A good blast with a good yield is obtained if the cut hole is
1.normal to face
2.inclined at 15° to the face
3. inclined at 30° to the face
4. inclined at 45° to the face
Posted Date:-2022-09-25 06:35:49
A tunnel is found more advantageous as compared to the alternate routes because it
1.avoids interference with surface rights
2. remains free from snow
3.reduces the maintenance cost
4.All the above
Posted Date:-2022-09-25 06:50:02
An overhead track on a large truss frame is required in case of car changer by
1. the passing track method
2.California crossing method
3.Dixon conveyor method
4.the grass hopper method
Posted Date:-2022-09-25 03:10:15
Circular section of tunnels is not suitable for
1. placement of concrete lining
2. tunnels driven by shield method
3.carrying water
4.non cohesive soils
Posted Date:-2022-09-25 02:52:43
Concrete lining is provided concurrently with the driving operation in case of
1.soft rock
2.rock terrain
3.running soil
4.None of these
Posted Date:-2022-09-25 06:20:08
Diverting water entering tunnel is
1.Drainage work during construction
2.Permanent drainage work
3.Predrainage work
4.All the above
Posted Date:-2022-09-25 02:42:29
Drift method of tunneling is used to construct tunnels in
1.self supporting grounds
2.broken grounds
3.soft grounds
4.rock
Posted Date:-2022-09-25 07:08:13
Drift method of tunnelling is used to construct tunnel in
1. broken grounds
2.rocks
3.running ground
4. soft ground
Posted Date:-2022-09-25 02:46:31
Drifters can be used to drill
1.horizontal or up holes
2.horizontal, down or up holes
3. only down holes
4.only up holes
Posted Date:-2022-09-25 07:10:58
First tunnel built in the world was in Babylon, in the year
1.200 AD
2. 600 AD
3.200 BC
4.2000 BC
Posted Date:-2022-09-25 02:36:58
For B.G. single track railway, the height of the tunnel above top of rails should be
1. 5.5 m to 5.8 m
2.5.8 m to 6.2 m
3.6.7 m to 7.3 m
4.7.3 m to 7.5 m
Posted Date:-2022-09-25 06:23:00
For B.G. single track, the section of the tunnel must have a width
1. 4.2 m to 4.5 m
2.4.5 m to 4.8 m
3.4.9 m to 5.5 m
4.5.5 m to 5.8 m
Posted Date:-2022-09-25 03:28:55
For full face method, the excavation to be done generally divided into
1. two sections
2.three sections
3. four sections
4.five sections
Posted Date:-2022-09-25 06:16:56
For highways, tunnelling is preferred to if the open cut exceeds
1.10 metres depth
2.15 metres depth
3.15 metres depth
4.20 metres depth
Posted Date:-2022-09-25 03:07:40
For mucking the method employed is
1.using conveyers
2.hauling on rails
3.hauling on pneumatic tyres
4.all of the above
Posted Date:-2022-09-25 03:17:27
For tunnels exceeding 300 m in length, the grade should be provided below
1.80% of the ruling gradient
2.75% of the ruling gradient
3.60% of the ruling gradient
4. 50% of the ruling gradient
Posted Date:-2022-09-25 02:55:33
Forepoling method is generally adopted for tunneling in
1.firm ground
2.soft ground
3. running ground
4.none of these
Posted Date:-2022-09-25 03:44:51
If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are
1.2 N
2.N + 2
3.2 N + 1
4.2 N + 2
Posted Date:-2022-09-25 06:25:38
In Belgium method of tunneling
1.construction of invert and side walls is completed before roof arch is built
2.construction of invert is completed before side walls and roof arch are built
3.construction of roof arch is completed before side walls and invert are built
4.construction of side walls is completed before invert and roof arch
Posted Date:-2022-09-25 02:51:35
In case of drift method of tunnelling, the drift may be excavated at
1.the centre
2.the side
3.the bottom
4.All of the above
Posted Date:-2022-09-25 07:24:40
In case of tunnels in hilly areas to align tunnel ends use
1.triangulation
2.direst ranging
3.reciprocal ranging
4.any one of the above
Posted Date:-2022-09-25 06:39:24
In compressed air tunneling, the volume of free air provided is
1.6 m3 per minute per m2 of face area
2.6 m3 per second per m2 of face area
3. 6 m3 per hour per m2 of face area
4.20 m3 per second per m2 of face area
Posted Date:-2022-09-25 07:20:12
In the wooden bulk head, used for mucking in steep grade tunnels.
