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UPSC Civil Service Exam Questions

Q1: Which one of the following methods is generally considered the best for tunnel ventilation ?

A Driving a drift through the tunnel

B 'Blow in' method

C 'Blow out' method

D Combination of 'Blow in' and 'Blow out' methods

ANS:D - Combination of 'Blow in' and 'Blow out' methods

No answer description is available.



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