Coal Mining - Study Mode
[#421] To stop stowing which is done to avoid the jamming of the pipe?
Correct Answer
(A) Sand should be stopped first
[#422] Simultaneous sinking and supporting possible in this method of lining
Correct Answer
(A) Underhung
[#423] The shape of hangers used in temporary lining are
Correct Answer
(A) S
[#424] Which type of drill bit is suitable for very hard rock
Correct Answer
(D) Thermal bit
[#425] The main fall on L/W face generally occured after the face advance of . . . . . . . . m.
Correct Answer
(C) 45