46,As per indian standerds steep mines means having seam dip(in deg)..?,
0-5,5-18,18-40,above 40,
47,As per indian standerds deep mines means if the seam lying depth from surface is..?,
Less than 200m,200-450,450-600m,above 600m,
48,In deg I mines the % of inflammable gas is ..?,
lessthan 0.1,0.1to1,1-10,above10,
49,A gallery which cuts across the pillers due to its drivage along an apperent dip is called..?,
crosscut,leval,dip,drift,
50,The max width of the gallery in indian coal mines is ....?,
3m,4m,4.8m,5.5m,
Ans:3, 2, 1, 1, 3
No comments:
Post a Comment