MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Fuel which detonates easity is |
| A. | Benzene |
| B. | Iso-octance |
| C. | n-heptane |
| D. | Toulene |
| E. | None of the above |
| Answer» D. Toulene | |
| 152. |
Which of the following is an artificial source of energy? |
| A. | Sun |
| B. | Coal |
| C. | Wood |
| D. | Electricity |
| E. | None of these |
| Answer» E. None of these | |
| 153. |
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» D. Lime is added to water | |
| 154. |
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» E. None of the above | |
| 155. |
Which of the following is considered as the noble gas? |
| A. | Oxygen |
| B. | Ozone |
| C. | Hydrogen |
| D. | Argon |
| E. | None of these |
| Answer» E. None of these | |
| 156. |
For the maximum alkalinity of water, the pH value would be |
| A. | Zero |
| B. | 7 |
| C. | 8 |
| D. | 14 |
| E. | 20 |
| Answer» E. 20 | |
| 157. |
Thiosulphate is the antidote for the poisonous effect due to |
| A. | Arsenic |
| B. | Lead |
| C. | Mercury |
| D. | Cyanide |
| E. | Organic phosphorous compounds |
| Answer» E. Organic phosphorous compounds | |
| 158. |
Which of the following particles will be smallest in size? |
| A. | Smog |
| B. | Rain |
| C. | Drizzle |
| D. | Mist |
| E. | Fog |
| Answer» B. Rain | |
| 159. |
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» E. None of the above | |
| 160. |
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» D. nuclear power plants | |
| 161. |
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» C. The carbon cycle | |
| 162. |
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» E. None of the above | |
| 163. |
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» D. 9 -- 11 | |
| 164. |
Which of the following measures the heat of combustion? |
| A. | Bomb's calorimeter |
| B. | Thermostat |
| C. | Beckmann's thermometer |
| D. | Refrigerator |
| E. | Green |
| Answer» B. Thermostat | |
| 165. |
Brackish taste of water is due to |
| A. | Chlorides of sodium |
| B. | Fluorides of sodium |
| C. | Turbidity |
| D. | Dead bacteria |
| E. | Any of the above |
| Answer» B. Fluorides of sodium | |
| 166. |
The hardness of soft water (in ppm) is |
| A. | 0 - 50 |
| B. | 50 - 150 |
| C. | 200 - 350 |
| D. | 375 - 500 |
| E. | 500 - 1000 |
| Answer» B. 50 - 150 | |
| 167. |
Short circuit means |
| A. | Direct flow of current between two points of different potential |
| B. | Indirect flow of current between two points |
| C. | Direct flow of current between points of the same potential |
| D. | none of the above |
| E. | Green |
| Answer» B. Indirect flow of current between two points | |
| 168. |
Sulphurdioxide can be measured by |
| A. | ultraviolet pulsed fluorescence |
| B. | flame photography |
| C. | permeation tube calibratio |
| D. | Any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 169. |
Mycotoxins are poisonous chemicals produced by |
| A. | bacteria |
| B. | virus |
| C. | molds |
| D. | algae |
| E. | None of the above |
| Answer» D. algae | |
| 170. |
Protection from radiations is possible through |
| A. | shielding of source of radiation |
| B. | increased distance from the source of radiation |
| C. | limitation on time of exposure |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 171. |
Which of the following has least wave-length? |
| A. | Cosmic rays |
| B. | Ultraviolet rays |
| C. | X-rays |
| D. | Gamma rays |
| E. | None of the above |
| Answer» B. Ultraviolet rays | |
| 172. |
Which of the following space needs maximum number of air changes per hour? |
| A. | Assembly halls |
| B. | Restaurants |
| C. | Bed-rooms |
| D. | Class rooms |
| E. | None of the above |
| Answer» C. Bed-rooms | |
| 173. |
Per capita consumption of water is usually taken as |
| A. | 50 - 100 litres |
| B. | 150 - 300 litres |
| C. | 400 - 500 litres |
| D. | 500 - 750 litres |
| E. | 750 - 1000 litres |
| Answer» C. 400 - 500 litres | |
| 174. |
Which of the following area of work needs highest level of illumination? |
| A. | Bakeries |
| B. | Book binding |
| C. | Confectionary factory |
| D. | Clothing factory |
| E. | None of the above |
| Answer» E. None of the above | |
| 175. |
The most injurious components of automobile exhaust for environment are |
| A. | Carbon monoxide and Carbon dioxide |
| B. | Carbon monoxide and lead |
| C. | Ethylene dichloride and ethylene dibromide |
| D. | Carbon dioxide and Sulphur dioxide |
| E. | Green |
| Answer» B. Carbon monoxide and lead | |
| 176. |
The emission of oxides of nitrogen in automobile exhaust will be least when the vehicle is |
| A. | Idling |
| B. | Cruising at low speed |
| C. | Cruising at high speed |
| D. | Accelerating |
| E. | Decelerating |
| Answer» B. Cruising at low speed | |
| 177. |
