Tunnelling MCQs

Tunnelling MCQs

These Tunnelling multiple-choice questions and their answers will help you strengthen your grip on the subject of Tunnelling. You can prepare for an upcoming exam or job interview with these Tunnelling MCQs.
So scroll down and start answering.

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

A.   2.5 m to 6 m

B.   5 m to 6 m

C.   4 m to 7 m

D.   2 m to 4 m

2: The tunnels, the artificial underground passages are constructed for:

A.   Sewerage

B.   Water supply project

C.   All these

D.   Highways

E.   Railways

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

A.   All these

B.   Blowing fresh air and exhausting foul air by ducts

C.   Blowing fresh air by ducts to the face of tunnel

D.   Exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel

4: Pick up the correct statement from the following during tunnel excavation,

A.   Hydrogen sulphide should not be more than 0.001%

B.   Carbon mono-oxide should not be more than 0.01%

C.   Oxygen should not be less than 19.5%

D.   Carbondioxide should not be more than 0.5%

E.   All of these

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

A.   Timber line

B.   Concrete lining.

C.   Stone lining

D.   Brick lining

E.   Cast iron lining

6: In case of railways,

A.   Tunnelling is preferred

B.   All these

C.   A detour round the hill is preferred

D.   A open cut is preferred


 The following operations are generally employed for tunnelling in hard rock.

1. Removing ground water,

2. Loading holes and firing the explosive

3. Setting up and drilling

4. Grouting and lining

5. Removing muck

6. Ventilation and removing explosion dust

The correct sequence is:


5 4 2 1 3 6


3 4 6 1 5 2


4 1 2 3 6 5


3 2 6 5 1 4


The following operations are required for tunnelling in rocky terrain:

1. Removing the foul gases

2. Marking the tunnel profile

3. Setting up and drilling

4. Checking misfire

5. Mucking The correct sequence is:


1 2 3 4 5


2 3 1 4 5


2 3 5 4 1


4 2 1 3 5

9: Which one of the following methods of tunnelling does not require the use of time bearing:

A.   Shield method

B.   Compressed air method

C.   Mechanical tunneler i.e. mole method

D.   All the these.

E.   Linear plate method

10: Railway tunnels, are generally

A.   Circular

B.   None of these.

C.   Polycentric

D.   Rectangular

E.   Parabolic

11: Which one of the following statements is not correct with regard to heading and hench-ing method of tunnelling.

A.   The holes in head and bench are loaded together with explosive for blasting.

B.   Driving of tunnel is done in two portions of its section

C.   After driving the top portion 3 m to 3.5 m holes are drilled into the head and bench.

D.   Driving the top portion is done in advance of the bottom portion.

E.   Firing of head holes is done just before the bench holes are fired.

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

A.   Two sections

B.   Five sections.

C.   Four sections

D.   Three sections

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

A.   Easers

B.   Trimmers

C.   Chisels.

D.   Cut holes

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

A.   4.2 m to 4.5 m

B.   4.9 m to 5.5 m

C.   4.5 m to 4.8 m

D.   5.5 m to 5.8 m

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

A.   6.7 m to 7.3 m

B.   5.8 m to 6.2 m

C.   5.5 m to 5.8 m

D.   7.3 m to 7.5 m

16: 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.   250 particles/cm3

B.   450 particles/cm3

C.   200 particles/cm3

D.   400 particles/cm3

E.   300 particles/cm3

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

A.   No opening is provided.

B.   Two openings are provided

C.   Three openings are provided

D.   One opening is provided

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

A.   All of these

B.   Holes are drilled by pneumatically operated rock drills

C.   The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge

D.   One drill is required for each 4 to 5 m2 force area

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

A.   Full face method

B.   All these

C.   Top heading and benching method

D.   Drift method

20: Which one of the following statements is not correct in respect of setting of an inclined tunnel:

A.   Reference points are constructed at every 300 m.

B.   Reference points are constructed on the roof of tunnels

C.   The level of the invert at the heading is marked by a tape.

D.   None the above.

E.   The alignment is fixed from upper/lower apex point.