Mine Ventilation - Study Mode

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[#96] A mechanical mixture of extinctive gases carbondioxide and excess nitrogen reffered as

(A) white damp

(B) stink damp

(C) fire damp

(D) black damp

Correct Answer

(D) black damp

[#97] The height of excess of air column of D.C shaft, 1 m 2 in cross section which gives rise to NVP called.

(A) motive column

(B) fan pressure

(C) mechanical ventilation

(D) all of these

Correct Answer

(A) motive column

[#98] Synonymous with sulphureted hydrogen called as

(A) white damp

(B) stink damp

(C) fire damp

(D) after damp

Correct Answer

(B) stink damp

[#99] Human beings can survive in an atmospheric containing as low as . . . . . . . .% oxygen.

(A) 12.5

(B) 14.5

(C) 15

(D) 17.5

Correct Answer

(C) 15

[#100] Over all weight of portable optical methanometer.

(A) 0.5 kg

(B) 0.75 kg

(C) 1 kg

(D) 1.2 kg

Correct Answer

(C) 1 kg