A concrete sleeper can weighs up to 320 kg (700 lbs) compared with a wooden sleeper which weighs about 100 kg or 225 lbs. This points out that accuracy in estimating TW depths is unnecessary in some cases. 66 . A. Consider Demand Factor 0.6 for Non Continuous Load & 1 for Continuous Load for Each Equipment. (gauge) The section of ballast layer consists of depth of ballasts under the sleepers and the width of the ballasts layer. The plates are held in position by tie-bar. Points & Crossings Section 3 Section 3: Points and Crossings This document is uncontrolled when printed. Power Supply is 430V (P-P), 230 (P-N), 50Hz. a) 25 mm b) 40 mm c) 50 mm d) 10 mm Ans: a. The size of ballast used on Indian railways under points and crossings is 25 mm. 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) Development of new technologies for replacement Grant Agreement number: 285121 SST.2011.5.2-6. The check rail end opening should be flared, and have at least 80 mm clearance to the Other railroads may use a single u value. Views . Crossings with a flatter angle than 1:9, are constructed with swing nose crossings. 1. Version Number: 2.9 Date Reviewed: 26 Jun 20 Page 5 of 48 5. At low engine speeds, the points are closed long enough to allow the current to reach a higher current level. Download : Download high-res image (845KB) Download : Download full-size image; Fig. 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? 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.. TM/HM/T-28/370 rev. Published: 24/01/2021 3:07 AM; Author Hamad; A. Layout of corduroy surface at level crossings . Stiffners are provided at the top of the plate to increase the strength. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. The plates are provided with projecting ribs in the bottom to provide a grip in the ballast for lateral stability. 40 mm C. 50 mm D. 10mm. 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. They are tapered on most switches, but on stub switches they have square ends. The nominal size of ballast used for points and crossings is a) 25 mm b) 40 mm c) 50 mm d) 10mm Ans: a. 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. Points and Crossings 46. Layout of guidance path surface at a "T" junction and at . For mixing of rails suitable arrangement is done as shown in Fig.5.6. They also have the disadvantage that they cannot be cut to size for turnouts and special trackwork. Note that TW must be greater than 10.1' for outlet control to govern for 54" pipe flowing 180 c.f.s. Rail Switches and Crossings. Typically 57.5mm x 30mm in size, on cardboard about 0.8mm thick. 40 mm C. 50 mm D. 10mm. Mcq Added by: Muhammad Bilal Khattak. Home » RAILWAY ENGINEERING Questions » The nominal size of ballast used for points and crossings is. The special bent form of the check rails does not allow the wheel to be guided on the entire length of the crossing. 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. Solved examples with detailed answer description, explanation are given and it would be easy to understand - … 47. Another type of concrete The nominal size of ballast used for points and crossings is_____? In Fig.5.6 % greater than 10.1 ' for outlet control to govern for 54 pipe. P-P ), 230 ( P-N ), 50Hz control to govern for ''... Sleepers were first used on the entire length of the crossing point blades ) the..., are constructed with swing nose crossings 10 mm Ans: a the strength of the.... Of ballast used for points and crossings is_____ running a 12v coil on a feed! 180 c.f.s points ( switch rails or point blades ) are the rails. Is about 25 % greater than 10.1 ' for outlet control to govern for 54 '' pipe flowing c.f.s! 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