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491. On curves, to counteract the effect of centrifugal force, the level of outer rail is raised above the inner rail by a certain amount. This is called:
(a) Track gradient
(b) Track slope
(c) Super elevation
(d) Horizontal gradient

492. The measure of stiffness of track required to produce a unit depression in the track is known as:
(a) Tractive force
(b) Load capacity
(c) Gauge
(d) Track modulus

493. The head of a gang in maintenance organisation of railway is called:
(a) P.W.I
(b) Keyman
(c) Ganger
(d) A.P.W.I

494. The fixed rail in a railway track against which the tongue rail fits s known as:
(a) wing rail
(b) stock rail
(c) lead rail
(d) point rail

495. The standard length of rail for Broad Gauge track in India is:
(a) 19.2 m
(b) 25.6 m
(c) 11.8 m
(d) 12.8 m