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McqMate
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 |
Answer» C. 15 - 25 ppm |
202. |
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» B. 150 - 300 litres |
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 |
Answer» C. 7 to 21 days |
204. |
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» A. Cosmic rays |
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 |
Answer» A. Carbon monoxide and Carbon dioxide |
206. |
The main disadvantage of hard water is |
A. | Higher density |
B. | More turbidity |
C. | Foul smell |
D. | Bad taste |
E. | Increased soap consumption |
Answer» 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 |
Answer» D. Clothing factory |
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 |
Answer» C. 1500 m/s |
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 |
Answer» D. All 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 |
Answer» A. Direct flow of current between two points of different potential |
211. |
Swimming pool water requires |
A. | pre-chlorination |
B. | super-chlorination |
C. | dual-chlorination |
D. | de-chlorination |
E. | None of the above |
Answer» D. de-chlorination |
212. |
Mycotoxins are poisonous chemicals produced by |
A. | bacteria |
B. | virus |
C. | molds |
D. | algae |
E. | None of the above |
Answer» C. molds |
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 |
Answer» A. 1 to 50 ppm |
214. |
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» C. 0.032 percent |
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 |
Answer» D. Finely divided particles of clay, silt and organic matter |
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 |
Answer» A. Idling |
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 |
Answer» 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 |
Answer» B. 85% C, 15% H2 |
219. |
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» D. Any 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 |
Answer» A. Chlorides of sodium |
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 |
Answer» D. Hydrogen sulphide |
222. |
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» D. Power plants |
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 |
Answer» A. Disinfection |
224. |
Theodolite is used by |
A. | Surveyors |
B. | Cartrographers |
C. | Physicists |
D. | Electronic Engineers |
E. | None of these |
Answer» A. Surveyors |
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 |
Answer» B. Restaurants |
226. |
Water with least contamination can be be obtained from |
A. | Rivers |
B. | Lakes |
C. | Wells |
D. | Reservoirs |
E. | Spring along the hill slope |
Answer» 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 |
Answer» C. Sodium |
228. |
Disinfection of drinking water means removal of |
A. | Turbidity |
B. | Colour |
C. | Odour |
D. | Oxygen |
E. | Bacteria |
Answer» 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 |
Answer» D. All 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 |
Answer» C. bones and tissues |
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 |
Answer» C. Library |
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 |
Answer» C. 75 - 117 ppm |
233. |
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» C. Aeration |
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 |
Answer» 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 |
Answer» A. 4 stroke mechanical injection |
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. | Carbondioxide |
D. | Hydrogen sulphide |
E. | None of the above |
Answer» D. Hydrogen sulphide |
237. |
The permissible level of HCN in drinking water is |
A. | Less than 0.01 mg/litre |
B. | Around 1 mg/litre |
C. | Around 5 mg/litre |
D. | Between 10 to 20 mg/litre |
