315) Consider the following surveys. 1.Reconnaissance survey 2.Preliminary survey 3.Traffic survey 4.Location survey The correct sequence in which these surveys are conducted before the alignment of a track is finalised is

316) The load on each axle of a locomotive is 22 tonnes. If the coefficient of friction is 0.2, then the hauling capacity due to 3 pairs of driving wheels will be

317) In a B.G. railway track, the specified ruling gradent is 1 in 250. The horizontal curve of 3° on a gradient of 1 in 250 will have the permissible gradient of

318) For a sleeper density of (n+5), the number of sleepers required for constructing a broad gauge railway track of length 650 m is

319) If ′A′ is the angle formed by two gauge faces, the crossing number will be