McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering , Mechanical Engineering .
| 301. |
In case of public supplies, the maximum permissible nitrite content is |
| A. | 250 ppm |
| B. | 200 ppm |
| C. | 100 ppm |
| D. | 50 ppm |
| E. | zero ppm |
| Answer» E. zero ppm | |
| 302. |
All of the following are pesticides EXCEPT |
| A. | Aldrin |
| B. | Endrin |
| C. | Chloroform |
| D. | BHC |
| E. | None of the above |
| Answer» C. Chloroform | |
| 303. |
The presence of which of the following material in water is not considered to be dangerous? |
| A. | Lead |
| B. | Copper |
| C. | Mercury |
| D. | Calcium |
| E. | Zinc |
| Answer» D. Calcium | |
| 304. |
The desirable temperature of portable water is |
| A. | zero degree centigrade |
| B. | 10?C |
| C. | 20?C |
| D. | 27?C |
| E. | 37?C |
| Answer» B. 10?C | |
| 305. |
Turbidity of water is usually measured in terms of |
| A. | Platinum scale |
| B. | Cobalt scale |
| C. | Silica scale |
| D. | Calcium scale |
| E. | Sodium scale |
| Answer» C. Silica scale | |
| 306. |
Black holes are celestial bodies which |
| A. | Are self luminous bodies |
| B. | Do not allow any light to escape outside |
| C. | Green |
| D. | Have strong electrical field |
| E. | Have strong magentic field |
| Answer» B. Do not allow any light to escape outside | |
| 307. |
Which of the following is used in the recently developed technology for communication? |
| A. | Optical fibre |
| B. | Glass fibre |
| C. | Quartz fibre |
| D. | None of these |
| E. | Nylon fibre |
| Answer» A. Optical fibre | |
| 308. |
Disinfection of water is done by |
| A. | Alum |
| B. | Filtration |
| C. | Heating and cooling |
| D. | Ozone |
| E. | Passing chlorine |
| Answer» E. Passing chlorine | |
| 309. |
The maximum concentration of lead in drinking water should not exceed. |
| A. | 0.5 mg/litre |
| B. | 0.0005 mg/litre |
| C. | 5 mg/litre |
| D. | 0.005 mg/litre |
| E. | 0.05 mg/litre |
| Answer» E. 0.05 mg/litre | |
| 310. |
In power plant an electrostatic precipitators is installed between |
| A. | Furnace and chimney |
| B. | Induced draft fan and forced draft fan |
| C. | Forced draft fan and furnace |
| D. | Primary air and secondary air |
| E. | Air preheater and water treatment plant |
| Answer» A. Furnace and chimney | |
| 311. |
The aeration of water is done for the removal of |
| A. | Odour |
| B. | Turbidity |
| C. | Hardness |
| D. | Colour |
| E. | Bacteria |
| Answer» A. Odour | |
| 312. |
The method used for the removal of fine suspended particle is |
| A. | Flotation |
| B. | Screening |
| C. | Filtration |
| D. | Agitation |
| E. | Aeration |
| Answer» C. Filtration | |
| 313. |
Which of the following industry will usually have the highest concumption of water for processing? |
| A. | Foundry |
| B. | Aluminium industry |
| C. | Automobile industry |
| D. | Steel plant |
| E. | Paper mill |
| Answer» E. Paper mill | |
| 314. |
The presence of fluorides in drinking water helps in |
| A. | Preventing decaying of teeth |
| B. | Purification of water |
| C. | Reduces fungi formation |
| D. | Killing aerobic bacteria |
| E. | Deodourisation of water |
| Answer» A. Preventing decaying of teeth | |
| 315. |
The science of poisons - their effects, antidotes and detection, is known as |
| A. | Toxicology |
| B. | Poisonology |
| C. | Minerology |
| D. | Hermetilogy |
| E. | Petrology |
| Answer» A. Toxicology | |
| 316. |
Which thermometer is used to indicate the lowest temperature? |
| A. | Liquid thermometer |
| B. | Alcohol thermometer |
| C. | Green |
| D. | Resistance thermometer |
| E. | Clinical thermometer |
