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VTU Civil Engineering (Semester 6)
Transportation Engg 2
June 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) What are the requirements of rails?
6 M
1 (b) Explain the following:
i) Theories and causes of creep
ii) Types of rail joints
8 M
1 (c) Compare flat footed rails with DH and BH rails.
6 M

2 (a) What are the requirements of a good materials? Mention the different types of ballast used.
6 M
2 (b) Determine the quantity of materials required to construct a 16km long BG rail way track. Assume a sleeper density of m+5 and weight of rail section as 52 kg/m length.
6 M
2 (c) Calculate the maximum permissible train load that can be pulled by a locomotive having 4 pairs of diving wheels, carrying an axle load of 22 tonnes each. The train has to run at a speed of 80 kmph on a straight level B.G track. Also calculate the reduction in speed if the train climbs a gradient of 1 in 150. If the train climbs the gradient with a 4° curve, then what should be the reduction in speed. Take μ=0.166.
8 M

3 (a) List the different types of curves used on railways. Explain the necessity of transition curves.
6 M
3 (b) What is grade compensation on curves? If the ruling gradient is 1 in 150 on a particular section of B.G. track and at the same time a curve of 4° is situate on this ruling gradient. What should be the allowable ruling gradinet?
6 M
3 (c) A 5° curve diverges from a 3° main curve in the layout of a B.G. yard. If the speed of the branch line is restricted to 35 kmph, find out the maximum permissible speed on the main line Allowable cant deficiency is 7.6cm.
8 M

4 (a) Draw a neat sketch of a right hand turnout and show its various comonents.
6 M
4 (b) With a neat sketch, explain the working of semaphore signal.
6 M
4 (c) List the types of yards in railways. Explain marshalling yards and the different types of marshalling yards.
8 M

5 (a) Explain the characteristics of an aircraft which affects which affects the planning and design of airports.
6 M
5 (b) Explain the factors that influence the site selection for an airport.
6 M
5 (c) Draw a neat sketch of an airport with single runway and explain the functions of the component parts.
8 M

6 (a) Explain the various factors which affect the location of exit taxiways.
6 M
6 (b) A taxiway is to be designed for operating Boeing 707-320, which has the following characteristics. Determine the turning radius of the taxiway.
Wheel base = 17.7m
Turning speed = 40 kmph.
Coefficient of friction between tyre and pavement surface = 0.13.
6 M
6 (c) The length of runway under standard conditions is 1700m. The airport site is at an elevation of 260 m. Its reference temperature is 32°C. If the runway is to be constructed with an effective gradient of 0.20 percent, determine the corrected runway length.
8 M

Write short notes on:
7 (a) (i) Tunnel lining
4 M
7 (a) (ii) Tunnel drainage
4 M
7 (b) Explain with a neat sketch, the operation involved in needle beam method of tunnelling in soil.
6 M
7 (c) What is the necessity for ventilation in tunnels? Explain the methods of tunnel ventilation.
6 M

8 (a) Define the terms harbour. Explain various classification of harbours.
6 M
8 (b) What are the factors to be considered while selecting a site for a harbour?
6 M
8 (c) What is a breakwater? Explain the mound type of breakwater with a neat sketch.
8 M

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