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This question belongs to Mining Engineering Mine Supports And Strata Control

Mine Supports and Strata Control

?

Visual test is carried out if the roof is upto . . . . . . . . m from strong focussed beam of light.

A) 2 m B) 3 m C) 4 m D) 5 m

Answer & Solution

Correct Answer: Option D

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Question posted by Examveda

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