155. If the standard length of a B.G. crossing is 597 cm, the number of crossing, is
A. 1 in 8 1/2
B. 1 in 12
C. 1 in 16
D. none of these.
156. To avoid the damage of nose of crossing, the wing rails are ramped so that nose of crossing remains at a lower level by
A. 3 mm
B. 4 mm
C. 5 mm
D. 6 mm.
157. The check rails are placed opposite the crossing so that
A. it is symmetrically placed opposite nose of crossing
B. its one-third length is ahead of the nose of crossing
C. its two-third length is ahead of the nose of crossing
D. its three fourth length is ahead of the nose of crossing.
158. A wing rail is renewed or reconditioned if its maximum vertical wear is
A. 9.5 m
B. 7.5 m
C. 5.5 m
D. 5.0 m.
159. A kink is made in stock rails, ahead of the toe of switch at a distance of
A. 10 cm
B. 15 cm
C. 20 cm
D. 30 cm.
160. If the stock rails are B.H. rails, the type of switch generally provided, is
A. articulated
B. undercut
C. over riding
D. straight cut.
161. The type of switch generally used for B.G. and M.G. tracks, is
A. articulated
B. undercut
C. over riding
D. straight cut.
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