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2020 011724

B.Tech 7th Semester Exam., 2020

Time 3 hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Questions

Q1

Choose the correct answer of the following (any seven) :

a)

Which of the following turnouts is most commonly used for goods train on Indian Railways?

a)

1 in 8128\frac{1}{2}

b)

1 in 12

c)

1 in 16

d)

1 in 20

b)

The height of the centre of arm of a semaphore signal above the ground is

a)

5.5 m

b)

6.5 m

c)

7.5 m

d)

8.5 m

c)

The masonry arch bridge constructed in fourth seismic zone should have span

a)

not less than 10 m

b)

not more than 5 m

c)

not more than 10 m

d)

between 10 to 15 m

d)

The impact factor for all gauges of rail bridges should not exceed

a)

0.85

b)

0.50

c)

1.00

d)

0.35

e)

Howrah bridge (Rabindra Setu) is a

a)

cantilever-suspension bridge

b)

cable-stayed bridge

c)

suspension bridge

d)

continuous bridge

f)

If GG is gauge in metres, VV is speed of trains in km/hour and RR is radius of a curve in metres, the equilibrium super-elevation is

a)

GV2/RGV^2 / R

b)

GV2/17RGV^2 / 17R

c)

GV2/127RGV^2 / 127R

d)

GV2/130RGV^2 / 130R

g)

The slipping of driving wheels of locomotives on the rail surface causes

a)

wheel burns

b)

hogging of rails

c)

scabbing of rails

d)

corrugation of rails

h)

Weight and cross-section of the rails are decided on

a)

gauge of tracks

b)

speed of trains

c)

spacing of sleepers

d)

All of the above

i)

Rail section is generally designated by its

a)

total weight

b)

total length

c)

weight per metre length

d)

area of its cross-section

j)

In India, metre gauge permanent way was adopted in

a)

1855

b)

1860

c)

1866

d)

1871

[14 Marks]
Q2

Answer the following:

a)

In a 5∘5^\circ track diverges from a main curve of 3∘3^\circ in an opposite direction in a layout of a BG yard. If the speed of the branch line is restricted 35 kmph, determine the restricted speed on the main line.

[8 Marks]
b)

How the maximum permissible speed of a train is determined on a curved railway track in India?

[6 Marks]
[14 Marks]
Q3

Answer the following:

a)

What are the different types of station yards? Explain the working of anyone with the help of the neat sketch.

[7 Marks]
b)

How the railway stations are classified? What are the important factors to be considered while selecting a suitable site for railway station?

[7 Marks]
[14 Marks]
Q4

Answer the following:

a)

State the parameter to considered while proposing type of bridges.

[7 Marks]
b)

What are the causes of development of longitudinal forces? Explain the provision made for the longitudinal forces in a design of bridges in India.

[7 Marks]
[14 Marks]
Q5

Answer the following:

a)

What is meant by tilting of caissons? What are its causes? How can a tilted caissons be brought in correct position?

[7 Marks]
b)

Write an explanatory note on the rigid frame bridges.

[7 Marks]
[14 Marks]
Q6

Answer the following:

a)

How the signals are classified? Explain clearly the location and the application of the following Railway signals : Outer signal, home signal, starter signal, advance starter signal, point indicator

[8 Marks]
b)

Illustrate the various types of rail failure with sketches.

[6 Marks]
[14 Marks]
Q7

Differentiate between the following :

a)

U-abutment and T-abutment

[3.5 Marks]
b)

Cut water and ease water

[3.5 Marks]
c)

Cylinder pier and solid pier

[3.5 Marks]
d)

Three-hinged arch and fixed arch

[3.5 Marks]
[14 Marks]
Q8

Answer the following:

a)

What is the purpose of providing machine yard? What are the points to be considered in the design of marshalling yard? Also write the main features of marshalling yard.

[9 Marks]
b)

State various types of resistance appearing due to speed of train.

[5 Marks]
[14 Marks]
Q9

Answer the following:

a)

What are the various characteristics of the aircraft to be studied for airport design? Write a brief note.

[7 Marks]
b)

What is wind rose diagram? Explain the procedure of determining the runway orientation.

