Tunnel Engineering

Pick up the correct statement regarding drilling a tunnel from the following:

  • A. Holes are drilled by pneumatically operated rock drills
  • B. One drill is required for each 4 to 5 m2 force area
  • C. The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge
  • D. All of the above
Answer: Option D.
Explanation: 

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

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button
error: Alert: Content is protected !!