| Answer» B. Alcohol thermometer | |
| 317. |
For controlling the growth of algae, the chemical generally used is |
| A. | Bleaching powder |
| B. | Lime |
| C. | Ozone |
| D. | Copper sulphate |
| E. | Alum |
| Answer» D. Copper sulphate | |
| 318. |
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. | 1 mg/litre |
| E. | 50 mg/litre |
| Answer» D. 1 mg/litre | |
| 319. |
The discharge of hydrocarbons from automobile exhaust is maximum when the vehicle is |
| A. | Cruising at low speeds |
| B. | Idling |
| C. | Decelerating |
| D. | Cruising at high speeds |
| E. | Accelerating |
| Answer» B. Idling | |
| 320. |
Lead poisoning occurs when the lead content in water is |
| A. | 30 - 50 ppm |
| B. | 300 - 500 ppm |
| C. | 10 - 15 ppm |
| D. | 3 - 5 ppm |
| E. | 0.3 - 0.5 ppm |
| Answer» E. 0.3 - 0.5 ppm | |
| 321. |
Which of the following units measures the memory of the Computer? |
| A. | Bits |
| B. | None of these |
| C. | Volts |
| D. | Amperes |
| E. | Ohms |
| Answer» A. Bits | |
| 322. |
The atmosphere gets heated up mainly by |
| A. | Radiation from the earth's surface |
| B. | Radiogenic heat |
| C. | Heat of the earth's interior |
| D. | Direct sun-rays |
| E. | None of these |
| Answer» A. Radiation from the earth's surface | |
| 323. |
The ratio activity of water due to Strontium can be removed by |
| A. | Phosphate coagulation |
| B. | Lime |
| C. | Lime - Soda solution |
| D. | Alum coagulation |
| E. | Aeration |
| Answer» A. Phosphate coagulation | |
| 324. |
Which of the following plant is highly sensitive to mercury vapour? |
| A. | Sarcococca |
| B. | Sunflower |
| C. | Ivy |
| D. | Cherry |
| E. | Aloc |
| Answer» B. Sunflower | |
| 325. |
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. | Decelerating |
| E. | Accelerating |
| Answer» C. Cruising at high speed | |
| 326. |
For removal of temporary hardness of water |
| A. | Water is filtered |
| B. | Chlorine is passed through water |
| C. | Alum is added to water |
| D. | Water is boiled |
| E. | Lime is added to water |
| Answer» C. Alum is added to water | |
| 327. |
The total count of bacteria in portable water should not exceed |
| A. | 5000 per c.c. |
| B. | 998 per c.c. |
| C. | 1 mg/litre |
| D. | 10,000 per c.c. |
| E. | 10 per c.c. |
| Answer» E. 10 per c.c. | |
| 328. |
A blue smoke from a diesel engine indicates presence of |
| A. | Unburnt carbon |
| B. | Carbon monoxide |
| C. | Unburnt oil |
| D. | Nitrous oxide |
| E. | Carbon dioxide |
| Answer» C. Unburnt oil | |
| 329. |
For portable water the permissible pH value is |
| A. | 11 -- 14 |
| B. | 7 - 8.5 |
| C. | 4.5 - 7 |
| D. | 9 -- 11 |
| E. | 1 - 4.5 |
| Answer» B. 7 - 8.5 | |
| 330. |
Which of the following is the major source of environmental pollution in urban areas? |
| A. | Rolling mills |
| B. | Automobiles |
| C. | Electronic industries |
| D. | Power plants |
| E. | Floor mills |
| Answer» B. Automobiles | |
| 331. |
Which of the following is considered as the noble gas? |
| A. | None of these |
| B. | Hydrogen |
| C. | Argon |
| D. | Ozone |
| E. | Oxygen |
| Answer» C. Argon | |
| 332. |
Which of the following is an artificial source of energy? |
| A. | Wood |
| B. | Electricity |
| C. | Sun |
| D. | None of these |
| E. | Coal |
| Answer» B. Electricity | |
| 333. |
The hardness of soft water (in ppm) is |
| A. | 0 - 50 |
| B. | 200 - 350 |
| C. | 50 - 150 |
| D. | 375 - 500 |
| E. | 500 - 1000 |
| Answer» A. 0 - 50 | |
| 334. |
The process of removal of permanent hardness of water is |
| A. | Filtration process |
| B. | Zeolite process |
| C. | Sedimentation process |
