Opencast Mining - Study Mode
[#146] Rippability of the rocks can be known with the instrument.
Correct Answer
(B) Refraction seismograph
[#147] The number of blows produced by down the hole hammers bits.
Correct Answer
(C) 500 - 2400 per min
[#148] Jack hammer drills upto a depth of
Correct Answer
(C) 2 m
[#149] The stripping ratio for bucket wheel excavators is
Correct Answer
(B) 3 to 4 : 1
[#150] Which are the explosives used in strip mining.
Correct Answer
LOX