Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Ballast:
Ballast is the layer of broken stone provided on the formation on which the sleepers rest. The stones are cubical in shape and pass through 50 mm square mesh. The functions of the ballast are:
(a) To distribute the load of traffic to the earthen formation to a safe value.
(b) To act as an elastic bed to absorb the impact of the wheels.
(c) To hold the sleepers firmly in the lateral and longitudinal directions.
(d) To act as a good drainage medium.
(e) To provide a convenient medium to pack the track to the desired levels.
(f) To prevent capillary rise of water which may cause decay/corrosion of sleepers?
(g) To check the growth of vegetation under the track.
The thickness of ballast for a high density BG track is 300 mm, and it is 250 mm for a low density BG track. Figure 4 gives the standard ballast section.
Figure: Standard BG Track Ballast Section
with usual notations the effort lost due to friction is given by A) P-W/V.R B) P×V.R-W C) P-W×V.R D) P+W/V.R
A body is subjected to two harmonic motions as given below : X 1 = 15 sin (wt + 30 0 ) and X 2 = 8 cos (wt + 60 0 ). What harmonic motion should be given to the body to bring
Q. Show Mass energy Relation? Until the time of Einstein, mass and energy were considered as two different physical quantities. But in 1905, with the help of postulates of the
discus the method to finding the width of impeller blades in a rotary air compressor
Q. Show Automation Inspection and Test Plan? Automation Inspection and Test Plan review and Automation Materials Test Results review shall be by Automation Engineering, or by /
tree branch trimmer
Q. Plastic part manufacturing process? Plastic belongs to the family of organic materials. Organic materials are those materials which derived directly from carbon. They consis
Discuss the method of properties, manufacturing and applications of following cutting tool materials: (i) Carbides (ii) Ceramics (iii) Cubic Boron Nitride (CBN) What ar
Explain the principle of virtual work
Grinding Wheels Implicated to be rotated at relatively high rotational velocities within grinding machines, grinding wheels contain a surface of rotation about a central axis.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd