Mine Ventilation - Practice Test

(A) 5 ppm

(B) 50 ppm

(C) 0.5 ppm

(D) 500 ppm

(B) 50 ppm

(A) 8

(B) 9

(C) 10

(D) 11

(C) 10

(A) 200 grams

(B) 600 grams

(C) 700 grams

(D) 800 grams

(D) 800 grams

(A) blasting

(B) after coal dust explosion

(C) after fire

(D) all of these

(D) all of these

(A) 0.75% in the general body of the return air of any ventilation district and 1.5% in any place of the mine

(B) 0.75% in the general body of the return air of any ventilation district and 1.25% in any place of the mine

(C) 0.5% in the general body of the return air of any ventilation district and 1.25% in any place of the mine.

(D) 0.5% in the general body of the return air of any ventilation district and 1.5% in any place of the mine.

(B) 0.75% in the general body of the return air of any ventilation district and 1.25% in any place of the mine

Mine Ventilation - Study Mode