E. | More than 50 mg/litre |
Answer» A. Less than 0.01 mg/litre |
238. |
The chloride content in the water for public supplies should not exceed |
A. | 250 mg/litre |
B. | 100 mg/litre |
C. | 50 mg/litre |
D. | 20 mg/litre |
E. | 1 mg/litre |
Answer» A. 250 mg/litre |
239. |
Which of the following fuel has maximum resistance to detonation? |
A. | Toulene |
B. | Benzene |
C. | Iso-octane |
D. | n-heptane |
E. | None of the above |
Answer» C. Iso-octane |
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 |
Answer» A. Cell division |
241. |
Normally the colour of exhaust from a diesel engine is |
A. | black |
B. | white |
C. | yellow |
D. | reddish |
E. | None of the above |
Answer» A. black |
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 |
Answer» D. All of the above |
243. |
Which of the following radio-nuclide has the shortest half life? |
A. | Carbon 14 |
B. | Cesium 137 |
C. | Cobalt 60 |
D. | Iodine 131 |
E. | None of the above |
Answer» D. Iodine 131 |
244. |
The becteria that can survive without oxygen is called |
A. | Facultative bacteria |
B. | Anerobic bacteria |
C. | Aerobic bacteria |
D. | Furobic bacteria |
E. | All of the above |
Answer» B. Anerobic bacteria |
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 |
Answer» B. Memory of computer |
246. |
The speed of sound will be maximum through |
A. | Water |
B. | Alcohol |
C. | Concrete |
D. | Aluminium |
E. | None of the above |
Answer» D. Aluminium |
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 |
Answer» 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 |
Answer» A. 110 dB |
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 |
Answer» B. Projection |
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 |
Answer» A. reduce the prevalence of dental caries |
251. |
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» E. All of the above |
252. |
The permissible hardness of water for public supplies is |
A. | 10 mg/litre |
B. | 25 mg/litre |
C. | 75 mg/litre |
D. | 115 mg/litre |
E. | 400 mg/litre |
Answer» D. 115 mg/litre |
253. |
For the combustion of 1 kg of carbon, the quantity of oxygen required is |
A. | 2.62 kg |
B. | 3.67 kg |
C. | 8 kg |
D. | 11.6 kg |
E. | None of the above |
Answer» A. 2.62 kg |
254. |
For controlling algae, the chemical generally used is |
A. | alum |
B. | lime |
C. | copper sulphate |
D. | bleaching powder |
E. | None of the above |
Answer» C. copper sulphate |
255. |
Soft waters |
A. | Have corrosive action on metals |
B. | Dissolve lead |
C. | Corrode iron |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
256. |
What will be the colour of red rose when it is seen through green glass? |
A. | White |
B. | Black |
C. | Pink |
D. | Brown |
E. | Green |
Answer» D. Brown |
257. |
Acute poisoning may be the result of entry into the body of large of concentrated doses of poison through |
A. | Breathing |
B. | Swalowing |
C. | Skin absorption |
D. | Injection |
E. | Any of the above |
Answer» E. Any of the above |
258. |
Carbondioxide has all the following properties EXCEPT that it is |
A. | colourless |
B. | odourless |
C. | tasteless |
D. | readily soluble in water |
E. | None of the above |
Answer» D. readily soluble in water |
259. |
The number of air changes per hour recommended for auditoria is |
A. | 3 to 6 |
B. | 6 to 10 |
C. | 10 to 12 |
D. | 15 to 20 |
E. | None of the above |
Answer» A. 3 to 6 |
260. |
Identify the incorrect statement if any Zeolite process is suitable for |
A. | Removing temporary hardness |
B. | Removing permanent hardness |
C. | Cent percent removal of hardness |
D. | Acidic waters |
E. | When zeolite becomes inactive, it may be reactivated by flushing with brine solution |
Answer» D. Acidic waters |
261. |
Which of the following constituent of air has the least percentage? |
A. | Argon |