[7 Marks]
[14 Marks]
2019 011724

B.Tech Examination, 2019

Time 3 hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Questions

Q1

Choose the correct answer (any seven) :

a)

On Indian Railways, number of a crossing is defined as

a)

sine of angle of crossing

b)

cosine of angle of crossing

c)

tangent of angle of crossing

d)

contingent of angle of crossing

b)

If nn is length of a rail in metres, the number of sleepers per rail length generally varies from

a)

nn to (n+2)(n + 2)

b)

(n+2)(n + 2) to (n+4)(n + 4)

c)

(n+3)(n + 3) to (n+6)(n + 6)

d)

(n+4)(n + 4) to (n+5)(n + 5)

c)

The rails get out of their original positions due to insufficient expansion gap. This phenomenon is known

a)

hogging

b)

buckling

c)

creeping

d)

None of the above

d)

The standard dimension of a wooden sleeper for MG railway track is

a)

2.74 m×25 cm×13 cm2.74 \text{ m} \times 25 \text{ cm} \times 13 \text{ cm}

b)

1.83 m×20 cm×11 cm1.83 \text{ m} \times 20 \text{ cm} \times 11 \text{ cm}

c)

1.52 m×15 cm×10 cm1.52 \text{ m} \times 15 \text{ cm} \times 10 \text{ cm}

d)

1.75 m×20 cm×12 cm1.75 \text{ m} \times 20 \text{ cm} \times 12 \text{ cm}

e)

For even distribution of load through ballast, load dispersal is assumed as

a)

30° to the vertical

b)

45° to the vertical

c)

60° to the vertical

d)

None of the above

f)

In the design of piers, the water pressure to be considered is

a)

static pressure

b)

dynamic pressure

c)

impact due to cross current

d)

All of the above

g)

For a major bridge usually, the type of foundation is

a)

grillage foundation

b)

spread foundation

c)

well foundation

d)

caisson foundation

h)

Which one of the following is not a type of culvert?

a)

Pipe culvert

b)

Box culvert

c)

Through culvert

d)

Slab culvert

i)

Deep cast bearings are suitable up to _________ spans.

a)

6 m6 \text{ m}

b)

12 m12 \text{ m}

c)

12 m to 20 m12 \text{ m} \text{ to } 20 \text{ m}

d)

20 m to 30 m20 \text{ m} \text{ to } 30 \text{ m}

j)

If a rocker and roller bearing is provided at one end of a bridge girder, then the other end will be

a)

fixed end

b)

simple support

c)

free end

d)

rocker bearing

[14 Marks]
Q2

Answer the following:

a)

Explain what is meant by crossing angle and crossing number, and describe the three methods of calculating the crossing angle.

[7 Marks]
b)

Write a short note on diamond crossing with double slips.

[7 Marks]
Q3

Answer the following:

a)

State the requirements of an ideal fastening connecting rail and sleeper.

[7 Marks]
b)

Discuss briefly the cause and remedies of creep of rails.

[7 Marks]
Q4

Answer the following:

a)

What are the general requirements to be fulfilled by a rail joint? Enumerate different types of rail joints.

[7 Marks]
b)

Write short notes on the following : (i) Length of rail (ii) Corrugated rail

[7 Marks]
Q5

Answer the following:

a)

Write in short on the following : (i) Cant deficiency (ii) Degree of a curve and its value for unrestricted speed for different gauges

[7 Marks]
b)

What is meant by the grade or gradient of a railway track? Explain the following terms in this connection : (i) Ruling gradient (ii) Pusher grade (iii) Momentum grade

[7 Marks]
Q6

Answer the following:

a)

What are the functions of a signal in respect of railway operation?

[7 Marks]
b)

Find out the maximum scour depth for a straight stream flow conditions for a bridge site if design discharge is 650 m3650 \text{ m}^3 per second and mean diameter of soil bed particle is 0.6 mm0.6 \text{ mm}.

[7 Marks]
Q7

Allowing for a cant deficiency of 7.5 cm7.5 \text{ cm}, what superelevation should be provided on a 2-degree curve on BG track corresponding to a speed of 100 km/hr100 \text{ km/hr}? What should be the length of transition if 10th gradient is not to exceeded 1 in 1000?

[14 Marks]
Q8

Define the following :

a)

Abutment

b)

Pier

c)

Wing wall

d)

Cut water

e)

Cylinder pier

f)

Pile bent

g)

Tee abutment

[14 Marks]
Q9

Answer the following:

a)

Name different characteristics of aircrafts. How do they affect the planning and design of airport?

