Railway Engineering

31. Best ballast contains stones varying in size from

1. 1.5 cm to 3 cm
2. 2.0 cm to 4 cm
3. 2.0 cm to 5 cm
4. 2.5 cm to 6 cm

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32. Best wood for wooden sleepers is

1. Chir
2. Deodar
3. Sal
4. Teak

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33. Boxing of ballast is done

1. Under rails
2. At the rails
3. In between two rails
4. In between two sleepers

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34. Bull headed rails are generally provided on

1. Points and crossing
2. Straight tangents
3. Curved tracks
4. Metre gauge tracks

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35. Burnettising is done for the preservation of

1. Wooden sleepers
2. Rails
3. Ballast
4. None of these

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36. By interchanging gibs and cotters of a pot sleeper, gauge may be slackened by

1. 1.2 mm
2. 2.2 mm
3. 3.2 mm
4. 4.2 mm

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37. Cant deficiency occurs when a vehicle travels around a curve at

1. Equilibrium speed
2. Speeds higher than equilibrium speed
3. Speeds lower than equilibrium speed
4. Booked speed

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38. Cast iron sleeper, is

1. Pot sleeper
2. Box sleeper
3. Duplex sleeper
4. All the above

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39. Charles Blacker Vignoles invented the flat footed rails in

1. 1814
2. 1836
3. 1846
4. 1856

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40. Check rails are provided on inner side of inner rails if sharpness of a B.G. curve, is more than

1. 3°
2. 5°
3. 6°
4. 8°

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