- 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
- 6
Basically rocks are divided into 3 types.
- 100
- 90
- 80
- 6
In Float or other similar deposit worked by manually on a sloping face, the face shall be benched and sides sloped at an angle of not more than 6 degrees from the horizontal axis in opencast mine workings.
- Mining
- Prospecting
- Exploitation
- None of above
Searching for ore is called Prospecting.
- OEM
- Abroad
- Local
- Indigenous
- All above
Indigenous Manufacturers should be encouraged to manufacture necessary equipment’s as per 11th National Safety Conference
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