Drilling And Blasting - Study Mode
[#831] High rank coal with high carbon content (say over 85% d.m.m.f basis) is liable to self heating is . . . . . . . .
Correct Answer
(B) Less
[#832] In which DGMS Circulars the conditions for blasting in fire areas in opencast coal mine has been stipulated?
Correct Answer
(C) 2/1985, 2/1990
[#833] What is ventilation efficiency quotient
Correct Answer
(D) The ratio of quantity of air reaching the last ventilation connection and quantity of air entering the district
[#834] It is an area in a mine having number of working faces.
Correct Answer
(A) District
[#835] The ratio between power output to power input called . . . . . . . .
Correct Answer
(B) Mechanical efficiency