Mine Supports And Strata Control - Study Mode
[#141] The build up pump provided in hydrualic prop is comes under
Correct Answer
(B) Closed circuit
[#142] The thickness of flat base piece not less than . . . . . . . . used for setting props
Correct Answer
(D) 5 cm
[#143] If the two bodies are held in contact and one moves with respect to the other, the force P for just moving the body is
Correct Answer
(C) $${mu Q}$$
[#144] Compressive strength of curved resin
Correct Answer
(C) 12.5 kg/mm 2
[#145] The support employed in semi parmanent and parmanent road ways.
Correct Answer
(B) Steel arches