36. The method of draining in the tunnels, is generally known as
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37. Which one of the following methods is adopted for permanent drainage of tunnels :
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38. Pick up the mechanical ventilation method used for tunnels from the following
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39. For hauling muck from the tunnel, the following type of muck-car is used :
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40. In the wooded bulk-head, used for mucking in steep grade tunnels,
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41. Which one of the following methods is generally used for the layout of the muck-car tracks
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42. An overhead track on a large truss frame is required in case of car changer by
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