41,The usual inclination for the inclines is ..?,
1in3,
1in2,
1in4,
1in1,3
42, An underground roadway through stone connecting 2 or more coal seams is ..?,
tunnel,
cross measure drift,
crosscut,
staplepit,2
43,For a coal seam of moderate dip the shaft may be located in the .... of the property?,
rise,
middle,
dipside,
1/3from outcrop,2
44,The mode of entry shall be by shaft if the coal seam lying depth of more than by minimum.....m?,
20,30,40,50,2
45,As per indian standerds thick seam means having seam thickness ..?,
1.5-4.5m
0-1.5m,
4.5-9m,
above 9m,3
ANS:3, 2, 2, 2, 3
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