57.  The standard dimensions of a wooden sleeper for a B.G. railway track are
A. 2.74 m x 25 cm x 13 cm
B. 1.83 m x 20 cm x 11 cm
C. 1.52 m x 15 cm x 10 cm
D. 1.75 cm x 20 cm x 12 cm

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58.  The standard dimensions of a wooden sleeper for M.G. railway track are
A. 2.74 m x 25 cm x 13 cm
B. 1.83 m x 20 cm x 11 cm
C. 1.52 m x 15 cm x 10 cm
D. 1.75 m x 20 cm x 12 cm

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59.  Pick up the correct statement from the following :
A. Rails are directly laid over hard wooden sleepers and fixed with spikes
B. Adzing is done on hard wooden sleepers
C. Bearing plates are used on soft wooden sleepers
D. All the above.

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60.  Spacing of sleepers
A. throughout the length of a rail is kept uniform
B. near rail joints, is kept closer
C. at the middle of rails, is kept closer
D. none of these.

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61.  If S and H are strength and hardness index of a timber at 12% moisture content, the composite sleeper index, is
A.H+ 10S
B. S + 10H
C. 20S + H10
D. S + 20H

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62.  Composite sleeper index determines
A. number of sleepers per rail length
B. suitability of wooden sleepers
C. permissible stresses in steel sleepers
D. none of these.

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63.  Minimum composite sleeper index for wooden sleepers used over bridge girders, is
A.1455
B.1355
C.1255
D.1155

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