This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Rack Railways”.
1. Because of a very steep gradient train can slide down the track.
Explanation: Huge amount of energy is required to pull the wagons in case of a slope steeper than 3%. If the hauling capacity of the train is not enough, the train may slide down the track.
2. How is Rack railway system different from normal railway system?
a) It is wider
b) It has an extra toothed rail
c) Extra friction is provided in the two rails
d) They are made of different materials
Explanation: The rack railway system has a toothed rail in addition with the two usual rails. This creates an interlocking system between toothed rail and wheel of the locomotive.
3. What is the position of the toothed rail in Rack rail system?
a) In the middle of the two rails
b) Connected with one of the rails
c) At a distance of 500mm from one rail
d) Can be placed anywhere
Explanation: The toothed rail is provided centrally in between the two regular rails. Placing of rail anywhere else can reduce precision. This will also lead to difficulty in manufacturing of toothed pinion wheels in locomotive.
4. What type of additional wheels are used for locomotives in Rack railway system?
a) Toothed pinion wheels
b) Coned wheels
c) High density wheels
d) No change in wheels
Explanation: A toothed pinion wheel is provided in the middle which fits in the toothed rail. This helps in easy movement through steep gradients. Thus chances of slipping or sliding of locomotive downward reduces.
5. In rack pinion railway system the movement of train can be possible on very steep gradients like 1 in 5.
Explanation: The tooth of the rack rails are fixed in the grooves of the pinion wheels. This enhances the capacity of the train to travel very steep gradients without any possibility of sliding back.
Sanfoundry Global Education & Learning Series – Railway Engineering.
To practice all areas of Railway Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.