B. | Carbon dioxide |
C. | Xenon |
D. | Neon |
E. | Helium |
Answer» C. Xenon |
262. |
While smoke from a diesel engine can be expected during |
A. | Start up or idling |
B. | High load operating |
C. | High speed operation |
D. | All of the above |
E. | None of the above |
Answer» A. Start up or idling |
263. |
If with minimum quantity of potassium permanganate, the pink colour of water disappears soon, then it shows that |
A. | Water is hard |
B. | Water is acidic |
C. | Water is alkaline |
D. | Organic matter is present in water |
E. | Chlorine content is high in water |
Answer» D. Organic matter is present in water |
264. |
Plants that grow in absence of sublight in water, are called |
A. | Algae |
B. | Shrubs |
C. | Fungi |
D. | Any of the above |
E. | All of the above |
Answer» C. Fungi |
265. |
Which one of the following gases shows a different behaviour at high pressure? |
A. | Carbon dioxide |
B. | Water vapours |
C. | Hydrogen |
D. | Ozone |
E. | None of these |
Answer» C. Hydrogen |
266. |
Bleaching power is |
A. | Lime |
B. | Stacked lime |
C. | Chloride of lime |
D. | Hypo-chloride of lime |
E. | Hypo-chlorite of lime |
Answer» E. Hypo-chlorite of lime |
267. |
The odour of water is expressed in terms of threshold number. The maximum threshold number permitted for public supplies is |
A. | 10 |
B. | 5 |
C. | 3 |
D. | 2 |
E. | 1 |
Answer» C. 3 |
268. |
The percentage of nitrogen in air by weight is around |
A. | 75.5 percent |
B. | 65.5 percent |
C. | 24.3 percent |
D. | 23.1 percent |
E. | 20.3 percent |
Answer» A. 75.5 percent |
269. |
What is a laser? |
A. | Electro-magnetic waves |
B. | Ultrasonic waves |
C. | Supersonic waves |
D. | Light amplification by stimulated emission of radiation |
E. | Green |
Answer» D. Light amplification by stimulated emission of radiation |
270. |
All of the following pollutants affect heart EXCEPT |
A. | Cadmium |
B. | Arsenic |
C. | Lead |
D. | Carbon monoxide |
E. | None of the above |
Answer» B. Arsenic |
271. |
The permissible hardness of water for low pressure boiler is |
A. | 50 mg/litre |
B. | 150 mg/litre |
C. | 250 mg/litre |
D. | 350 kg/litre |
E. | 450 mg/litre |
Answer» A. 50 mg/litre |
272. |
Desalination is usually needed for |
A. | well water |
B. | rain water |
C. | sea water |
D. | river water |
E. | None of the above |
Answer» C. sea water |
273. |
To keep the water safe against pathogenetic bacteria the residual chlorine should remain between |
A. | 0.05 to 0.2 ppm |
B. | 0.2 to 0.8 ppm |
C. | 1 ppm to 2 ppm |
D. | 6 ppm to 10 ppm |
E. | 10 ppm to 20 ppm |
Answer» A. 0.05 to 0.2 ppm |
274. |
Which of the following industry is least polluting? |
A. | Cement industry |
B. | Oil refinery |
C. | Thermal power plants |
D. | Electronic industry |
E. | Rolling mills |
Answer» D. Electronic industry |
275. |
Carbon monoxide poisoning may cause |
A. | headache |
B. | drowsiness |
C. | dizziness |
D. | Any of the above |
E. | None of the above |
Answer» D. Any of the above |
276. |
When the trees are planted by road side, the average distance between two trees should be |
A. | 2 to 3 metres |
B. | 5 to 8 metres |
C. | 10 to 15 metres |
D. | 25 to 30 metres |
E. | None of the above |
Answer» C. 10 to 15 metres |
277. |
Addition to 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 |
278. |
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» C. neutral |
279. |
The volume fraction of ozone in atmospheric air is nearly |
A. | 0.02 ppm |
B. | 0.2 ppm |
C. | 2 ppm |
D. | 20 ppm |
E. | None of the above |
Answer» A. 0.02 ppm |
280. |
Suspended liquid droplets generated by condensation from the gaseous to the liquid state or by breaking up a liquid into a dispersed state is known as |
A. | Dust |
B. | Fume |
C. | Mist |
D. | Vapours |
E. | None of the above |
Answer» C. Mist |
281. |
