Correct Answer - Option 3 : 275 × 25 × 13
Concept:
Sleepers:
- Sleepers are used to support or fix the rail.
- It safely transfers point load into the uniformly distributed load to the ballast.
Classification of sleepers:
1). Wooden sleepers:
- Sal and teak are mainly used in timber sleepers.
- It has a life of 12-15 years.
- Zncl2 solution is used for the increment of sleepers life
1). Metal sleepers:
- Cast iron sleepers are more used in compression to steel sleepers because of corrosion problems.
- Life - 35 to 40 years
1). Concrete sleepers:
Explanation:
The standard size of wooden sleeper used in Broad gauge- 275cm × 25cm × 13cm
The standard size of wooden sleeper used in Meter gauge- 183cm × 20cm × 11cm
The standard size of wooden sleeper used in Narrow gauge- 150cm × 18cm × 9cm