1000+ Environmental Engineering Questions and Answers Pdf - 1

Question: 1

Which of the following is not a component of biosphere?

(A) atmosphere

(B) lithosphere

(C) hydrosphere

(D) thermosphere

Ans: D

thermosphere

Question: 2

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

(A) dissolved oxygen

(B) phenol

(C) silica

(D) turbidity

Ans: C

silica

Question: 3

Which of the following processes is involved in the biochemical treatment of sewage effluents?

(A) fermentation

(B) dehydration

(C) reduction

(D) oxidation

Ans: D

oxidation

Question: 4

Which of the following is a secondary air pollutant?

(A) dust particles

(B) nitrogen dioxide

(C) sulphur dioxide

(D) photochemical smog

Ans: D

photochemical smog

Question: 5

Most major source of air pollution in modern days is

(A) automobiles and industries

(B) dust storms

(C) volcanic eruptions

(D) forest fires

Ans: A

automobiles and industries

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