1. In "full face" method of constructing tunnel, the first operation relates to





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MCQ->In "full face" method of constructing tunnel, the first operation relates to....
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MCQ->Consider the following statements with respect to tunnelling methods:1. Full face excavation is suitable for small size tunnel of short length in compact rock. It is not suitable in urban areas.2. Heading and Benching method is suitable for soft rock tunnelling of medium size.3. Drift method is suitable for large tunnels in difficult or incompetent rock.Which of the statements given above are correct ?....
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