Underground Production Equipment Mid - I, September - 2014

1.Holes are drilled mechanically in rock and coal by
  • drilling machines
  • shearers
  • both a and b
  • none of these
Answer: A
2.A stopper is a drill for
  • drilling upward
  • drilling downward
  • both a and b
  • None of these
Answer: A
3.Which one of the following manufacturers coal drill ?
  • both b and c
  • MAMC
  • Voltas
  • None of these
Answer: A
4.The slow speed coal plough with a speed of
  • 20 m/min to 25 m/min
  • 1 m/min to 2 m/min
  • 3.0 m/min to 18 m/min
  • none of these
Answer: C
5.Shearer is used only on
  • LHD
  • SDL
  • Longwall Coal faces
  • all the above
Answer: C
6.The principal method of extracting coal
  • Longwall method
  • Board & Pillar method
  • both a and b
  • None of these
Answer: C
7.Semi-mechanised mines comes under which uses
  • LHD
  • SDL
  • both a and b
  • None of these
Answer: C
8.The top/middle/undercutting of face can be done by
  • LHD
  • SDL
  • coal cutting machine
  • None of these
Answer: C
9.Which one of the following is a coal cutting machine ?
  • Continuous miner
  • shearer
  • both a and b
  • None of these
Answer: C
10.One of the following manufacturers continuous miner
  • Joy mining machinery
  • SCCL
  • both a and b
  • None of these
Answer: A
11.For drilling in stone, drills operated by ......................................., give better results.
Answer: Compressed air
12.A drifter & stopper work on the same principle as a ............................ hammer.
Answer: Jack
13.SDL’s are .....................................................mounted vehicle.
Answer: Crawler chain
14.The drilling machine is known simply as a .......................................
Answer: Drill
15.In SCCL, First dragline was installed at ................................. mine
Answer: OCP-1, RGIII
16.DERD shearer stands for......................................................................
Answer: Double ended ranging drum
17.Deployment of machines at the working place from where mineral has to be extracted is known as ..........................................
Answer: Face mechanisation
18.AFC in longwall machine stands for ....................................................
Answer: Armoured face conveyor
19.The seam thickness suitable for caol ploughs operation is ...................m to ................... m.
Answer: 0.6m to 2m
20.The high speed coal plough operates with a speed of .................. to ................. m/min
Answer: 18 to 30 m/min