matter is called |
| A. | The sulphur cycle |
| B. | The nitrogen cycle |
| C. | The carbon cycle |
| D. | The hydrological cycle |
| E. | None of the above |
| Answer» B. The nitrogen cycle | |
| 183. |
The process of removal of permanent hardness of water is |
| A. | Zeolite process |
| B. | Sedimentation process |
| C. | Filtration process |
| D. | Boiling process |
| E. | Lime process |
| Answer» A. Zeolite process | |
| 184. |
Fuel which detonates easity is |
| A. | Benzene |
| B. | Iso-octance |
| C. | n-heptane |
| D. | Toulene |
| E. | None of the above |
| Answer» C. n-heptane | |
| 185. |
Which of the following constituent has highest proportion in atmospheric air? |
| A. | Nitrous oxide |
| B. | Carbon monoxide |
| C. | Helium |
| D. | Neon |
| E. | None of the above |
| Answer» D. Neon | |
| 186. |
Which of the following acts as ignition accelerator for C.I. engine fuels? |
| A. | Acetone peroxide |
| B. | Hydrogen peroxide |
| C. | Aromatic compounds |
| D. | n-heptane |
| E. | None of the above |
| Answer» A. Acetone peroxide | |
| 187. |
Which of the following measures the heat of combustion? |
| A. | Bomb's calorimeter |
| B. | Thermostat |
| C. | Beckmann's thermometer |
| D. | Refrigerator |
| E. | Green |
| Answer» A. Bomb's calorimeter | |
| 188. |
Which of the following is unlikely to be the pollutant from a sulphuric acid plant? |
| A. | Sulphur dioxide |
| B. | Sulphur trioxide |
| C. | Acid mist |
| D. | Hydrogen sulphide |
| E. | All of the above |
| Answer» D. Hydrogen sulphide | |
| 189. |
For the maximum alkalinity of water, the pH value would be |
| A. | Zero |
| B. | 7 |
| C. | 8 |
| D. | 14 |
| E. | 20 |
| Answer» D. 14 | |
| 190. |
Zeolite is |
| A. | A naturally occurring salt |
| B. | Hydread silica |
| C. | Silicon carbide |
| D. | Hydrated calcium silicate |
| E. | Hydrated alumino-silicate |
| Answer» E. Hydrated alumino-silicate | |
| 191. |
Which of the following particles will be smallest in size? |
| A. | Smog |
| B. | Rain |
| C. | Drizzle |
| D. | Mist |
| E. | Fog |
| Answer» A. Smog | |
| 192. |
Which of the following disease is associated with air pollution? |
| A. | Bronchial asthma |
| B. | Chronic bronchitis |
| C. | Emphysema |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 193. |
The water borne bacterial infections may cause |
| A. | Typhoid fever |
| B. | Dysentery |
| C. | Cholera |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 194. |
LPG stands for |
| A. | Liquefied petroleum gas |
| B. | Low pressure gas |
| C. | Lubricated and purified gas |
| D. | Low purity gas |
| E. | None of the above |
| Answer» A. Liquefied petroleum gas | |
| 195. |
Which of the following symptoms will not show that combustion is necessarily complete? |
| A. | Presence of free carbon is exhaust |
| B. | Presence of carbon monoxide in exhaust |
| C. | Presence of oxygen in exhaust |
| D. | Presence of nitrogen in exhaust |
| E. | None of the above |
| Answer» D. Presence of nitrogen in exhaust | |
| 196. |
Thiosulphate is the antidote for the poisonous effect due to |
| A. | Arsenic |
| B. | Lead |
| C. | Mercury |
| D. | Cyanide |
| E. | Organic phosphorous compounds |
| Answer» D. Cyanide | |
| 197. |
Low grade fuels have |
| A. | low moisture content |
| B. | low ash content |
| C. | low calorific value |
| D. | low carbon content |
| E. | None of the above |
| Answer» C. low calorific value | |
| 198. |
Curies is a measure of |
| A. | biological effect of radiation which a man can sustain |
| B. | the rate at which atoms of radioactive sources disintegrate |
| C. | 86 ergs of energy per gram of air |
| D. | ions percent in an ionised gas |
| E. | None of the above |
| Answer» A. biological effect of radiation which a man can sustain | |
| 199. |
The presence of algae in water indicates that the water is |
| A. | Hard |
| B. | Soft |
| C. | Acidic |
| D. | Pune |
| E. | Free from turbidity |
| Answer» C. Acidic | |
| 200. |
Electrostatic precipitators are largely used in |
| A. | water treatment plants |
| B. | sewage disposal plants |
| C. | Thermal power plants |
| D. | nuclear power plants |
| E. | None of the above |
| Answer» C. Thermal power plants | |
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