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Environmental Engineering - Section 1 (6)

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Environmental Engineering - Section 1

This is the branch of engineering and here in this section you
will find all the MCQs problems related to environmental engineering.

41. 

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

A. NOx
B. Hg
C. SO2
D. F

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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42. 

In water chemical treatment plant, use of chloramines ensures

A. disinfection.
B. taste & odour control.
C. weed control in reservoirs.
D. removal of permanent hardness.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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43. 

Iron & manganese present as pollutant in water can not be removed by

A. ion exchange process.
B. oxidation followed by settling & filtration.
C. lime soda process or manganese zeolite process.
D. chlorination.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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44. 

Tolerable limit of nitrogen oxides in air is __________ ppm.

A. 0.1
B. 1
C. 5
D. 25

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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45. 

Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million).

A. 50
B. 1000
C. 2000
D. 5000

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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46. 

Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

A. hydrogen sulphide
B. mercury
C. cadmium
D. asbestos

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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47. 

Operating principle of cyclone separator is based on the action of __________ dust particles.

A. diffusion of
B. centrifugal force on
C. gravitational force on
D. electrostatic force on

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

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48. 

Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called

A. fumes
B. mists
C. smoke
D. aerosols

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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