1. no opening is provided
2.one opening is provided
3.two openings are provided
4.three openings are provided
Posted Date:-2022-09-25 07:04:40
In tunnel, unless special provision is made for proper drainage, the gradient should not be more than
1. 2%
2.5%
3. 7%
4.10%
Posted Date:-2022-09-25 06:15:48
Mechanical ventilation method used in tunnels consists of
1. Blowing fresh air
2.Providing exhaust air by ducts
3.Both a and b
4.None of the above
Posted Date:-2022-09-25 02:38:46
Pack grouting with concrete is required between
1.steel lining and concrete lining
2. rock and concrete lining
3.both a and b
4.none of the above
Posted Date:-2022-09-25 06:11:31
Pick up the correct statement from the following during tunnel excavation
1.Oxygen should not be less than 19.5%
2.Carbon monoxide should not be more than 0.01%
3.Carbondioxide should not be more than 0.5%
4.All of the above
Posted Date:-2022-09-25 07:28:14
Pick up the correct statement from the following during tunnel excavation
1.Oxygen should not be less than 19.5%
2.Carbon monoxide should not be more than 0.01%
3.Carbondioxide should not be more than 0.5%
4.All of the above
Posted Date:-2022-09-25 07:28:14
Railway tunnels, are generally
1.parabolic
2.circular
3.polycentric
4.rectangular
Posted Date:-2022-09-25 06:51:50
Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than
1.2 m
2.3 m
3.4 m
4.5 m
Posted Date:-2022-09-25 06:40:44
The correct sequence of drilling equipment for increasing size of holes in tunnels is
1.churn drill, wagon drill, shot drill
2.shot drill, churn drill, wagon drill
3.wagon drill, shot frill, churn drill
4.wagon drill, churn drill, shot drill
Posted Date:-2022-09-25 06:10:09
The drilling pattern in which 3 to 4 converging holes are so directed that they meet at point further is known as
1. Burn cut
2.Fan cut
3.V cut
4.Pyramid cut
Posted Date:-2022-09-25 02:39:52
The explosive recommended for blasting a soft rock
1.Ammonia dynamite
2.Blasting gelatin
3.Special gelatin 9 to 40%
4.Semi gelatin
Posted Date:-2022-09-25 02:32:56
The explosive used in tunnelling is
1. ammonia dynamite
2.semi gelatin
3.blastic gelatin
4.any one of the above
Posted Date:-2022-09-25 02:53:46
The length of the first tunnel built in the world of Babylon in the year 2000 BC was
1. 300 m
2.500 m
3.700 m
4.900 m
Posted Date:-2022-09-25 06:13:21
The length of the needle beam used in needle beam method of tunneling is usually
1.2m to 4 m
2.2.5 m to 6 m
3. 4. 5 m to 6 m
4.6. 5 m to 6 m
Posted Date:-2022-09-25 07:25:42
The method employing steel lined plates and air compressors for driving them is known as
1.Needle beam method
2.Shield method
3.Tunnelling with liner plates
4.None of the above
Posted Date:-2022-09-25 02:35:49
The method in which roof arch is completed before excavating a trench for laying muck track is known as
1.American method
2.Austrian method
3.English method
4.Belgium method
Posted Date:-2022-09-25 02:29:09
The method of draining in the tunnels, is generally known as
1.foredrainage
2.permanent drainage
3. dewatering
4. All of the above
Posted Date:-2022-09-25 07:31:44
The method of lining in tunnel is
1.concrete lining
2.stone masonary lining
3.brick masonry lining
4.All of the above
Posted Date:-2022-09-25 06:37:43
The most commonly adopted pattern of cut holes is
1. V-cut
2. fan cut
3. horizontal wedge cut
4. All of the above
Posted Date:-2022-09-25 07:01:56
The most commonly adopted pattern of cut holes is
1. V-cut
2. fan cut
3. horizontal wedge cut
4. All of the above
Posted Date:-2022-09-25 07:01:56
The most suitable soil for compressed air tunneling is
1. clay
2.sand
3.sitt
4.gravel
Posted Date:-2022-09-25 06:33:56
The tunnels, the artificial underground passages are constructed for
1.highways
2.railways
3.water supply project
4. All of the above
Posted Date:-2022-09-25 03:23:32
To obtain the required shape of the tunnel section, we use
1.trimmers
2.cut holes
3.chisels
4.easers
Posted Date:-2022-09-25 03:26:14
Which of the following is not a component of the shield?
