21. Approximately ____________ rails are mostly used in Broad gauge.

- 24.8 kg
- 52 kg
- 44.7 kg
- None of the above

22. The maximum speed on a 3° broad gauge curve according to Martin’s formula is

- 88.97 kmph
- 67.45 kmph
- 122.59 kmph
- 97.88 kmph

23. The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called

- flange way clearance
- heel divergence
- throw of the switch
- flange way of the heel

24. Staggered rail joints are generally provided

- on curves
- on tangents
- on bridges
- in tunnels

25. Two parallel railway lines are to be connected by a reverse curve, each section of the curve having the same radius. If the centre line are 8 metre apart and maximum distance between the tangent points is 32 metre, the maximum allowable radius of the curves will be

- 4 metre
- 8 metre
- 32 metre
- 48 metre

26. Marshalling yard in railway system provides facilities for

- maintenance of rolling stock
- safe movements of passengers and coaches
- receiving, breaking up, re-forming and dispatching onwards-of trains
- receiving, loading, unloading and delivery of goods and vehicles, and scheduling their further functioning

27. Two parallel railway lines are to be connected by a reverse curve, each section having the same radius. If the lines are 12 m apart and the maximum distance between tangent points measured parallel to the straights is 48m, then the maximum allowable radius will be

- 51.1 m
- 52.3 m
- 53.5 m
- 54.7 m

28. Perpendicular offset from the junction of a transition curve and circular curve to the tangent is equal to

- 0.5 × Shift
- Shift
- 4 × Shift
- 2 × Shift

29. A train is running on a wide gauge at a speed of 85 kmph and has to negotiate a curvature. If overturning is to be avoided at this speed, then the type of curvature required would be

- Compound curve
- Base curve
- Vertical curve
- Transition curve
- Lag curve

30. Overall depth of a dog spike is

- 155.9 mm
- 120.6 mm
- 150 mm
- 135 mm