The nominal size of ballast used for points and crossings is a) 25 mm b) 40 mm c) 50 mm d) 10mm Ans: a. 26 Stresses in Ballast The transmission of the pressure from the sleepers to the ballast depends upon the elastic properties of the sleepers, degree of compaction and the nature of the ballast bed. Bigger cess and greater section of sleeper with longer sleeper length will result in decreased pressure on ballast and formation. Figure 5 shows the maximum vertical deflection, taken at the midpoint of each bearer, with a single pass of the coupled locomotive load. 46. 25 mm B. The nominal size of ballast used for points and crossings is a ) 25 mm b ) 40 mm c ) 50 mm d ) 10mm. 25 mm B. Design Distribution Box of one House and Calculation of Size of Main ELCB and branch Circuit MCB as following Load Detail. Point and Crossings are peculiar arrangement used in permanent way (railway track) to guide the vehicle for directional change. Another type of concrete The special bent form of the check rails does not allow the wheel to be guided on the entire length of the crossing. Rail Switches and Crossings. 24 . In the past, ballast of 5cm nominal size was extensively used, and smaller ballast of 4cm - 2.5cm was used for iron or steel sleepered track, points, etc. Regular crossings have a slope of 1:9 and are no longer fitted without swing nose crossings in tracks with a maximum speed of over 100 km/h . Download : Download high-res image (845KB) Download : Download full-size image; Fig. Share. The plates are held in position by tie-bar. They also have the disadvantage that they cannot be cut to size for turnouts and special trackwork. a) 25 mm b) 40 mm c) 50 mm d) 10 mm Ans: a. The particle size distribution curves of the sub-ballast and ballast materials are shown in Fig. 30. The plates are provided with projecting ribs in the bottom to provide a grip in the ballast for lateral stability. TM/HM/T-28/370 rev. The size of ballast used on Indian railways under points and crossings is 25 mm. The nominal size of ballast used for points and crossings is a) 25 mm b) 40 mm c) 50 mm … Views . Their first use on a main line railway was by the Reading Company in … 40 mm C. 50 mm D. 10mm. Stiffners are provided at the top of the plate to increase the strength. Other railroads may use a single u value. Using a non-ballasted coil would mean that you are running a 12v coil on a 9v feed, resulting in a weak spark. Development of new technologies for replacement Grant Agreement number: 285121 SST.2011.5.2-6. The spacing of concrete sleepers is about 25% greater than wooden sleepers. 64 . 7B134D16-2C29-496A-8427-C83D39517D94.jpeg - Quiz Final Paper Course:CET-408 The nominal size of ballast used for points and crossings is 01 25mm O2 50mm Solved examples with detailed answer description, explanation are given and it would be easy to understand - … An initial analysis is carried out to determine the maximum deflection under the said design train loading. Concrete sleepers were first used on the Alford and Sutton Tramway in 1884. In fact, at very high speeds, the current may not reach a level high enough to provide sufficient spark, and the engine will begin to miss. Points (switch rails or point blades) are the movable rails which guide the wheels towards either the straight or the diverging track. Their purpose is to derail any train running back without authority or out of control. You can however use such coils provided you remove the ballast resister. Version Number: 2.9 Date Reviewed: 26 Jun 20 Page 5 of 48 5. The Following Section consists Multiple Choice Questions on Railways. Crossings with a flatter angle than 1:9, are constructed with swing nose crossings. Score. 40 mm C. 50 mm D. 10mm. 25 . 23 . The maximum speed at which the train needs to travel in order to maintain the time-table schedule, if running on time. At higher speeds, the points open before the current has time to reach this maximum level. Ballast size for under switches and crossings = 2.54 cm. Broadly point and crossing assembly consists of three main components namely Point, Lead and Crossing element.A point consists of one pair of tongue rails and Stock Rails with necessary fittings.Crossing is a device in the form of V-piece introduced in … The check rail end opening should be flared, and have at least 80 mm clearance to the Points and Crossings: an alternative abbreviation for S and C (Switches and Crossings). pedestrian crossing points As an integral part of the pedestrian network, crossings should meet the same minimum standards as through routes on the footpath, especially in: • the maximum permissible crossfall • maintaining adequate overhead clearances and protrusions • the surface standard (stable and firm, and slip resistant even when wet) Mcq Added by: Muhammad Bilal Khattak. A concrete sleeper can weighs up to 320 kg (700 lbs) compared with a wooden sleeper which weighs about 100 kg or 225 lbs. View the step-by-step solution to: Question. A ballast coil should read around 1.5 Ohms or around 6 volts (maximum 3.4 Ohms is ideal for our systems) Which coil should I use if my car has a ballast resistor? 66 . At points and crossings, the total number of sleepers for 1 in 12 turnouts in Broad Gauge is a) 51 b) 62 c) 70 d) 78 Ans: c 48. Layout of corduroy surface at level crossings . This is the civil engineering questions and answers section on "Railways Section 4" with explanation for various interview, competitive examination and entrance test. Size selected would be based on accuracy of flood estimate. cp-ts-963 issue: 1 date: 04/09/07 page: 2 of 90 (gauge) The section of ballast layer consists of depth of ballasts under the sleepers and the width of the ballasts layer. The nominal size of ballast used for points and crossings is_____? 