Drilling And Blasting - Study Mode

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[#651] The air quality parameter required to be monitored under the Indian National Ambient Air Quality Standards is . . . . . . . .

(A) A s

(B) P b

(C) H g

(D) Silica

Correct Answer

(A) A s

[#652] The instruments that are used to measure the velocity of air are

(A) Smoke and dust method

(B) Velometer

(C) Pitot tube

(D) Anemometer

Correct Answer

(D) Anemometer

[#653] Light type stone dust barrier should be installed in lognwall gate conveyor roads within a range of . . . . . . . .m from the nearest point of the face.

(A) 50 - 120

(B) 100 - 120

(C) 120 - 150

(D) 150 - 200

Correct Answer

(A) 50 - 120

[#654] A district separated from other districts by an artificial brick wall or by a long pillar of coal called . . . . . . . .

(A) Panel

(B) Subpanel

(C) Barrier

(D) Barricade

Correct Answer

(C) Barrier

[#655] In degree II gassy mines the percentage of inflammable gas in the general body of air is . . . . . . . .

(A) Below 1

(B) Above 1

(C) Below 10

(D) Above 10

Correct Answer

(B) Above 1