Chemical Engineering · all questions

Environmental Engineering
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Q281

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the

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Q282

Maximum permissible turbidity in potable water is __________ ppm.

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Q283

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

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Q284

Pick out the wrong statement.

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Q285

Presence of nitrates in water in excess of 50 ppm causes

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Q286

The resistance of water to the passage of light through it is a measure of the

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Q287

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

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Q288

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

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Q289

The common pollutant generated in chlor-alkali industry and battery manufacture is

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Q290

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

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Q291

Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

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Q292

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

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Q293

The pH value of oxidised sewage is about

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Q294

Industrial workers working in leather tanning & manufacturing units are prone to suffer from

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Q295

Which of the following acts as a natural source of air pollution?

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Q296

Which of the following is not a natural source of air pollution?

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Q297

Which of the following is the most detrimental for water used in high pressure boiler?

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Q298

A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.

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Q299

Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

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Q300

TLV of mercury in potable (drinking) water is about __________ ppm.

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