Mine Supports And Strata Control - Study Mode

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[#121] In roof stitching face should not be advanced more than . . . . . . . . meters from the last tensioned rope:

(A) 2 m

(B) 2.4 m

(C) 3 m

(D) 4 m

Correct Answer

(B) 2.4 m

[#122] Unit of blast induced vibration is

(A) mm/s

(B) pascal

(C) Nm

(D) kg/cm 2

Correct Answer

(A) mm/s

[#123] Hard coke, classified as Grade I, coke has ash percentage less than

(A) 15

(B) 18

(C) 20

(D) 24

Correct Answer

(C) 20

[#124] Which of the subsidiaries of coal India Limited contributed on the top ranking profit making subsiding among it subsidiaries

(A) SECL

(B) WCL

(C) CCL

(D) NCL

Correct Answer

(D) NCL

[#125] The weight of the steel rail used for lying tracks

(A) 32 lbs

(B) 36 lbs

(C) 30 lbs

(D) 40 lbs

Correct Answer

(B) 36 lbs