1. The tunnels, the artificial underground passages are constructed for
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2. The following tunnels were constructed in different countries for different purposes : 1. Emperor Claudius built the first Roman tunnel 2. The first highway tunnel was constructed in Hungary 3. The first underground railway tunnel was constructed in Great Britain 4. The first navigational tunnel was constructed in France. The correct chronological development of these tunnels is:
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3. For highways, tunnelling is preferred to if the open cut exceeds :
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4. In case of railways,
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5. A tunnel is found more advantageous as compared to the alternate routes because it :
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6. For initial surveys of tunnels, the following activities are involved : 1. Marking portal point with concrete pillars on the ground 2 Marking tunnel obligatory points on the topographical maps 3. Preliminary setting of the tunnel on the topographical Survey of India maps 3. Driving lines between the fixed obligatory points. The correct sequence of the activities is :
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7. Pick up the correct statement from the following :
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