# Civil Engineering - Railways

### Exercise :: Railways - Section 1

26.

Wooden sleepers used on the girders of bridges, are generally made of

 A. sal B. chir C. teak D. deodar.

Explanation:

No answer description available for this question. Let us discuss.

27.

If L1 and L2 are actual and theoretical lengths of a tongue rail, d is heel divergence and t is thickness of tongue rail at toe, the switch angle α is

 A. B. C. D. E.

Explanation:

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28.

If D is distance between centres of two parallel track of gauge G, then, total length of cross-over (from the point of commencement to the point of termination) with an intermediate straight portion and N crossing, is given by

 A. DN + G (N + 1 + N2) B. DN + G (2N + 1 + N2) C. DN + G (3N + 1 + N2) D. DN + G (4N + l +N2)

Explanation:

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29.

If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is

 A. 10 chains B. 12 chains C. 14 chains D. 16 chains

Explanation:

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30.

Overall depth of a dog spike, is

 A. 120.6 mm B. 155.90 mm C. 135 mm D. 150 mm E. none of these.