Introduction To Mining Engineering - Study Mode
[#206] Positive Set Valve (PSV) is used to overcome the operator error in
Correct Answer
(D) powered support
[#207] A coal seam in India is said to be thick when the thickness is more than
Correct Answer
(D) 4.5 m
[#208] Which of the following is an item of u/g coalmine support?
Correct Answer
(B) pit Prop
[#209] Which of the following occur first in underground coal mines?
Correct Answer
(C) local fall
[#210] The ratio of length of explosive column to the hole diameter which will work as a spherical charge, is
Correct Answer
(A) L/D < 6