Miscellaneous In Mining - Study Mode

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[#106] For illumination in mines, the supply between two phases.

(A) 100 V

(B) 125 V

(C) 200 V

(D) 250 V

Correct Answer

(B) 125 V

[#107] A mine workers inhales normal air, where as exhaled air contains 16 - 65% O 2 and 3.82% CO 2 . The respiratory quotient of breathing for the worker is . . . . . . . .

(A) 0.23

(B) 0.89

(C) 0.99

(D) 1.13

Correct Answer

(B) 0.89

[#108] The bulb of old ham lead acid battery is filled with . . . . . . . .

(A) Nitron

(B) Butron

(C) Krypton

(D) None

Correct Answer

(C) Krypton

[#109] When methane is burnt two gasses are formed with a blue flame. Name the gases.

(A) CO 2 + CO

(B) CO 2 + H 2 O

(C) CO 2 + N 2

(D) CO 2 + CH 4

Correct Answer

(B) CO 2 + H 2 O

[#110] The greatest danger of pneumo coniosis in the size of dust is . . . . . . . .

(A) 3 micron

(B) 5 micron

(C) 4 micron

(D) 1 micron

Correct Answer

(D) 1 micron