Question

In ________ drilling pattern, the drill holes slope both in the horizontal and vertical planes.

(a) Centre cut

(b) Parallel cut

(c) Pyramidal cut

(d) Straight line cut

Answer 1

The correct choice is (c) Pyramidal cut

Explanation: Four cut holes are arranged such a manner that when these holes are blasted, pyramidal shaped rock is removed from the surface of the rock. Whereas, in Centre cut pattern, the drill holes are arranged nearly parallel in horizontal plane with a slight inclination.