What is the primary function of a portal in mining?
A. Explosive storage
B. Shaft lining
C. Surface entry to an adit
D. Water drainage
Answer: Option C
Solution (By Examveda Team)
Portal is the entrance to an adit or tunnel.The correct answer is: Surface entry to an aditIt connects the surface to underground workings in horizontal or inclined entries.It must be stable and often reinforced.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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