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Tunnel Engineering MCQ

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

  • A0.30 m
  • B0.45 m
  • C0.60 m
  • D0.75 m
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Correct Answer : (C)

0.60 m
Explanation:

2.The correct sequence of drilling equipment for increasing size of holes in tunnels is

  • AWagon drill, churn drill, shot drill
  • BWagon drill, shot drill, churn drill
  • CShot drill, churn drill, wagon drill
  • DChurn drill, wagon drill, shot drill
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Correct Answer : (A)

Wagon drill, churn drill, shot drill
Explanation:

3.Which one of the following is a component of a shield for tunneling?

  • ALiner plate
  • BTrench jack
  • CStiffener
  • DCutting edge
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Correct Answer : (D)

Cutting edge
Explanation:

4.Which one of the following methods is adopted for permanent drainage of tunnels?

  • AProvision of longitudinal drains
  • BContinuous open drains
  • CConcrete lining
  • DAll the above
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Correct Answer : (D)

All the above
Explanation:

5.The advantages of providing a pair of tunnels as compared to only one large highway tunnel is

  • AEconomy in cost of construction
  • BAvoidance of head on collisions
  • CProvision of separate exit and entrance of two traffic streams
  • DAll the above
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Correct Answer : (D)

All the above
Explanation:

6.In Belgium method of tunneling

  • AConstruction of side walls is completed before invert and roof arch are built
  • BConstruction of roof arch is completed before side walls and inverts are built
  • CConstruction of invert is completed before side walls and roof arch are built
  • DConstruction of invert and side walls is completed before roof arch is built
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Correct Answer : (B)

Construction of roof arch is completed before side walls and inverts are built
Explanation:

7.A good blast with a good yield is obtained if the cut hole is

  • ANormal to face
  • BInclined at 45° to the face
  • CInclined at 15° to the face
  • DInclined at 30° to the face
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Correct Answer : (B)

Inclined at 45° to the face
Explanation:

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

  • A5.5 m to 5.8 m
  • B5.8 m to 6.2 m
  • C6.7 m to 7.3 m
  • D7.3 m to 7.5 m
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Correct Answer : (C)

6.7 m to 7.3 m
Explanation:

9.Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than

  • A2 m
  • B3 m
  • C4 m
  • D5 m
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Correct Answer : (B)

3 m
Explanation:

10.In the wooded bulk-head, used for mucking in steep grade tunnels

  • AOne opening is provided
  • BTwo openings are provided
  • CThree openings are provided
  • DNo opening is provided
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Correct Answer : (B)

Two openings are provided
Explanation:

11.The method of draining in the tunnels, is generally known as

  • AForedrainage
  • BDewatering
  • CPermanent drainage
  • DAll of the above
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Correct Answer : (D)

All of the above
Explanation:

12.Railway tunnels are generally

  • APolycentric
  • BRectangular
  • CParabolic
  • DCircular
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Correct Answer : (A)

Polycentric
Explanation:

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

  • A2 m to 4 m
  • B2.5 m to 6 m
  • C4 m to 7 m
  • D5 m to 6 m
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Correct Answer : (D)

5 m to 6 m
Explanation:

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

  • AHighly fissured
  • BPoor
  • CLikely to get seepage of water
  • DAll of the above
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Correct Answer : (D)

All of the above
Explanation:

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