In prestressed concrete, a prestress force is applied to a concrete member and this induces an axial compression that counteracts all, or part of, the tensile stresses set up in the member by applied loading. In the field of bridge engineering, the introduction of prestressed concrete has aided the construction of long-span concrete bridges. These … Read more
Objective type and Interview Questions on Strength of Materials – interview questions for civil engineers The impact strength of a material is an index of its Correct Answer: toughness In brittle material, normally, breaking stress is equal to ultimate stress Thermal strain of a body does not depend on Correct Answer: length Thermal change of … Read more
Formation of Soil & Types of Soil The process of soil formation is called Pedogenesis. Pedogenesis is a cyclic phenomenon called geological cycle. Geological cycle has four cyclic steps. Erosion->Transportation->Deposition->Upheaval->Erosion Soil mechanics is the branch of civil engineering which deals with the study of characteristics , classification and behavior of soil under loaded and unloaded … Read more
Sleeper Density in Railways Number of sleepers provided for one rail length of track is called sleeper density. If “N” is the length of one rail in meters, Sleeper Density = N+ X , (X –> 3 to 6) For a Broad Gauge track, total number of sleepers required for 1km length of railway track … Read more
How to calculate Minimum number of Sleepers, Breathing and Theoretical Length in Long Welded Rails Long Welded Rails is welded rail in which central part does not undergo any longitudinal movement due to temperature variation. A length of greater than 250 metre on Broad Gauge (BG) and 500 metre on Metre Gauge (MG) will normally … Read more
Coning of Wheels in Railways : Theory and Purpose Theory The Surface of wheels are made in cone shape at an inclination of 1 in 20, and the same slope is provided in the rails (see fig), this is known as coning of wheels. The diameter of wheel is different at different cross section of … Read more
Components of Railway Track Gauge – Inner to inner distance between two rails. Types of Gauges Broad Gauge (BG) – 1.676m Meter Gauge (MG) – 1m Narrow Gauge – 0.762m Feether Track Gauge – 0.61m Ballast forms the Bed upon which railway sleepers or railroad ties are laid. It is packed between and around the … Read more