Q. Railway tunnels, are generally

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Q. Pick up the explosive used for tunnelling in soft rocks from the following :

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Q. For B.G. single track, the section of the tunnel must have a width

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Q. Which one of the following statements is not correct for heading and benching method of tunnelling ?

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Q. The difference of heights of the tunnels above rail tops of BG and MG tracks is kept

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Q. In case of drift method of tunnelling, the drift may be excavated at

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Q. A tunnel is found more advantageous as compared to the alternate routes because it:

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Q. For B.G. single track railway, the height of the tunnel above top of rails should be

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Q. Which one of the following methods is generally used for the layout of the muck-car tracks

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Q. For transferring the tunnel alignment through shafts, we adopt the following steps :

1. Hanging two or more plumb lines in the shaft
2. Determining the bearing of the plumb lines i.e. plumb plane
3. Suspending a 35 kg weight by each plumb line
4. Immersing the weights of both the plumb lines in the buckets containing water.

The correct sequence of steps is :

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Q. 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
4. Driving lines between the fixed obligatory points.

The correct sequence of the activities is :

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Q. For full face method, the excavation to be done is generally divided into

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Q. The tunnels, the artificial underground passages are constructed for :

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Q. Which one of the following methods is generally adopted for tunnelling in firm ground

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Q. An overhead track on a large truss frame is required in case of car changer by

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Q. Pick up the correct statement from the following:

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Q. The length of the needle beam used in needle beam method of tunnelling is usually

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Q. High pressure grouting is generally restored for concreting in the lining if the rock strata is:

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Q. For hauling muck from the tunnel, the following type of muck-car is used :

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Q. Which one of the following methods is adopted for permanent drainage of tunnels :

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