[7 Marks]
b)

Enumerate various factors which you would keep in view while selecting a suitable site for an airport.

[7 Marks]
2018 011724

B.Tech Examination, 2018

Time 3 hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Questions

Q1

Choose the correct answer of the following (any seven) :

a)

The type of spike used for fixing chairs of bull headed rails to wooden sleepers is

a)

dog spike

b)

rail screw

c)

elastic spike

d)

round spike

b)

Composite sleeper index is the index of

a)

hardness and strength

b)

strength and toughness

c)

toughness and wear resistance

d)

wear resistance and hardness

c)

Creep is the

a)

longitudinal movement of rail

b)

lateral movement of rail

c)

vertical movement of rail

d)

difference in level of two rails

d)

The main function of a fishplate is

a)

to join the two rails together

b)

to join rails with the sleeper

c)

to allow rail to expand and contract freely

d)

None of the above

e)

Two important constituents in the composition of steel used for rail are

a)

carbon and silicon

b)

manganese and phosphorous

c)

carbon and manganese

d)

carbon and sulphur

f)

A bridge of more than _________ span is treated as long span bridge.

a)

30 m

b)

60 m

c)

90 m

d)

120 m

g)

Movable bridges are built across

a)

streams

b)

rivers

c)

channels

d)

dry valley

h)

Width and height of kerbs on bridges are generally _________ respectively.

a)

600 mm×225 mm600 \text{ mm} \times 225 \text{ mm}

b)

450 mm×200 mm450 \text{ mm} \times 200 \text{ mm}

c)

225 mm×600 mm225 \text{ mm} \times 600 \text{ mm}

d)

200 mm×450 mm200 \text{ mm} \times 450 \text{ mm}

i)

Which one of the following is not the correct statement? Bridge site

a)

be narrow

b)

should not possess high banks

c)

be at reasonable proximity to the direct alignment of road

d)

be geologically sound

j)

The cross-section of a pier may be

a)

rectangular

b)

with triangular edges towards upstream and downstream sides

c)

with curved faces on upstream and downstream sides

d)

All of the above

[14 Marks]
Q2

What are different gauges in India? For what specific reasons were different gauges adopted initially? Would you advocate one uniform gauges throughout the country? Give reasons.

[14 Marks]
Q3

Answer the following:

a)

What are the functions of ballasts? Sketch a typical section of a meter gauge track concrete sleeper and explain all related terms.

[7 Marks]
b)

Explain what is meant by tilting of rails and state the advantages derived from tilting.

[7 Marks]
Q4

Answer the following:

a)

Differentiate between— (i) reception and departure signals; (ii) semaphore and warner signal.

[7 Marks]
b)

Define a railway yard. Give the classifications of yards based on the different uses. Also indicate briefly the salient features function in ideal locations of each.

[7 Marks]
Q5

Answer the following:

a)

Explain the object of providing a transition curve and the essential requirement of ideal one.

[8 Marks]
b)

What should be equilibrium cant on a BG line curve of 5 degrees for an average speed of 60 km/hr60 \text{ km/hr}?

[6 Marks]
Q6

Answer the following:

a)

The ruling gradient on a BG track is 1 in 200. With particular reference to a 4-degree curve of this track, explain clearly grade compensation on curve.

[7 Marks]
b)

Explain equilibrium speed and cant deficiency.

[7 Marks]
Q7

Answer the following:

a)

What preliminary data should be collected and analyzed by engineer in charge for the investigation of a bridge site?

[7 Marks]
b)

Flood discharge under a bridge is 750 m3/sec750 \text{ m}^3\text{/sec}. The bridge site is at right angled bend. Assuming Lacey's silt factor for riverbed as 0.850.85, calculate the maximum scour.

[7 Marks]
Q8

Answer the following:

a)

Enumerate various types of bridges with the fixed span superstructures.

[7 Marks]
b)

What are the precautions to be taken during the construction of a wing wall?

[7 Marks]
Q9

Answer the following:

a)

Explain any four factors which influence location of any airport.

[7 Marks]
b)

State the classification of airport according to ICAO.