| D. | Lime process |
| E. | Boiling process |
| Answer» B. Zeolite process | |
| 335. |
Which of the following measures the heat of combustion? |
| A. | Beckmann's thermometer |
| B. | Thermostat |
| C. | Green |
| D. | Refrigerator |
| E. | Bomb's calorimeter |
| Answer» E. Bomb's calorimeter | |
| 336. |
For the maximum alkalinity of water, the pH value would be |
| A. | 7 |
| B. | Zero |
| C. | 8 |
| D. | 20 |
| E. | 14 |
| Answer» E. 14 | |
| 337. |
Zeolite is |
| A. | Hydrated calcium silicate |
| B. | A naturally occurring salt |
| C. | Hydread silica |
| D. | Hydrated alumino-silicate |
| E. | Silicon carbide |
| Answer» D. Hydrated alumino-silicate | |
| 338. |
Which of the following particles will be smallest in size? |
| A. | Smog |
| B. | Drizzle |
| C. | Fog |
| D. | Rain |
| E. | Mist |
| Answer» A. Smog | |
| 339. |
Thiosulphate is the antidote for the poisonous effect due to |
| A. | Cyanide |
| B. | Lead |
| C. | Organic phosphorous compounds |
| D. | Mercury |
| E. | Arsenic |
| Answer» A. Cyanide | |
| 340. |
The presence of algae in water indicates that the water is |
| A. | Hard |
| B. | Acidic |
| C. | Soft |
| D. | Pune |
| E. | Free from turbidity |
| Answer» B. Acidic | |
| 341. |
The maximum permissible turbidity for drinking water |
| A. | 15 - 25 ppm |
| B. | 3 - 50 ppm |
| C. | 30 - 50 ppm |
| D. | 1 - 4 ppm |
| E. | Zero |
| Answer» A. 15 - 25 ppm | |
| 342. |
Per capita consumption of water is usually taken as |
| A. | 750 - 1000 litres |
| B. | 50 - 100 litres |
| C. | 500 - 750 litres |
| D. | 400 - 500 litres |
| E. | 150 - 300 litres |
| Answer» E. 150 - 300 litres | |
| 343. |
The most injurious components of automobile exhaust for environment are |
| A. | Green |
| B. | Carbon monoxide and Carbon dioxide |
| C. | Carbon monoxide and lead |
| D. | Carbon dioxide and Sulphur dioxide |
| E. | Ethylene dichloride and ethylene dibromide |
| Answer» B. Carbon monoxide and Carbon dioxide | |
| 344. |
The main disadvantage of hard water is |
| A. | Increased soap consumption |
| B. | Bad taste |
| C. | Foul smell |
| D. | More turbidity |
| E. | Higher density |
| Answer» A. Increased soap consumption | |
| 345. |
The maximum permissible level or pesticides, in general, in drinking water is nearly |
| A. | 50 to 100 ppm |
| B. | 1 to 50 ppm |
| C. | 100 to 250 ppm |
| D. | 250 to 500 ppm |
| E. | 500 to 1000 ppm |
| Answer» B. 1 to 50 ppm | |
| 346. |
The emission of oxides of nitrogen in automobile exhaust will be least when the vehicle is |
| A. | Accelerating |
| B. | Idling |
| C. | Cruising at high speed |
| D. | Cruising at low speed |
| E. | Decelerating |
| Answer» B. Idling | |
| 347. |
Mottling of teeth is associated with the presence of |
| A. | Fluorides in water |
| B. | Calcium in water |
| C. | Chloride in water |
| D. | Sulphur in water |
| E. | Sodium chloride in water |
| Answer» A. Fluorides in water | |
| 348. |
Which of the following is the major source of flyash emission? |
| A. | Sintering plants |
| B. | Sulphuric acid plant |
| C. | Power plants |
| D. | Oil refineries |
| E. | Blast furnace |
| Answer» C. Power plants | |
| 349. |
Theodolite is used by |
| A. | Electronic Engineers |
| B. | Cartrographers |
| C. | None of these |
| D. | Physicists |
| E. | Surveyors |
| Answer» E. Surveyors | |
| 350. |
Water with least contamination can be be obtained from |
| A. | Lakes |
| B. | Spring along the hill slope |
| C. | Wells |
| D. | Reservoirs |
| E. | Rivers |
| Answer» B. Spring along the hill slope | |
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