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Tunnel Engineering - Interview Questions and Answers

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1. In compressed air tunneling, the volume of free air provided is
A. 6 mJ per second per m2 of face area
B. 6 m3 per minute per m2 of face area
C. 20 m3 per minute per m2 of face area
D. 6 m3 per hour per m2 of face area
Explanation:
2. Consider the following situations. # Soil is soft. # Volume of existing surface traffic on the alignment is heavy. # Track is at a deeper level. # Water table is high. In the construction of Metro Railways, "Cut and Cover" method of construction is suitable in situations listed at
A. 1 and 2
B. 1 and 3
C. 1 and 4
D. 2 and 3
Explanation:
3. Which of the following is not a component of the shield ?
A. propelling jacks
B. liner plate
C. hood
D. tail
Explanation:
4. 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
Explanation:
5. In "full face" method of constructing tunnels, the first operation relates to
A. removal of bottom portion
B. excavation of one drift in the center
C. removal of top portion
D. excavation being done along the periphery
Explanation:
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