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.

Answer: Option C

Explanation:

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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.

Answer: Option A

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)

Answer: Option C

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

Answer: Option C

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.

Answer: Option A

Explanation:

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