Miscellaneous In Mining - Study Mode

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[#71] Safety torches are . . . . . . . . apparatus.

(A) Intrinsically safe

(B) Fire proof

(C) Water proof

(D) Gas proof

Correct Answer

(A) Intrinsically safe

[#72] The chemical contains in the lower container of acetylene portable hand lamp.

(A) Calcium chloride

(B) Calcium carbide

(C) Soda lime

(D) MgCI 2

Correct Answer

(B) Calcium carbide

[#73] The hot gases of flame rise by . . . . . . . . to the top of the gauzes and through them and the outlet holes at the bonnet.

(A) Conduction

(B) Radiation

(C) Convertion

(D) Reflection

Correct Answer

(C) Convertion

[#74] Wire gauze is . . . . . . . . conductor of heat.

(A) Bad

(B) Reacter

(C) Reflector

(D) Good

Correct Answer

(D) Good

[#75] The length of bore hole should not be less than . . . . . . . . which working near water logged workings.

(A) 3 m

(B) 5 m

(C) 7 m

(D) 10 m

Correct Answer

(A) 3 m