Drilling And Blasting - Study Mode

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[#431] The person in each inhalation inspires about . . . . . . . . litres of air of which he consumes about . . . . . . . . cc of oxygen so that with breaths per min.

(A) 2, 100, 15

(B) 1, 50, 20

(C) 2, 50, 20

(D) None

Correct Answer

(A) 2, 100, 15

[#432] It is given in the statute that when two working places below ground have approached within A metre of each other, the Shotfirer shall fire in any of the two faces only. A is given by

(A) 9 m

(B) 12 m

(C) 15 m

(D) 18 m

Correct Answer

(A) 9 m

[#433] The O 2 needed for breathing is produced by . . . . . . . . in chemical O 2 breathing apparatus. AVER/SAR-30.

(A) Calcium superoxide

(B) Nitro oxide

(C) Potassium oxide

(D) Potassium superoxide

Correct Answer

(D) Potassium superoxide

[#434] Which type of fan produce more noise . . . . . . . .

(A) Centrifugal

(B) Axial flow

(C) Panta

(D) All of these

Correct Answer

(B) Axial flow

[#435] Power of ventilationis proportional to

(A) V 2

(B) V

(C) V 3

(D) $$sqrt { ext{V}} $$

Correct Answer

(C) V 3