135. code of practice - volume two - train system [cp2] transadelaide infrastructure services part 13: points and crossings doc. The nominal size of ballast used for points and crossings is. The ballast layer is 0.15m-0.25m thick on most lines but is up to 0.3-0.35m in newer trackwork, especially for high-traffic lines with prestressed concrete sleepers. a) for points and crossings in the lead portion b) with wooden sleepers at locations where creep is likely to be developed c) on all joints and curves d) on all the above Ans: a. 62 . 39 . Typically 57.5mm x 30mm in size, on cardboard about 0.8mm thick. For example, Spring u may be used for rail bending and ballast depth, but Winter u used for rail seat forces. Posted on by . Layout of platform edge (off street) warning surface . A. A pair of sprung trailing points usually located in gradients steeper than 1 in 260. Note that TW must be greater than 10.1' for outlet control to govern for 54" pipe flowing 180 c.f.s. 47. no. In ordinary conversation, it is common to use the word “switch” when referring to a “turnout,” which is technically incorrect. If 180 c.f.s. Width of ballast section for Broad Gauge is a) 1.83 m b) 2.25 m c) 3.35 m d) 4.30 m Ans: c 49. Layout of guidance path surface at a "T" junction and at . Posted in RAILWAY ENGINEERING Questions. In this situation, the maximum permissible speed is determined for a cant deficiency less than 100 mm, but gives a higher value of the maximum permissible speed. 1. ... General term for points, crossings, and other devices that allow a section of track to connect to or cross another track. The ballast samples were prepared following the Australian Standard AS 2758.7:2015 , having d min = 13.2 mm, d max = 53 mm, d 50 = 37.5 mm, and e 0 = 0.76. The typical aggregate size of ballast in practice is anywhere between 13 mm and 65 mm. This points out that accuracy in estimating TW depths is unnecessary in some cases. They are tapered on most switches, but on stub switches they have square ends. Post Views: 81. The depth of the it under the sleepers is an important factor in the load bearing capacity and uniformity of distribution of load. Points & Crossings Section 3 Section 3: Points and Crossings This document is uncontrolled when printed. The switch consists of the pair of linked tapering rails, known as points (switch rails or point blades), lying between the diverging outer rails (the stock rails). The nominal size of ballast used for points and crossings is_____? size with short side parallel to rail. 01 of 2016) I.0 GENERAL 1.1 These specifications have been framed for a robust and sturdy machines, which shall take out the old turnouts and replace them by new assembled turnouts expeditiously and Railway Engineering Railway Engineering. Branch Circuit-1: 4 No of 1Phase, 40W, Lamp of Non… In 1877, Joseph Monier, a French gardener, suggested that concrete reinforced with steel could be used for making sleepers for railway track.Monier designed a sleeper and obtained a patent for it, but it was not successful. Start date of project: 1 October 2011 Duration: 36 months Lead beneficiary of this deliverable: COMSA Due date of deliverable: 31/05/2013 Actual submission date: 04/06/2014 Release: Final Published: 24/01/2021 3:07 AM; Author Hamad; A. • Ballast quality and ability to resist crushing forces (ballast degradation is the number 1 cause of ballast fouling) – Some railroads use different track modulus (u) values in design. … ballast. is conservative, select 54". A railroad switch (AE), turnout, or [set of] points (BE) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off.. Hard Broken Stone Ballast 40mm Size For Points And Crossings At Outside Aip Railway Track Tendersinfo provides online tenders information about all kinds of government tenders, global tenders, govt tenders and contracts. At low engine speeds, the points are closed long enough to allow the current to reach a higher current level. Points and Crossings Home » RAILWAY ENGINEERING Questions » The nominal size of ballast used for points and crossings is. Take the Quiz and improve your overall Engineering. • Example 13.1 Calculate the superelevation and the maximum permissible speed for a 2° BG transitioned curve on a high-speed route with a maximum sanctioned speed of 110 km/h. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. The nominal size of ballast used for points and crossings is a) 25 mm b) 40 mm c) 50 mm d) 10 mm Ans: a 47. Profile and plan of platform edge (off street) warning surface . Power Supply is 430V (P-P), 230 (P-N), 50Hz. Railway Engineering; The nominal size of ballast used for points and crossings is_____? The nominal size of ballast used for points and crossings is_____? Consider Demand Factor 0.6 for Non Continuous Load & 1 for Continuous Load for Each Equipment. 46. The nominal size of ballast used for points and crossings is. History. For mixing of rails suitable arrangement is done as shown in Fig.5.6. Tactile surface arrangement at controlled crossings along a . 83. SPECIFICATIONS FOR POINTS & CROSSINGS CHANGING MACHINES FOR BROAD GAUGE (1676 mm) (Specification No. Posted on by Leave a comment. (b) Full ballast profile should be provided as for track for main line Emergency crossover between double or multiple lines which are laid only in the trailing direction may be laid with 1 in 8-1/2 crossings In the case of 1 in 8-1/2 turn-outs with straight switches laid on passenger running lines, the speed shall be restricted to 10 km.p.h. 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