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Q) Match the following?

P. Drag cut             1. Parallel cut
Q. Burn cut            2. Horizontal half wedge cut
R. Pyramid cut      3. Vertical half wedge cut
S. Fan cut               4. Double wedge cut

  • P-1, Q-2, R-3, S-4
  • P-2, Q-1, R-4, S-3
  • P-3, Q-1, R-4, S-2
  • P-4, Q-1, R-3, S-2

(c) P-3, Q-1, R-4, S-2

Q) One half of the wedge cut has resembles with which of the following cut pattern?

  • Burn cut
  • Pyramid cut
  • Fan cut
  • Coromant cut

(c) Fan cut

Q) Which cut pattern is not dependent on the opening dimensions in underground rock excavation?

  • Burn cut
  • Pyramid cut
  • Wedge cut
  • Fan cut

(a) Burn cut

Q) Which type of drilling is the reliable way of exploratory drilling carried out prior to Mining?

  • Rotary-percussive drilling
  • Percussive drilling
  • Rotary drilling
  • Hydraulic drilling

(c) Rotary drilling

Q) The starting point of a vertical shaft at the grounding surface is called ________

  • Collar
  • Heading
  • Inset
  • Scaffold

(a) Collar

Q) Tri-cone drill bit is a type of

  • cross bit
  • button bit
  • rotary roller bit
  • button drag bit

(c) rotary roller bit

Q) In Down the hole drill, the piston strikes on the _______ to transfer energy.

  • Bit
  • Drill
  • Adaptor
  • None of these

(a) Bit

Q) The property that CANNOT be determined from uniaxial compressive strength test of a rock sample fitted with strain gauges is

  • Cohesion
  • Poisson’s ratio
  • modulus of elasticity
  • dilation

a. Cohesion

Q) The Percussive drills works based on _______ cutting principle.

  • Impact action
  • Rotary action
  • Both (a) & (b)
  • Cutting and ploughing

a. Impact action

Q) In Top hammer drill, the piston strikes on the __________ to transfer the energy.

  • Bit
  • Adaptor
  • Drill
  • None of these

b. Adaptor

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