Which one of the following statement is correct regarding ballast used for railway tracks?

Question

Question

This question was previously asked in

ESE Civil 2020: Official Paper

The minimum depth of ballast for B.G. section is 20 cm – 25 cm
The quantity of stone ballast required for one metre length of track is 0.53 m³ for B.G. section
For M.G. section the width of ballast is 1.83 m
The minimum depth of ballast for N.G. section is 10 cm

Answer 1

Explanation:

Ballast

It is the granular material that is placed and packed below and surrounding the sleeper.

Functions:

1. It transmits the load from sleepers to subgrade

2. Provide good drainage.

The characteristics of ballast are:

1. The depth of ballast for different type tracks is:

For BG: 20-25 cm

For MG: 15-20 cm

For NG: 15 cm

2. The quantity of stone ballast required for one-meter length of track for different type of tracks is as follow:

For BG – 1.036 m³.

For MG – 0.71 m³.

For NG – 0.53 m³.

3. The size of ballast depends on the type of sleeper and location of track and its is given as:

For Wooden sleeper - 5 cm

For Metal sleeper - 4 cm

For turnouts and cross-over - 2.5 cm