130 TOP MOST RAILWAY ENGINEERING Interview Questions – Civil Engineering Objective Type Questions and Answers

Railway Engineering Interview Questions and Answers :-

1. The rail is designated by its

2. Two important constituents in the com-position of steel used for rail are

3. The standard length of rail for Broad Gauge and Meter Gauge are respectively

4. The following tests are conducted for rails:

5. Largest dimension of a rail is its

6. Largest percentage of material in the rail is in its

7. The purpose of providing fillet in a rail section is to

8. The cross-sectional area of 52 kg flat footed rail is

9. 52 kg rails are mostly used in

10. Tensile strength of steel used in rails should not be less than

11. Head width of 52 kg rail section is

12. 60 R rails are mostly used in

13. Ordinary rails are made of

14. The main function of a fish plate is

15. Number offish bolts per fish plate is

16. Fish plate is in contact with rail at

17. Gauge is the distance between

18. Which of the following factors govern the choice of the gauge ?

19. For developing thinly populated areas, the correct choice of gauge is

20. Due to battering action of wheels over the end of the rails, the rails get bent down and are deflected at ends. These rails are called

21. The slipping of driving wheels of locomotives on the rail surface causes

22. The width of foot for 90 R rail section is

23. The height of the rail for 52 kg rail section is

24. The formation width for a railway track depends on the

25. The formation width for a single line meter gauge track in embankment as adopted on Indian Railways is

26. The side slope of embankments for a railway track is generally taken as

27. The formation width for a double line Broad Gauge track in cutting (excluding drains) as adopted on Indian Railways is

28. The total gap on both sides between the inside edges of wheel flanges and gauge faces of the rail is kept as

29. Creep is the

30. Anticreep bearing plates are provided on

31. Study the following statements regarding creep.

32. The maximum degree of curvature for Meter Gauge is limited to

33. Staggered joints are generally provided

34. When the rail ends rest on a joint sleeper, the joint is termed as

35. Which of the following types of sleepers is preferred on joints ?

36. Minimum depth of ballast cushion for a Broad Gauge wooden sleeper of size 275x25x13 cm with 75 cm sleeper spacing is

37. Sleeper density in India is normally kept as

38. For a Broad Gauge route with M+7 sleeper density, number of sleepers per rail length is

39. Standard size of wooden sleeper for Broad Gauge track is

40. Composite sleeper index is the index of

41. Minimum composite sleeper index prescribed on Indian Railways for a track sleeper is

42. Dog spikes are used for fixing rail to the

43. Number of dog spikes normally used per rail seat on curved track is

44. The type of bearing plate used in all joints and on curves to give better bearing area to the rails is

45. Flat mild steel bearing plates are used

46. The nominal size of ballast used for points and crossings is

47. At points and crossings, the total number of sleepers for 1 in 12 turnouts in Broad Gauge is

48. Width of ballast section for Broad Gauge is

49. The type of spike used for fixing chairs of bull headed rails to wooden sleepers is

50. The sleepers resting directly on girder are fastened to the top fiange of girder by

51. Number of keys used in CST-9 sleeper is
a) 2
b) 3
c) 4
d) none of the above
Ans: a

52. Loose jaws of steel trough sleepers are made of
a) cast steel
b) mild steel
c) cast iron
d) spring steel
Ans: d

53. Number of cotters used in CST-9 sleepers is
a) 2
b) 3
c) 4
d) 5
Ans: c

54. Pandrol clips cannot be used with
a) wooden sleepers
b) concrete sleepers
c) CST-9 sleepers
d) steel trough sleepers
Ans: c

55. The desirable rate of change of cant deficiency in case of Metre Gauge is
a) 20 mm/sec
b) 35 mm/sec
c) 55 mm/sec
d) 65 mm/sec
Ans: b

56. The limiting value of cant excess for Broad Gauge is
a) 55 mm
b) 65 mm
c) 75 mm
d) l00 mm
Ans: c

57. The limiting value of cant gradient for all gauges is
a) 1 in 360
b) 1 in 720
c) 1 in 1000
d) 1 in 1200
Ans: b

58. Normally the limiting value of cant is
a) G/8
b) G/10
c) G/12
d) G/15
where G is the gauge.
Ans: b

59. Vertical curves are provided where algebraic difference between grades is equal to or
a) less than 2 mm/m
b) more than 2 mm/m
c) less than 4 mm/m
d) more than 4mm/m
Ans: d

60. The limiting value of cant deficiency for Meter Gauge routes is
a) 40 mm
b) 50 mm
c) 75 mm
d) 100 mm
Ans: b

61. The steepest gradient permissible on a 2.5° curve for Broad Gauge line having ruling gradient of 1 in 200 is
a) 1 in 250
b) 1 in 222
c) 1 in 235
d) 1 in 275
Ans: a

62. Normally maximum cant permissible in Meter Gauge is
a) 75 mm
b) 90 mm
c) 140 mm
d) 165 mm
Ans: b

63. Cant deficiency occurs when a vehicle travels around a curve at
a) equilibrium speed
b) speeds higher than equilibrium speed
c) speeds lower than equilibrium speed
d) booked speed
Ans: b