1. tail
2.hood
3. liner plate
4.propelling jacks
Posted Date:-2022-09-25 03:16:18
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions?
1. cast iron
2.cement concrete
3.timber
4.stone masonry
Posted Date:-2022-09-25 07:09:46
Which one of the following is a component of a shield for tunneling?
1.cutting edge
2.stiffener
3.trench plate
4.liner plate
Posted Date:-2022-09-25 02:47:38
Which one of the following is a method of tunneling in firm soft strata?
1. Full face method
2.Top heading and benching
3.Needle beam method
4.Drift method
Posted Date:-2022-09-25 02:43:40
Which one of the following is a method tunnelling in running ground?
1.Top heading and benching method
2.Liner plate method
3.Flying arch method
4.Needle beam method
Posted Date:-2022-09-25 02:41:27
Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
1. tunneling can be continuous and the work can be expedited
2.in this method, it is easy to install timber support
3.in case of excessive water, it is easy to take correct steps
4. it is suitable for construction in unstable rocks
Posted Date:-2022-09-25 03:15:20
Which one of the following is not a drilling pattern adopted in tunnelling?
1.cylinder cut
2.vertical wedge cut
3. fan cut
4. v-cut
Posted Date:-2022-09-25 03:19:36
Which one of the following is not a method of supporting roof and sides in multiple drift method of tunnelling?
1.Austrian method
2.Belgium method
3. Japanese method
4.German method
Posted Date:-2022-09-25 03:21:12
Which one of the following is not a permanent drainage work
1.Concrete ling
2. Grouting with cement chemicals
3. Pumping water
4.) Providing longitudinal drains
Posted Date:-2022-09-25 02:33:56
Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions
1. cast iron lining
2.brick lime
3. stone lining
4.timber line
Posted Date:-2022-09-25 03:05:22
Which one of the following methods is adopted permanent drainage of tunnels
1.provision of longitudinal drains
2. grouting with cement or chemicals
3.concrete lining
4.All of the above
Posted Date:-2022-09-25 06:21:29
Which one of the following methods is generally adopted for tunneling in firm ground
1.drift method
2.top heading and benching method
3. full face method
4.all the above
Posted Date:-2022-09-25 03:08:50
Which one of the following methods of tunneling does not require the use of time bearing.
1.compressed air method
2.linear plate method
3.mechanical tunneler i.e. mole method
4. All of the above
Posted Date:-2022-09-25 07:23:01
Which one of the following methods of tunneling is used for long tunnels at great depths?
1.austrain method
2.army method
3.english method
4.needle beam method
Posted Date:-2022-09-25 06:08:21
Which one of the following statements is not correct for heading and benching method of tunnelling?
1. removal of muck from the heading is very easy
2.drilling and mucking can be done simultaneously
3. benching provides a plateform for working on heading
4.None of these
Posted Date:-2022-09-25 03:24:58
Which one of the following statements is not correct with regard to heading and hunching method of tunnelling.
1.Firing of head holes is done just before the bench holes are fired
2.The holes in head and bench are loaded together with explosive for blasting
3.After driving the top portion 3 m to 3.5 m holes are drilled into the head and bench
4. Driving the top portion is done in advance of the bottom portion
Posted Date:-2022-09-25 06:59:21
Which one of the following tunneling methods is used for laying underground sewers?
1.Army method
2.German method
3.Italian method
4.Needle beam method
Posted Date:-2022-09-25 07:21:46