Railway Engineering Questions and Answers – Rack Railways

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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.
a) True
b) False
View Answer

Answer: a
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
View Answer

Answers: b
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
View Answer

Answer: a
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.
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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
View Answer

Answer: a
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.
a) True
b) False
View Answer

Answer: a
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.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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