Tunnel Engineering

The correct sequence of drilling equipment for increasing size of holes in tunnels is_____.

  • A. Wagon drill, churn drill, shot drill
  • B. Wagon drill, shot drill, churn drill
  • C. Shot drill, churn drill, wagon drill
  • D. Churn drill, wagon drill, shot drill
Answer: Option A.
Explanation: 

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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