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Tunnelling MCQ Questions & Answers

Tunnelling MCQs : This section focuses on the "Tunnelling". These Multiple Choice Questions (MCQs) should be practiced to improve the Tunnelling skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

Pick up the correct statement regarding drilling a tunnel from the following:

A. Holes are drilled by pneumatically operated rock drills
B. One drill is required for each 4 to 5 m2 force area
C. The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge
D. All of the above.

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Question 2

Which of the following can act as an alternative for blasting?

A. Tunneling
B. Continuous blasting
C. Sequential blasting
D. Fire-setting

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Question 3

Tunneling is required in case of ____________

A. Laying pavement
B. Laying road
C. On ground passage
D. Underground passage

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Question 4

Which method can be adopted in case of rock tunneling?

A. Full face method
B. Benching
C. Tracing
D. Back bearing method

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Question 5

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

A. the grass hopper method
B. the passing track method
C. California crossing method
D. Dixon conveyor method.

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Question 6

The following tunnels were constructed in different countries for different purposes : 1. Emperor Claudius built the first Roman tunnel2. The first highway tunnel was constructed in Hungary3. The first underground railway tunnel was constructed in Great Britain4. The first navigational tunnel was constructed in France.The correct chronological development of these tunnels is:

A. 4 1 3 2
B. 1 4 2 3
C. 2 3 1 4
D. 3 2 4 1

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Question 7

For initial surveys of tunnels, the following activities are involved:1. Marking portal point with concrete pillars on the ground2. Marking tunnel obligatory points on the topographical maps3. Preliminary setting of the tunnel on the topographical Survey of India maps3. Driving lines between the fixed obligatory points.The correct sequence of the activities is :

A. 3 2 4 1
B. 1 2 3 4
C. 4 3 1 2
D. 2 4 3 1

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Question 8

For tunnels exceeding 300 m in length, the grade should be provided below

A. 50% of the ruling gradient
B. 60% of the ruling gradient
C. 75% of the ruling gradient
D. 80% of the ruling gradient.

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Question 9

The line at which the tunnel wall breaks from sloping outward can be given as _________

A. Spring line
B. Oval line
C. Centre line
D. Middle line

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Question 10

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

A. foredrainage
B. dewatering
C. permanent drainage
D. All of the above.

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Question 11

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

A. 0.30 m
B. 0.45 m
C. 0.60 m
D. 0.75 m

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Question 12

Among the following, which can be adopted for providing support for soft strata?

A. Bents of aluminum
B. Bents of iridium
C. Bents of steel
D. Bents of plastic

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Question 13

Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions :

A. Brick lining
B. stone lining
C. timber line
D. cast iron lining

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Question 14

Pick up the mechanical ventilation method used for tunnels from the following:

A. blowing fresh air by ducts to the face of tunnel
B. exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel
C. blowing fresh air and exhausting foul air by ducts
D. all the above.

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Question 15

Which of the following should be considered while aligning a tunnel?

A. Atmospheric conditions
B. Hydrological conditions
C. Climatic conditions
D. Surface limits

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Question 16

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

A. Drilling and mucking can be done simultaneously
B. Benching provides a plateform for working on heading
C. Removal of muck from the heading is very easy
D. None of these.

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Question 17

Railway tunnels, are generally

A. polycentric
B. rectangular
C. parabolic
D. circular

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Question 18

To attain the required shape of the tunnel section, we use :

A. easers
B. trimmers
C. cut holes
D. chisels.

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Question 19

Forepoling method is generally adopted for tunnelling in :

A. soft ground
B. firm ground
C. running ground
D. None of these.

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Question 20

For highways, tunnelling is preferred to if the open cut exceeds :

A. 10 metres depth
B. 15 metres depth
C. 20 metres depth
D. 25 metres depth.

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Question 21

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

A. blasting gelatine
B. special gelatine
C. ammonia dynamite
D. semi-gelatine.

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Question 22

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

A. Full face method
B. Top heading and benching method
C. Drift method
D. All the above.

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Question 23

A steel cylinder which is pushed in the soft soil is determined as ________

A. Jar born
B. Shield
C. Rod
D. Pole

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Question 24

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

A. one opening is provided
B. two openings are provided
C. three openings are provided
D. no opening is provided.

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Question 25

For transferring the tunnel alignment through shafts, we adopt the following steps :1. Hanging two or more plumb lines in the shaft2. Determining the bearing of the plumb lines i.e. plumb plane3. Suspending a 35 kg weight by each plumb line4. Immersing the weights of both the plumb lines in the buckets containing water.The correct sequence of steps is :

A. 1 2 3 4
B. 4 3 2 1
C. l 3 2 4
D. 2 1 4 3

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Question 26

The following operations are required for tunnelling in rocky terrain :1. Removing the foul gases2. Marking the tunnel profile3. Setting up and drilling4. Checking misfire5. MuckingThe correct sequence is :

A. 1 2 3 4 5
B. 2 3 5 4 1
C. 4 2 1 3 5
D. 2 3 1 4 5

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Question 27

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

A. highly fissured
B. poor
C. likely to get seepage of water
D. All of the above.

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Question 28

The following operations are generally employed for tunnelling in hard rock. 1. Removing ground water, 2. Loading holes and firing the explosive3. Setting up and drilling4. Grouting and lining5. Removing muck6. Ventilation and removing explosion dustThe correct sequence is :

A. 3 2 6 5 1 4
B. 3 4 6 1 5 2
C. 4 1 2 3 6 5
D. 5 4 2 1 3 6

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Question 29

Concrete lining is provided concurrently with the driving operation in case of

A. rock terrain
B. soft rock
C. running soil
D. none of these.

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Question 30

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

A. 4.2 m to 4.5 m
B. 4.5 m to 4.8 m
C. 4.9 m to 5.5 m
D. 5.5 m to 5.8 m

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Question 31

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

A. two sections
B. three sections
C. four sections
D. five sections.

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Question 32

The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than

A. 200 particles/cm3
B. 250 particles/cm3
C. 300 particles/cm3
D. 450 particles/cm3

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Question 33

Which method can be adopted if full face excavation is not possible?

A. Back bearing method
B. Plotting
C. Trenching
D. Benching

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Question 34

In case of railways,

A. a detour round the hill is preferred
B. a open cut is preferred
C. tunnelling is preferred
D. All the above.

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Question 35

Which of the following involves in the sequence of rocky strata?

A. Marking profile
B. Placing rocks
C. Improving foul gases
D. Recording values

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Question 36

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

A. 2 m to 4 m
B. 2.5 m to 6 m
C. 4 m to 7 m
D. 5 m to 6 m

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Question 37

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

A. 5.5 m to 5.8 m
B. 5.8 m to 6.2 m
C. 6.7 m to 7.3 m
D. 7.3 m to 7.5 m

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