Mine Ventilation - Study Mode

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[#171] U tube manometers are not useful for measurement of gas velocities below . . . . . . . .

(A) 6 m/sec

(B) 8 m/sec

(C) 10 m/sec

(D) 12 m/sec

Correct Answer

(D) 12 m/sec

[#172] The oil used in flame safety lamps, in line with DGMS approved.

(A) kerosene oil

(B) only petrol

(C) petrol and kerosene mix

(D) ESSO solvent BP1425

Correct Answer

(B) only petrol

[#173] Highest flood level with respect to mine surface level is

(A) 1 m

(B) 1.5 m

(C) 2.5 m

(D) 3 m

Correct Answer

(B) 1.5 m

[#174] The Non toxic gas is

(A) CO

(B) H 2

(C) Water particles

(D) Carbon dioxide

Correct Answer

(A) CO

[#175] In mine return air depleted in oxygen content and contaminated by . . . . . . . .

(A) mine gases

(B) five

(C) explosions

(D) self heating

Correct Answer

(A) mine gases