Drilling And Blasting - Study Mode

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[#561] Where a shaft accommodates a pair of single cages, the diameter may be nearly.

(A) 3 m

(B) 4.2 m

(C) 6 m

(D) 8 m

Correct Answer

(B) 4.2 m

[#562] An underground roadway through stone connecting two or more coal seams.

(A) Gallery

(B) Heading

(C) Drift for brevity

(D) Cross measure drift

Correct Answer

(D) Cross measure drift

[#563] Drivage of roadway in coal in a mine, and their network reaches a predetermined boundary called a . . . . . . . .

(A) Depillary

(B) Roads progressing

(C) Development

(D) Partial extraction

Correct Answer

(C) Development

[#564] Name the instrument to measure incubation period . . . . . . . .

(A) Incumeter

(B) Faze heater

(C) Calo meter

(D) None

Correct Answer

(D) None

[#565] Smoke helmet having . . . . . . . . eye pieces fitted in alluminium frame.

(A) Silica

(B) Glass

(C) Mica

(D) Quartz

Correct Answer

(C) Mica