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Tunnelling
To attain the required shape of the tunnel section, we use :
easers
trimmers
cut holes
chisels.
Correct Answer:
trimmers
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Tunnelling
High pressure grouting is generally restored for concreting in the lining if the rock strata is:
The most commonly adopted pattern of cut holes is :
For highways, tunnelling is preferred to if the open cut exceeds :
The cut of a tunnel face is shown in given figure. This is called
The tunnels, the artificial underground passages are constructed for :
The length of the needle beam used in needle beam method of tunnelling is usually
For hauling muck from the tunnel, the following type of muck-car is used :
In case of drift method of tunnelling, the drift may be excavated at
Which one of the following methods is generally used for the layout of the muck-car tracks
Which one of the following methods of tunnelling does not require the use of time bearing :
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