GATE Mechanical Engineering Question Papers with Answers 2023-2024 - 1

Question: 1

Which of the following is the major source of environmental pollution in urban areas?

(A) floor mills

(B) automobiles

(C) power plants

(D) rolling mills

Question: 2

Bleaching powder is

(A) hypo-chlorite of lime

(B) chloride of lime

(C) slacked lime

(D) lime

Question: 3

Which of the following is unlikely to be the pollutant from a sulphuric acid plant?

(A) hydrogen sulphide

(B) acid moist

(C) sulphur trioxide

(D) sulphur dioxide

Question: 4

Small concentration of fluorides in water

(A) do not arm in any way

(B) cause irrigation in eyes

(C) increase the prevalence of dental carries

(D) reduces the prevalence of dental carries

Question: 5

What will be the colour of red rose when it is seen through green glass?

(A) brown

(B) pink

(C) black

(D) white