64. The compensation for curvature on gradient for Meter Gauge is given by
a) 70/R
b) 52.5/R
c) 35/R
d) 105/R
where R is radius of curve.
Ans: b

65. The shape of transition curve used by Indian Railways is
a) cubic parabola
b) spiral
c) sine curve
d) lemniscate of Bernoulli
Ans: a

Railway Engineering Interview Questions :-

67. A Broad Gauge branch line takes off as a contrary flexure from a main line If the superelevation required for branch line is 10 mm and cant deficiency is 75 mm, the superelevation to be actually provided on the branch line will be
a) 10 mm
b) 64 mm
c) 85 mm
d) 65 mm
Ans: d

68. One degree of curve is equivalent to
a) 1600/R
b) 1700/R
c) 1750/R
d) 1850/R
where R is the radius of curve in meters.
Ans: c

70. Switch angle is the angle between
a) the gauge face of the stock rail and tongue rail
b) the outer face of the stock rail and tongue rail
c) the gauge face of the stock rail and outer face of the tongue rail
d) the outer face of the stock rail and the gauge face of the tongue rail
Ans: a

71. Switch angle depends on
i) heel divergence
ii) length of tongue rail
iii) flangeway clearance
iv) throw of switch
The correct answer is
a) (i) and (ii)
b) (ii) and (iii)
c) (iii) and (iv)
d) (i)and(iv)
Ans: a

72. Maximum value of ‘throw of switch’ for Broad Gauge track is
a) 89 mm
b) 95 mm
c) 100 mm
d) 115 mm
Ans: d

73. Stretcher bar is provided
a) to permit lateral movement of the tongue rail
b) to maintain the two tongue rails at the exact distance
c) to ensure exact gauge at the toe of the switch as well as the nose of crossing
d) to prevent any vertical movement between the wing rail and nose of crossing
Ans: b

74. Which of the following methods of designation of crossing is mostly used in India ?
a) center line method
b) right angle method
c) isosceles angle method
d) none of the above
Ans: b

75. If a is the angle of crossing, then the number of crossings ‘N’ according to right angle method is given by
a) Vi cot(cc/2)
b) cot(oc/2)
c) cot(a)
d) Vi cosec(a/2)
Ans: c

76. Which of the following turnouts is most commonly used for goods train on Indian Railways ?
a) 1 in 8’/2
b) 1 in 12
c) 1 in 16
d) 1 in 20
Ans: a

77. Lead of crossing is the distance from the
a) heel of the switch to the toe of the switch
b) heel of the switch to the theoretical nose of the crossing
c) toe of the switch to the theoretical nose of crossing
d) toe of the switch to the actual nose of crossing
Ans: b

78. Number of switches provided on a Gaunt-letted track is
a) 1
b) 2
c) 3
d) none of the above
Ans: d

79. The correct relation between curve lead (CL), switch lead (SL) and lead of cros¬sing (L) is given by
a) CL = L – SL
b) L =CL-SL
c) SL = L + CL
d) L = (CL+SL)/2
Ans: b

80. In a scissors cross-over, the crossings provided are
i) 2 obtuse angle crossings
ii) 4 obtuse angle crossings
iii) 4 acute angle crossings
iv) 6 acute angle crossings The correct answer is
a) (i) and (iii)
b) (i)and(iv)
c) (ii) and (iii)
d) (ii) and (iv)
Ans: b

81. The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called
a) flangeway clearance
b) heel divergence
c) throw of the switch
d) none of the above
Ans: c

82. Flangeway clearance is the distance
a) between the adjoining faces of the running rail and the check rail near the crossing
b) between the gauge faces of the stock rail and the tongue rail
c) through which the tongue rail moves laterally at the toe of the switch
d) none of the above
Ans: a

83. Heel divergence is
a) always less than flangeway clearance
b) equal to flangeway clearance
c) always greater than flangeway clearance
d) sometimes greater than flangeway clearance
Ans: c

84. Which of the following mechanical devices is used to ensure that route cannot be changed while the train is on the point even after putting back the signal ?
a) detectors
b) point lock
c) iock bar
d) stretcher bar
Ans: c

85. The treadle bar is provided
a) in the middle of the track a little in front of the toes of the tongue rail
b) near and parallel to inner side of one of the rails
c) at right angle to the rail
d) near and parallel to inner side of both the rails
Ans: b

86. The object of providing a point lock is
a) to ensure that each switch is correctly set
b) to ensure that the point may not be operated while the train is on it
c) to detect any obstruction between and tongue rail
d) none of the above
Ans: a

87. Which of the following devices is used to transfer the wagons or locomotives to and from parallel tracks without any necessity of shunting ?
a) triangle
b) turntable
c) traverser
d) scotch block
Ans: c

88. A triangle is used for
a) changing the direction of engine
b) transferring wagons to and from parallel tracks without shunting
c) separating all the sidings and shunting lines from main lines
d) preventing the vehicles from running off the track
Ans: a

