Mine Supports And Strata Control - Study Mode
[#156] Roof in Giridih coal field consists of
Correct Answer
(C) Sand stone
[#157] In case of tapered prop, by increasing roof pressure the tapered end burrs and shows . . . . . . . .
Correct Answer
(A) Yeilding
[#158] The percentage of water content used in hydraulic prop.
Correct Answer
(C) 95%
[#159] Which roof gives rarely warning before collapse
Correct Answer
(D) shale
[#160] Abbrevation form of CMPDIL
Correct Answer
(A) Central Mine Planning and Design Institute Limited