This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Steel Trough Sleeper”.
1. Which of the following is not true about steel trough sleepers?
a) Long life
b) Liable to decay
c) Good lateral rigidity
d) Simple manufacturing process
Explanation: Steel trough sleepers are not liable to decay like wooden sleepers. They do not decay and aren’t attacked by vermin.
2. What type of problems are observed in case of pressed up lugs?
a) Maintenance problems
b) Cost inefficiency
c) Improper fitting
d) They are easily decayed
Explanation: Due to vibrations the pressed up lugs cause movement of keys. Thus they require frequent and efficient maintenance.
3. The steel trough sleepers are very useful in case of long welded rails.
Explanation: Steel trough sleepers provide good lateral stability and can be used easily along with fastenings. Consequently they can be used with long welded rails.
4. What is the limit for inward tilt at rail seat?
a) 1 in 15 to 1 in 25
b) 1 in 20 to 1 in 25
c) 1 in 15 to 1 in 20
d) 1 in 10 to 1 in 30
Explanation: The limit for inward tilt at rail seat is from 1 in 15 to 1 in 25. The sleepers are termed defective otherwise.
5. What mark is given to first quality sleepers?
a) A yellow cross
b) A green dot
c) A red strip
d) A green strip
Explanation: A green dot indicates that the sleepers are of first quality. A 15cm wide strip of yellow paint is used to mark all second quality steel trough sleepers. This is done to avoid mixing.
6. Which sleepers are marked with a cross in yellow paint?
a) Second quality sleepers
b) Sleepers unfit for use
c) Sleepers rejected as first quality but free from defects
d) Third quality sleepers
Explanation: There are certain sleepers which are unfit to be called as first quality sleepers, but are free from defects like twist, grooves, etc. these are marked with a cross in yellow paint.
7. The ballast is removed from the centre of the steel sleepers after packing.
Explanation: The steel trough sleepers becomes centre bound without proper care while packing. Thus ballast is removed from centre.
Sanfoundry Global Education & Learning Series – Railway Engineering.
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