89. The height of the center of arm of a semaphore signal above the ground is
a) 5.5m
b) 6.5 m
c) 7.5 m
d) 8.5m
Ans: c

90. The reception signal is
i) outer signal
ii) home signal
iii) starter
iv) advanced starter The correct answer is
a) (i) and (ii)
b) (ii) and (iii)
c) (iii) and (iv)
d) (i)and(iv)
Ans: a

91. Yellow lighthand signal indicates
a) stop
b) proceed
c) proceed cautiously
d) none of the above
Ans: c

92. When semaphore and warner are installed on the same post, then the stop indication is given when
a) both arms are horizontal
b) semaphore arm lowered but warner arm horizontal
c) both semaphore and warner arms lowered
d) none of the above
Ans: a

93. In a shunting signal if the red band is inclined at 45° it indicates
a) stop
b) proceed
c) proceed cautiously
d) none of the above
Ans: b

95. For the purpose of track maintenance, the number of turn out equivalent to one track km are
a) 1
b) 2
c) 5
d) 10
Ans: d

96. A train is hauled by 4-8-2 locomotive.
The number of driving wheels in this locomotive is
a) 4
b) 8
c) 12
d) 14
Ans: b

97. To ensure exact gauge, the gauge tie plates are provided at
a) toe of the switch
b) nose of crossing
c) both (a) and (b)
d) none of the above
Ans: c

99. On a single rail track, goods trains loaded with heavy iron material run starting from
A to B and then empty wagons run from B to A. The amount of creep in the rails.
a) will be more in the direction of B to A
b) will be more in the direction of A to B
c) will be maximum at the middle of A and B
d) cannot be determined from the given data.
Ans: b

100. For laying the railway track, materials required are
A) Rails
B) FishPlates
C) Fish Bolts
D) Bearing Plates
The quantities required for one kilometer of Broad Gauge track will be
Ans: b
102. Which of the following statements regarding ballast materials are correct?
1. Brick ballast has poor drainage characteristics.
2. Coal ash is not used as ballast with steel or cast iron sleepers.
3. Gravel ballast gives better performance on soft formation.
4. Sand ballast causes excessive wear on top of rail.
Select the correct answer using the codes given below. Codes :
Ans: d

104. Metal sleepers are superior to wooden sleepers with respect to
a) cost
b) life
c) track circuiting
d) fastening
Ans: b

105. Which one of the following rail failures is caused by loose fish bolts at expansion joints?
a) crushed head
b) angular break
c) split head
d) transverse fissures
Ans: a

106. For a 8° curve track diverging from a main curve of 5° in an opposite direction in the layout of a broad gauge yard, the cant to be provided for the branch track for maximum speed of 45 km/h on the main line and ‘G’ = 1.676 m is (Permitted cant deficiency for the main line = 7.6 cm)
a) 0.168 cm
b) -0.168 cm
c) 7.432 cm
d) 7.768 cm
Ans: b

107. Consider the following statements:
Automatic signalling system results in
1. greater risk
2. higher efficiency
3. avoidance of block instruments
4. higher operating cost Of these statements
a) I and 2 are correct
b) 3 and 4 are correct
c) 1 and 4 are correct
d) 2 and 3 are correct
Ans: d

108. Wear of rails is maximum in weight of
a) tangent track
b) sharp curve
c) tunnels
d) coastal area
Ans: b

114. A train is hauled by 2-8-2 locomotive with 22.5 tonnes and on each driving axle. Assuming the coefficient of rail-wheel friction to be 0.25, what would be the hauling capacity of the locomotive?
a) 15.0 tonnes
b) 22.5 tonnes
c) 45.0 tonnes
d) 90.0 tonnes
Ans: b

115. A treadle bar is used for
a) interlocking points and signal
b) setting points and crossings
c) setting marshalling yard signals
d) track maintenance
Ans: a

116. Consider the following statements about concrete sleepers.
1. They improve the track modulus.
2. They have good scrap value.
3. They render transportation easy.
4. They maintain the gauge quite satisfactorily. Of these statements
a) 1 and 2 are correct
b) 2 and 3 are correct
c) 3 and 4 are correct
d) 1 and 4 are correct
Ans: d

117. What will be the curve lead for a 1 in 8.5 turnout taking off from a straight broad gauge track?
a) 28.49 m
b) 21.04 m
c) 14.24 m
d) 7.45 m
Ans: a

118. 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
a) 1,3,2,4
b) 1,3,4,2
c) 3,1,4,2
d) 3,1,2,4
Ans: d

119. 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
a) 26.41
b) 19.81
c) 13.21
d) 6.61
Ans: c

120. 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
a) 1 in 257
b) 1 in 357
c) 1 in 457
d) 1 in 512
Ans: b

121. For a sleeper density of (n+5), the number of sleepers required for constructing a broad gauge railway track of length 650 m is
a) 975
b) 918
c) 900
d) 880
Ans: c

122. If ‘A’ is the angle formed by two gauge faces, the crossing number will be
a) tan A
b) cot A
c) sec A
d) Arad
Ans: b

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