Chemical Engineering · all questions

Environmental Engineering
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

307

Questions

12/16

Page

Pick an option on a question to see the right answer and solution.

Q221

__________ is removed from water by lime-soda process.

Select an option to see the answer and solution.

Q222

The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the

Select an option to see the answer and solution.

Q223

A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Select an option to see the answer and solution.

Q224

Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?

Select an option to see the answer and solution.

Q225

Dust collection efficiency of a cyclone separator depends upon its

Select an option to see the answer and solution.

Q226

The biological decomposition of organic substances in wastes controlled conditions is called

Select an option to see the answer and solution.

Q227

Which of the following is not a secondary air pollutant?

Select an option to see the answer and solution.

Q228

Arsenic pollutant is not generated in____industries.

Select an option to see the answer and solution.

Q229

Presence of bacteria in potable (drinking) water causes

Select an option to see the answer and solution.

Q230

The pH value of potable water should be between

Select an option to see the answer and solution.

Q231

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

Select an option to see the answer and solution.

Q232

'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

Select an option to see the answer and solution.

Q233

Algae growth in water is controlled by

Select an option to see the answer and solution.

Q234

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for

Select an option to see the answer and solution.

Q235

Ozone is

Select an option to see the answer and solution.

Q236

Pick out the wrong statement

Select an option to see the answer and solution.

Q237

High noise level in a chemical plant can be controlled by the

Select an option to see the answer and solution.

Q238

Which of the following fine dust removal equipments is the most efficient?

Select an option to see the answer and solution.

Q239

When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.

Select an option to see the answer and solution.

Q240

Aerobic biological oxidation ponds used for the purification of polluted water

Select an option to see the answer and solution.

Prev 10 11 12 13 14 Next