Your Answer : (Not Answered)

Correct Answer : C

The sleeper density is M + 7 per rail length, where M is the length of the rail in metres, so for a 13 m rail the density is 13 + 7 = 20 sleepers per rail. The number of rail lengths in a kilometre is 1000/13 = 76.92, so

The values 1510, 1520 and 1525 would result from rounding the number of rails down before multiplying or from a slightly different density.

Your Answer : (Not Answered)

Correct Answer : B

The broad gauge of the Indian railways has a distance of 1676 mm (5 ft 6 in) between the running faces of the rails. The meter gauge is 1000 mm and the narrow gauges are 762 mm and 610 mm. The Cape gauge is the 1067 mm (3 ft 6 in) gauge named after the Cape in South Africa and is not used on the Indian main lines.

Your Answer : (Not Answered)

Correct Answer : B

Railway wheels are coned at a slope of 1 in 20. The tyres of the wheels are made conical, and the rails are tilted inwards at the same slope, so that on a curve the outer wheel runs on a larger diameter and the inner on a smaller one. This lets the wheels cover different distances without slipping and keeps the train centred on the track. Flatter or steeper slopes such as 1 in 10, 1 in 30 or 1 in 40 are not the standard coning.