Environmental Engineering MCQ for GATE Pdf - 1

Question: 1

Most of the atmospheric air pollutants are present in large quantity in

(A) mesosphere

(B) trophosphere

(C) stratosphere

(D) thermosphere

Question: 2

Soluble silica present in boiler feed water can be removed by

(A) anion exchanger

(B) preheating it

(C) filtration

(D) coagulation

Question: 3

Sedimentary rocks are a major sink for

(A) carbon

(B) sulfur

(C) methane

(D) oxygen

Question: 4

Which of the following in non-biodegrable?

(A) aluminium foil

(B) earthworm

(C) vegetables

(D) fruit

Question: 5

Presence of bacteria in potable (drinking) water causes

(A) bad odour

(B) bad taste and colour

(C) disease

(D) turbidity