Civil Engineering MCQs

Page No. 121

In Belgium method of tunneling _________________?


aconstruction of side walls is completed before invert and roof arch are built

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bconstruction of roof arch is completed before side walls and invert are built

✓


cconstruction of invert is completed before side walls and roof arch are built

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dconstruction of invert and side walls is completed before roof arch is built

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Drift method of tunnelling is used to construct tunnels in__________________?


asoft grounds

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brock

✓


cself supporting grounds

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dbroken grounds

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View Answer rock

Which one of the following is a component of a shield for tunnelling ?


a liner plate

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btrench jack

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cstiffener

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dcutting edge

✓


View Answer cutting edge

Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?


a It is suitable for construction in unstable rocks

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b In this method, it is easy to install timber support

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cTunnelling can be continuous and the work can be expedited

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dIn case of excessive water, it is easy to take correct steps

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What is the correct sequence of the following events in rock tunnelling?


amarking tunnel profile

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bloading explosives and blasting

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cchecking misfire

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dAll of them

✓


View Answer All of them

Which of the following methods of tunneling is used for long tunnels at great depths ?


aArmy method

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bNeedle beam method

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cAustrian method

✓


dEnglish method

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View Answer Austrian method

The most suitable soil for compressed air tunneling is________________?


a silt

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bsand

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c clay

✓


dgravel

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View Answer clay

Which one of the following tunnelling methods is used for laying under ground sewers ?


aNeedle beam method

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bArmy method

✓


cGerman method

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dItalian method

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View Answer Army method

Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?


astone masonry

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btimber

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ccast iron

✓


dcement concrete

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View Answer cast iron

In compressed air tunneling, the volume of free air provided is______________?


a6 mJ per second per m2 of face area

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b6 m3 per minute per m2 of face area

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c20 m3 per minute per m2 of face area

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d 6 m3 per hour per m2 of face area

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