Swimming pool water requires |
| A. | pre-chlorination |
| B. | super-chlorination |
| C. | dual-chlorination |
| D. | de-chlorination |
| E. | None of the above |
| Answer» E. None of the above | |
| 178. |
The maximum permissible turbidity for drinking water |
| A. | Zero |
| B. | 1 - 4 ppm |
| C. | 15 - 25 ppm |
| D. | 3 - 50 ppm |
| E. | 30 - 50 ppm |
| Answer» D. 3 - 50 ppm | |
| 179. |
Which of the following is the major source of flyash emission? |
| A. | Sintering plants |
| B. | Oil refineries |
| C. | Blast furnace |
| D. | Power plants |
| E. | Sulphuric acid plant |
| Answer» E. Sulphuric acid plant | |
| 180. |
The percentage of carbondioxide in atmospheric air is nearly |
| A. | 3.2 percent |
| B. | 0.32 percent |
| C. | 0.032 percent |
| D. | 0.0032 percent |
| E. | None of the above |
| Answer» D. 0.0032 percent | |
| 181. |
Which of the following is unlikely to be the pollutant from a sulphuric acid plant? |
| A. | Sulphur dioxide |
| B. | Sulphur trioxide |
| C. | Acid moist |
| D. | Hydrogen sulphide |
| E. | None of the above |
| Answer» E. None of the above | |
| 182. |
Mottling of teeth is associated with the presence of |
| A. | Chloride in water |
| B. | Calcium in water |
| C. | Sodium chloride in water |
| D. | Sulphur in water |
| E. | Fluorides in water |
| Answer» F. | |
| 183. |
The maximum permissible level or pesticides, in general, in drinking water is nearly |
| A. | 1 to 50 ppm |
| B. | 50 to 100 ppm |
| C. | 100 to 250 ppm |
| D. | 250 to 500 ppm |
| E. | 500 to 1000 ppm |
| Answer» B. 50 to 100 ppm | |
| 184. |
Theodolite is used by |
| A. | Surveyors |
| B. | Cartrographers |
| C. | Physicists |
| D. | Electronic Engineers |
| E. | None of these |
| Answer» B. Cartrographers | |
| 185. |
The average percentage of carbon and hydrogen in petrol may be roughly given as |
| A. | 50% C, 50% H2 |
| B. | 85% C, 15% H2 |
| C. | 15% C, 85% H2 |
| D. | 70% C, 30% H2 |
| E. | None of the above |
| Answer» C. 15% C, 85% H2 | |
| 186. |
The speed of sound through water is nearly |
| A. | 344 m/s |
| B. | 750 m/s |
| C. | 1500 m/s |
| D. | 3000 m/s |
| E. | None of the above |
| Answer» D. 3000 m/s | |
| 187. |
Turbidity in water is due to |
| A. | Algae |
| B. | Fungi |
| C. | Organic salts |
| D. | Finely divided particles of clay, silt and organic matter |
| E. | None of the above |
| Answer» E. None of the above | |
| 188. |
The science of poisons - their effects, antidotes and detection, is known as |
| A. | Toxicology |
| B. | Minerology |
| C. | Petrology |
| D. | Poisonology |
| E. | Hermetilogy |
| Answer» B. Minerology | |
| 189. |
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» B. Hellige turbidimeter | |
| 190. |
If the pH of water is 7 it means the water is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | free from oxygen |
| E. | None of the above |
| Answer» D. free from oxygen | |
| 191. |
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» C. 8.70 kg | |
| 192. |
The process of killing the ineffective bacteria from the water and making it safe for use is known as |
| A. | Disinfection |
| B. | Sterilization |
| C. | Filtration |
| D. | Purification |
| E. | None of the above |
| Answer» B. Sterilization | |
| 193. |
The process of kolling at the pathogenic bacteria of water-borne diseases to make it safe for hospital use, is known as |
| A. | Zeoliting |
| B. | Debacterialisation |
| C. | Sterilization |
| D. | Aeration |
| E. | Chlorination |
| Answer» D. Aeration | |
| 194. |
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» B. Sedimentation process | |
| 195. |
The process used for the removal of dissolved carbondioxide from the water, is known as |
| A. | Coagulation |
| B. | Agitation |
| C. | Aeration |
| D. | Sedimentation |
| E. | Zeolitc |
| Answer» D. Sedimentation | |
| 196. |
The main disadvantage of hard water is |
| A. | Higher density |
| B. | More turbidity |
| C. | Foul smell |
| D. | Bad taste |
| E. | Increased soap consumption |
| Answer» F. | |
| 197. |
The presence of algae in water indicates that the water is |
| A. | Hard |
| B. | Soft |
| C. | Acidic |
| D. | Pune |
| E. | Free from turbidity |
| Answer» D. Pune | |
| 198. |
The disadvantage of hard water is |
| A. | More soap consumption |
| B. | Scale formation in boilers |
| C. | Corrosion of pipes |
| D. | Loss of taste in food |
| E. | All of the above |
| Answer» F. | |
| 199. |
Which of the following plant is highly sensitive to mercury vapour? |
| A. | Sunflower |
| B. | Ivy |
| C. | Aloc |
| D. | Cherry |
| E. | Sarcococca |
| Answer» B. Ivy | |
| 200. |
The incubation period of Typhoid bacillus causing typhoid fever is |
| A. | 1 to 3 days |
| B. | 3 to 5 days |
| C. | 7 to 21 days |
| D. | 20 to 30 days |
| E. | None of the above |
| Answer» D. 20 to 30 days | |