Q250
What is the primary purpose of a collar level in shaft development?
A.
Provide electrical connection
B.
Control dust
C.
Provide horizontal access from shaft
AnswerD.
Anchor shaft guides
Answer: Option C
Solution
Answer: Option C
Solution:
Collar level is the first horizontal opening from a vertical shaft.The correct answer is: Provide horizontal access from shaftActs as a hub for early excavation or logistics.Often used during sinking and construction stages.