The most suitable soil for compressed air tunneling is________________?
The most suitable soil for compressed air tunneling is________________?
A. silt
B. sand
C. clay
D. gravel
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In the construction of Metro Railways, “Cut and Cover” method of construction is suitable in situations listed at________________?
In the construction of Metro Railways, “Cut and Cover” method of construction is suitable in situations listed at________________?Consider the following situations
1. Soil is soft
2. Volume of existing surface traffic on the alignment is heavy
3. Track is at a deeper level
4. Water table is high
A. 1 and 2
B. 1 and 3
C. 1 and 4
D. 2 and 3As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?
As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?A. remains same
B. decreases
C. increases by 2.25 times
D. increases by 3.5 timesIn Belgium method of tunneling _________________?
In Belgium method of tunneling _________________?A. construction of side walls is completed before invert and roof arch are built
B. construction of roof arch is completed before side walls and invert are built
C. construction of invert is completed before side walls and roof arch are built
D. construction of invert and side walls is completed before roof arch is builtThe correct sequence of drilling equipment for increasing size of holes in tunnels is________________?
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 drillIn “full face” method of constructing tunnels, the first operation relates to______________?
In “full face” method of constructing tunnels, the first operation relates to______________?A. removal of bottom portion
B. excavation of one drift in the centre
C. removal of top portion
D. excavation being done along the peripheryWhich of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?A. stone masonry
B. timber
C. cast iron
D. cement concrete