• Insert detonator into explosive cartridge
  • To check the cracks in shot hole
  • To clean the shot hole
  • All above

The Blaster’s tool known as Pricker made of wood or a non-ferrous metal is used to Insert detonator into explosive cartridge in blasting in open cast mine.

  • 4 to 6
  • 10
  • 12
  • Any number of buckets

Optimum Dumper and Excavator matching at 4 to 6 buckets of Excavator for optimum productivity in open cast mine. 

  • Form M
  • Form P-I/P
  • Form O
  • None of the above

Form P-I/P are the standards for medical examination for miners

  • 3
  • 60
  • 106
  • 19

Prior approval/permission from Chief Inspector/Director General of Mines Safety for use Drilling & Blasting and/or Heavy Earth Moving Machinery in opencast Mines is required to be taken under provisions of 106 Regulation of MMR 1961.

a) Lux 

b) Watts 

c) Brightness 

d) None of the above

Illumination in mines is measured in Lux Units of Measurement.

  • 85
  • 90
  • 120
  • None of the above

Mine Occupational disease known as “Noise Induced Hearing Loss” shall result due to prolonged exposure of a miner to the Noise level more than 90 dB(A). 

  • Horizontal Line
  • Vertical Line
  • Surface of dump
  • None of the above

Angle of repose of waste material dumped is measured from Horizontal Line. 

  • Idle time & Break down time
  • Cubic meters
  • Rate of Loading /Handling of material
  • Only working hours

Productivity of an Excavator in the mining is usually measured in Rate of Loading /Handling of material. 

  • 1 meter
  • 2.5 meters
  • Wheel of biggest Dumper
  • Any suitable height

The height of embankment / bund provided all along the edge of bench in opencast working shall be not less than the height of Wheel of biggest Dumper.

  • 2
  • 3
  • 5

Basically rocks are divided into 3 types.

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