1. It's a coal mining extraction method where simultaneous development and extraction is done and parallel faces are separated by a series of fender block of coal. The mining is known as
2. 'Loop-take-up' arrangement is associated with
3. The maximum voltage for handheld portable apparatus used in underground mines is
4. Which of the following actually determines the periodic weighting length in long wall working?
5. Side Discharge Loader (SDL) is a
6. Why fleet angle is limited to 1.5°?
7. The suitable method of mining a 2 m thick strong sulphide ore deposit within strong wall rocks dipping at 18° and occurring at 60 m below the surface is
8. Which of the following is mainly considered for deciding size of panel in depillaring operation
9. In any underground mining methods cut, drill and blast combined known as
10. Which types of detonators are recommended to use with Permitted explosives during blasting off the solid?
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