Mine Supports And Strata Control - Study Mode
[#161] The immediate roof is called
Correct Answer
(B) 6 m above the seam
[#162] Cavability of a roof bed in a long wall panel is affect by its
Correct Answer
Strength
[#163] For testing a specimen in laboratory length's diameter ratio should be
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(C) More than 2 : 1
[#164] The resistance which a body offers to being pulled asending by tensile force is called
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(D) Tenacity
[#165] The load on a prop when upper member is begins to sliders called
Correct Answer
(C) Yeild load