100+ Environmental Engineering MCQ Questions and Answers Pdf - 2

Question: 6

Water with maximum alkalinity pH value is

(A) 4

(B) 7

(C) 14

(D) 18

Question: 7

B. Coli or E. Coli are harmless organisms but their presence in water indicates the

(A) Absence of pathogenic bacteria

(B) Absence of non pathogenic bacteria

(C) Presence of non pathogenic bacteria

(D) Presence of pathogenic bacteria

Question: 8

Floatation is a method of water purification by

(A) Ion transfer

(B) Gas transfer

(C) Solid transfer

(D) Solute stabilization

Question: 9

Which one of the following is not a coagulating agent?

(A) Aluminium sulphate

(B) Copper sulphate

(C) Chlorinated coppers

(D) Sodium aluminate

Question: 10

In a rapid sand filter

(A) Water from sedimentation tank is supplied

(B) Water from coagulation tank is supplied

(C) Raw water from the source is supplied

(D) Any one of the above