The maximum acceptable noise level in offices is |
A. | 10 dB |
B. | 40 dB |
C. | 75 dB |
D. | 100 dB |
E. | None of the above |
Answer» B. 40 dB |
282. |
Type of radiation expected from earbon 14 is |
A. | Alpha |
B. | Beta |
C. | Gamma |
D. | Alpha, Beta, Gamma |
E. | None of the above |
Answer» B. Beta |
283. |
The pH value of sea water is usually |
A. | 1 |
B. | Between 3 and 5 |
C. | Between 5 and 7 |
D. | Between 8 and 8.3 |
E. | Between 13.7 and 14 |
Answer» D. Between 8 and 8.3 |
284. |
Which of the following is the major source of pollutant hydrogen sulphide? |
A. | Decaying organic matter |
B. | Auto exhaust |
C. | Oil burners |
D. | Solar energy |
E. | None of the above |
Answer» A. Decaying organic matter |
285. |
The pH value of concentrated sulphuric acid could be expected between |
A. | 7 and 6 |
B. | 6 and 5 |
C. | 4 and 3 |
D. | 3 and 1 |
E. | 1 and 0 |
Answer» E. 1 and 0 |
286. |
Ultra-violet rays are used for the treatment of water known as |
A. | Dechlorination |
B. | Disinfection |
C. | Aeration |
D. | Filtration |
E. | Bleaching |
Answer» B. Disinfection |
287. |
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» C. Sterilization |
288. |
Electric fuses provide protection against |
A. | sparking |
B. | overloads |
C. | single phasing |
D. | low current and voltage |
E. | None of the above |
Answer» B. overloads |
289. |
In one litre sample of drinking water the coliform organism should not exceed |
A. | 1000 |
B. | 500 |
C. | 100 |
D. | 10 |
E. | 1 |
Answer» D. 10 |
290. |
When the trees are to be planted by the road side the minimum distance from the out edge of side width should be |
A. | 0.5 to 1 metre |
B. | 2 to 3 metres |
C. | 5 to 8 metres |
D. | 12 to 15 metres |
E. | None of the above |
Answer» B. 2 to 3 metres |
291. |
All of the following are souhd obsorptive materials EXCEPT |
A. | Rugs |
B. | Mirrors |
C. | Carpets |
D. | Heavy drapes |
E. | None of the above |
Answer» B. Mirrors |
292. |
Which of the following pollutant results from decaying organic matter? |
A. | Acetylene |
B. | Ozone |
C. | Ammonia |
D. | Nitric oxide |
E. | None of the above |
Answer» C. Ammonia |
293. |
All of the following pollutants result from auto-exhaust EXCEPT |
A. | Acetylene |
B. | Olefins |
C. | Hydrogen sulphide |
D. | Ethylene |
E. | None of the above |
Answer» A. Acetylene |
294. |
Dust particles in industrial processes may be generated by |
A. | Crushing |
B. | Grinding |
C. | Detonation |
D. | Rapid impact |
E. | Any of the above processes |
Answer» E. Any of the above processes |
295. |
Turbidity in water may be removed by |
A. | Sedimentation |
B. | Filtration |
C. | Agitation |
D. | Aeration |
E. | Oxidation |
Answer» A. Sedimentation |
296. |
Which of the following area of work needs lowest level of illumination? |
A. | Engraving |
B. | Cloth inspection |
C. | Assembly of instrument |
D. | Paper converting processes |
E. | None of the above |
Answer» D. Paper converting processes |
297. |
Which one of the following is not directly related to the phenomenon of evaporation? |
A. | Temperature of liquid |
B. | Volume of the liquid |
C. | Surface area of the liquid |
D. | Surface winds over the liquid |
E. | None of these |
Answer» B. Volume of the liquid |
298. |
For the maximum acidity of water, pH value would be |
A. | 0.01 |
B. | 0.1 |
C. | 1 |
D. | 10 |
E. | 11 |
Answer» A. 0.01 |
299. |
The process of passing the water through a thick layer of filtering media is known as |
A. | Sedimentation |
B. | Filtration |
C. | Disinfection |
D. | Purification |
E. | Putrification |
Answer» B. Filtration |
300. |
Which of the following is an insect born disease? |
A. | Q-fever |
B. | Ring worm |
C. | Jaundice |
D. | Tetanus |
E. | None of the above |
Answer» A. Q-fever |
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