1.A train is hauled by 4-8-2 locomotive. The number of driving wheels in this locomotive is

2.The object of providing a point lock is

3.Which of the following mechanical devices is used to ensure that route cannot be changed while the train is on the point even after putting back the signal ?

4.Which one of the following rail failures is caused by loose fish bolts at expansion joints?

5.Wear of rails is maximum in weisht of