Railway Engineering
When semaphore and warner are installed on the same post, then the stop indication is given when

None of these
both arms are horizontal
both semaphore and warner arms lowered
semaphore arm lowered but warner arm horizontal

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Railway Engineering
On a single rail track, goods trains loaded with heavy iron material run starting from ‘A’ to ‘B’ and then empty wagons run from ‘B’ to ‘A’. The amount of creep in the rails:

Will be maximum at the middle of A and B
Will be more in the direction of A to B
Will be more in the direction of B to A
Cannot be determined from the given data

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