1000+ Mechanical Engineering Objective Questions and Answers Pdf - 2

Question: 6

Which of the following is the major source of pollutant hydrogen sulphide?

(A) auto exhaust

(B) decaying organic matter

(C) solar energy

(D) oil burners

Question: 7

Alum increases

(A) acidity of water

(B) carbonates of water

(C) hardness of water

(D) sulphates in water

Question: 8

Lead is a cumulative poison which ends up in

(A) legs and handle

(B) bones and tissues

(C) eyes and ears

(D) eyes

Question: 9

Air pollutants common to urban environments are

(A) hydrocarbons

(B) sulphur dioxide

(C) particulate matter

(D) all of the above

Question: 10

Which of the following plant is highly sensitive to mercury vapour?

(A) aloe

(B) cherry

(C) ivy

(D) sunflower