MCQ in Environmental Engineering Part 4 | Engineering Board Exam

(Last Updated On: July 28, 2022)

This is the Multiple Choice Questions Part 4 of the Series in Environmental Engineering (Environmental Science) as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.

Continue Practice Exam Test Questions Part 4 of the Series

⇐ MCQ in Environmental Engineering Part 3 | Engineering Board Exam

Choose the letter of the best answer in each questions.

151. The bactericidal, virucidal and cysticidal efficiency of chlorine as a disinfectant

A. increases with a decrease in pH

B. increases with an increase in pH

C. decreases with a decrease in pH

D. decreases with an increase in pH

E. None of the above

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

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

154. The term BOD is associated with pollution arising out of

A. air

B. water

C. noise

D. land

E. None of the above

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

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

157. Which of the following units measures the memory of the computer?

A. Volts

B. Amperes

C. Ohms

D. Bits

E. None of these

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

159. Which of the following operation produces highest noise level?

A. welding

B. Riveting

C. Machining

D. Pressing

E. None of the above

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

161. Which of the following gas has least proportion in atmospheric air?

A. Argon

B. Carbon dioxide

C. Neon

D. Helium

E. None of the above

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

163. The atmosphere gets heated up mainly by

A. Direct sunrays

B. Radiation from the earth’s surface

C. Heat of the earth’s interior

D. Radiogenic heat

E. None of these

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

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

166. Which of the following plant is highly sensitive to mercury vapor?

A. Sunflower

B. Ivy

C. Aloc

D. Cherry

E. Sarcococca

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

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

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/liter

170. The rate at which atoms of radioactive sources disintegrate is measured in terms of

A. Curie

B. Atomic number

C. Wavelength

D. Frequency

E. None of the above

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

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

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

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

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

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

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

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

179. Which of the following is considered as the noble gas?

A. Oxygen

B. Ozone

C. Hydrogen

D. Argon

E. None of these

180. Which of the following is an artificial source of energy?

A. Sun

B. Coal

C. Wood

D. Electricity

E. None of these

181. The hardness of soft water (in ppm) is

A. 0 – 50

B. 50 – 150

C. 200 – 350

D. 375 – 500

E. 500 – 1000

182. The cycle of life, death and decay involving organic nitrogenous matter is called

A. The sulphur cycle

B. The nitrogen cycle

C. The carbon cycle

D. The hydrological cycle

E. None of the above

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

184. Fuel which detonates easily is

A. Benzene

B. Iso-octane

C. n-heptane

D. Toluene

E. None of the above

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

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

187. Which of the following measures the heat of combustion?

A. Bomb’s calorimeter

B. Thermostat

C. Beckmann’s thermometer

D. Refrigerator

E. Green

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

189. For the maximum alkalinity of water, the pH value would be

A. Zero

B. 7

C. 8

D. 14

E. 20

190. Zeolite is

A. A naturally occurring salt

B. Hydread silica

C. Silicon carbide

D. Hydrated calcium silicate

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

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

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

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

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

196. Thiosulphate is the antidote for the poisonous effect due to

A. Arsenic

B. Lead

C. Mercury

D. Cyanide

E. Organic phosphorous compounds

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

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 ionized gas

E. None of the above

199. The presence of algae in water indicates that the water is

A. Hard

B. Soft

C. Acidic

D. Pune

E. Free from turbidity

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

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