As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield:
A. increases by 2.25 times
B. increases by 3.5 times
C. remains same
D. decreases
Tunnel engineering
Tunnel engineering MCQs is a specialized field within civil engineering that focuses on the planning, design, construction, and maintenance of tunnels.
A good blast with a good yield is obtained if the cut hole is:
A. inclined at 15° to the face
B. inclined at 30° to the face
C. inclined at 45° to the face
D. normal to face
Circular section of tunnels is not suitable for:
A. unnels driven by shield method
B. placement of concrete lining
C. carrying water
D. non-cohesive soils