[7 Marks]
2015 011724

B.Tech 7th Semester Exam., 2015

Time 3 hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Questions

Q1

Choose the correct answer of the following (any seven) :

a)

One degree of curve is equivalent to ________ (where RR is radius of curve in m).

a)

1600/R1600/R

b)

1700/R1700/R

c)

1750/R1750/R

d)

1600R1600R

b)

Dog spikes are used for fixing rail to the

a)

wooden sleepers

b)

CST-9 sleepers

c)

steel trough sleeper

d)

concrete sleepers

c)

Gauge is the distance between

a)

centre-to-centre of rails

b)

running faces of rails

c)

outer faces of rails

d)

None of the above

d)

Sleeper density in India is normally kept as ________ (where MM is rail length in metre).

a)

M+2M + 2 to M+7M + 7

b)

MM to M+2M + 2

c)

M+5M + 5 to M+10M + 10

d)

MM

e)

The grade compensation on a 4∘4^\circ curve on a BG railway track is

a)

0.20%

b)

0.16%

c)

0.12%

d)

0.08%

f)

As per ICAO recommendation, minimum width of safety area for instrumental runway should be

a)

78 m

b)

150 m

c)

300 m

d)

450 m

g)

The height of parapet or handrails on a highway bridge is not less than

a)

1 m

b)

1.5 m

c)

2 m

d)

2.5 m

h)

The angle of bridge crossing-over a channel should not exceed

a)

2212∘22\frac{1}{2}^\circ

b)

30∘30^\circ

c)

60∘60^\circ

d)

45∘45^\circ

i)

A bridge designed to allow normal floods to pass through its vents but allowed to be over topped during floods is called

a)

submersible bridge

b)

seasonal bridge

c)

underbridge

d)

fair-weather bridge

j)

A temporary suspension bridge in which the roadway rests directly on the suspension cables and consists of wooden cables is called

a)

temporary bridge

b)

ramp bridge

c)

temporary suspension bridge

d)

side bridge

[14 Marks]
Q2a

What are the different modes of transport? Compare rail transport with road transport.

[7 Marks]
Q2b

Describe in brief the basic requirements of an ideal alignment of a railway track.

[7 Marks]
Q3a

What do you understand by widening of gauge on curves?

[4 Marks]
Q3b

Two high-level platforms are to be provided on the inside as well as the outside of a 2∘2^\circ curve on a BG track with a superelevation of 100 mm. What should be the required extraclearances for these platforms, both on the inside and the outside of the curve, be? (Length of bogie =21340 mm= 21340\text{ mm}, c/c bogie distance =14785 mm= 14785\text{ mm}, height of platform $= 840\text{ mm}$).

[10 Marks]
Q4a

What are the purposes of a railway station?

[6 Marks]
Q4b

A crossover is laid between two BG straight tracks placed at a distance of 5 m c/c. Calculate the (i) overall length, (ii) radius of the curved lead and (iii) lead distance. Heel divergence of 1 in 12 crossing =133 mm= 133\text{ mm}.

[8 Marks]
Q5a

What is superelevation? Why is it necessary to provide superelevation on the curves of a railway track?

[6 Marks]
Q5b

A BG branch line track takes off a contrary flexure through a 1 in 12 turnout from a main line of a 3∘3^\circ curvature. Due to the turnout, the maximum permissible speed on the branch line is 30 kmph. Calculate the negative superelevation to be provided on the branch line track and the maximum permissible speed on the main line track.

[8 Marks]
Q6a

Explain any four factors which influence location of an airport.

[7 Marks]
Q6b

State the classification of airports according to ICAO.

[7 Marks]
Q7a

What do you mean by sinking and tilting of wells?

[7 Marks]
Q7b

What are the bases of selection of depth of well foundation for a bridge?

[7 Marks]
Q8

How would you estimate the maximum scour depth for any bridge pier?

[7 Marks]
Q8b

The following are the costs of one pier and one superstructure span of multiple span bridge for various span lengths. The cost of superstructure span excludes the cost of railways and flooring system. Calculate the economic span : Span (in metres): 4, 8, 12, 15 Superstructure cost (in Rs): 1,700, 7,000, 16,000, 24,500 Substructure cost (in Rs): 22,200, 23,200, 23,000, 23,600

[7 Marks]
Q9a

Discuss briefly the characteristics of an ideal site for a bridge.

[7 Marks]
Q9b

Name the different types of loadings used for designing a bridge. Discuss IRC class AA loading in brief.

[7 Marks]

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