Question

Track modulus is defined as:

(a) Load/unit length of sleeper

(b) Load/unit length of sleeper to produce depression in rail

(c) Load/unit length of rail to produce depression in sleeper

(d) Load/unit length of rail to produce unit depression/deflection in track

This question was addressed to me in an interview for internship.

Enquiry is from Railway Engineering topic in portion Other Major Topics in Civil Engineering of Basic Civil Engineering

Answer 1

Right answer is (d) Load/unit length of rail to produce unit depression/deflection in track

For explanation I would say: The track modulus defines the stiffness of track or its load bearing capacity. It is based on the elastic theory.  When a load causes a deflection on the top of the rail, the deformation comes on the sleeper, below the rail.