SHOTS - RAILWAY ENGINEERING
💥The rail is designated by its weight per unit length.
💥Carbon and manganese are the 2 important components used in steel for rail.
💥The length of rail BG and MG is 13m and 12m.
💥Largest dimension of rail is height.
💥Largest percentage of material in the rail is in head.
💥The purpose of providing the fillet in rail section is to avoid stress concentration.
💥52kg rails are used in broad gauge.
💥60R rails used in meter gauge.
💥Ordinary rails are made of high carbon steel.
💥The main function of fish plate is to join the two rails together.
💥Number of fish bolts per fish plate is 4.
💥Gauge is the distance between the running faces of the rail.
💥Broad gauge provided in main cities.
💥Meter gauge-undeveloped areas.
💥Narrow gauge-thinly populated areas.
💥Tilting –the process of giving inward slope of 1in 20.
💥Coning – the process of giving the outward slope of 1in 20.
💥Hogging of rails-the rails are bent down due to loose packing of ballast.
💥Buckling of rail-the rails get out of their original shape due to insufficient expansion joints.
💥Creep of rail –flow of rail metal due to the longitudinal movement of rail.
💥Wear of rail- the flow of rail metal due to heavy load.
💥The height of the 52kg rail section is 156mm.
💥19mm is the gap provided between the inside edges of wheel and gauge faces.
💥Creep is the longitudinal movement of rail.
💥The maximum degree of curvature for meter gauge is 16*.
💥Staggered joints are generally provided on curves.
💥Wooden sleepers are preferred on joints.
💥Sleeper density in India varies from n+2 to n+7.
💥Composite sleeper index determines the hardness and strength.
💥Minimum composite sleeper index preferred by Indian railways is 783.
💥Dog spikes are used for fixing the rails to the wooden sleepers.
💥25mm size ballast is used under points and crossings.
💥3.35m & 2.3m is the width of the ballast section for BG and MG.
💥2 keys used in CST-9 sleeper.
💥35mm/sec is the desirable rate of change of cant deficiency of MG.
💥Normally the limiting value of cant is G/10.
💥Cant deficiency occur when a vehicle travels speeds higher then equilibrium speed.
💥The shape of the curve used by Indian railways is transition curve.
💥One degree curve=1750/R.
💥Switch angle is the angle between gauge face of the stock rail and tongue rail.
💥Yellow light signal indicates proceed cautiously.
💥Crushed head failure caused by loose fish bolts.
💥Wear of rails is maximum in sharp curves.
💥A treadle bar is used for interlocking points and signal.