MCQ in Environmental Engineering Part 5 | Engineering Board Exam

(Last Updated On: July 28, 2022)

This is the Multiple Choice Questions Part 5 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 5 of the Series

⇐ MCQ in Environmental Engineering Part 4 | Engineering Board Exam

Choose the letter of the best answer in each questions.

201. 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

202. Per capita consumption of water is usually taken as

A. 50 – 100 liters

B. 150 – 300 liters

C. 400 – 500 liters

D. 500 – 750 liters

E. 750 – 1000 litters

203. 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

204. Which of the following has least wavelength?

A. Cosmic rays

B. Ultraviolet rays

C. X-rays

D. Gamma rays

E. None of the above

205. 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

206. The main disadvantage of hard water is

A. Higher density

B. More turbidity

C. Foul smell

D. Bad taste

E. Increased soap consumption

207. 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

208. 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

209. 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

210. 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

211. Swimming pool water requires

A. pre-chlorination

B. super-chlorination

C. dual-chlorination

D. de-chlorination

E. None of the above

212. Mycotoxins are poisonous chemicals produced by

A. bacteria

B. virus

C. molds

D. algae

E. None of the above

213. 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

214. The percentage of carbon dioxide 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

215. 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

216. 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

217. 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

218. 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

219. Sulphur dioxide can be measured by

A. ultraviolet pulsed fluorescence

B. flame photography

C. permeation tube calibration

D. Any of the above

E. None of the above

220. 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

221. 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

222. Which of the following is the major source of fly ash emission?

A. Sintering plants

B. Oil refineries

C. Blast furnace

D. Power plants

E. Sulphuric acid plant

223. 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

224. Theodolite is used by

A. Surveyors

B. Cartographers

C. Physicists

D. Electronic Engineers

E. None of these

225. 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

226. Water with least contamination can be obtained from

A. Rivers

B. Lakes

C. Wells

D. Reservoirs

E. Spring along the hill slope

227. Which of the following chemical is least poisonous?

A. Arsenic

B. Lead

C. Sodium

D. Cyanide

E. Mercury

228. Disinfection of drinking water means removal of

A. Turbidity

B. Colour

C. Odour

D. Oxygen

E. Bacteria

229. Scintillation counter can detect

A. beta rays

B. X-rays

C. gamma rays

D. All of the above

E. None of the above

230. Lead is a cumulative poison which ends up in

A. eyes

B. eyes and ears

C. bones and tissues

D. legs and hands

E. None of the above

231. Which of the following area of work needs lowest noise level?

A. Gymnasiums

B. Lecture halls

C. Library

D. Kitchens

E. None of the above

232. The hardness limit for portable water ranges between

A. 10 – 50 ppm

B. 50 – 65 ppm

C. 75 – 117 ppm

D. 150 – 250 ppm

E. 300 – 700 ppm

233. The process used for the removal of dissolved carbon dioxide from the water, is known as

A. Coagulation

B. Agitation

C. Aeration

D. Sedimentation

E. Zeolitc

234. Which of the following automobile will provide least pollution problems

A. Diesel engine powered

B. Petrol engine powered

C. Gas turbine powered

D. Wankel engine powered

E. Battery powered

235. Out of the following diesel engines, the minimum air consumption per BHP will be in

A. 4 stroke mechanical injection

B. 4 stroke air injection

C. 2 stroke mechanical injection pump scavenging

D. 2 stroke air injection

E. None of the above

236. The bad smell due to decomposition of sewage, on account of the action of bacteria, is mainly due to the presence of

A. Dead bacteria

B. Oxygen

C. Carbon dioxide

D. Hydrogen sulphide

E. None of the above

237. The permissible level of HCN in drinking water is

A. Less than 0.01 mg/liter

B. Around 1 mg/liter

C. Around 5 mg/liter

D. Between 10 to 20 mg/liter

E. More than 50 mg/liter

238. The chloride content in the water for public supplies should not exceed

A. 250 mg/liter

B. 100 mg/liter

C. 50 mg/liter

D. 20 mg/liter

E. 1 mg/liter

239. Which of the following fuel has maximum resistance to detonation?

A. Toluene

B. Benzene

C. Iso-octane

D. n-heptane

E. None of the above

240. The most frequent method of bacterial reproduction is by

A. Cell division

B. Sexual process

C. Budding

D. Colony formation

E. The formation of spores

241. Normally the colour of exhaust from a diesel engine is

A. black

B. white

C. yellow

D. reddish

E. None of the above

242. Geiger Muller counter can detect

A. beta rays

B. X-rays

C. gamma rays

D. All of the above

E. None of the above

243. Which of the following radionuclide has the shortest half-life?

A. Carbon 14

B. Cesium 137

C. Cobalt 60

D. Iodine 131

E. None of the above

244. The bacteria that can survive without oxygen is called

A. Facultative bacteria

B. Anerobic bacteria

C. Aerobic bacteria

D. Furobic bacteria

E. All of the above

245. Bit is the unit of

A. Amount of rain recorded

B. Memory of computer

C. Quantity of electricity

D. Intensity of an earthquake

E. None of these

246. The speed of sound will be maximum through

A. Water

B. Alcohol

C. Concrete

D. Aluminium

E. None of the above

247. Dark, black smoke from diesel engines usually results when engine is

A. Idling

B. Running at slow speeds

C. Running at light loads

D. Running at full speed but under load conditions

E. Running at full load and full speed

248. The noise level due to auto horn may be of the order of

A. 110 dB

B. 80 dB

C. 50 dB

D. 35 dB

E. None of the above

249. Which one among the following terms best describes the method of converting a spherical surface into a plane surface?

A. Photogrammetry

B. Projection

C. Cartography

D. Geodesy

E. None of these

250. Small concentrations of fluorides in water

A. reduce the prevalence of dental caries

B. increase the prevalence of dental carries

C. cause irritation in eyes

D. do not arm in any way

E. None of the above

Complete List of MCQs in General Engineering and Applied Science per topic