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 Meter 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) 50mm
c) 75mm
d) 100mm
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
66. 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
67. 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 metres.
Ans: c
68. 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
69. 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
70. Maximum value of ‘throw of switch’ for Broad Gauge track is
a) 89 mm
b) 95 mm
c) 100 mm
d) 115mm
Ans: d
71. 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
72. Which of the following methods of designation of crossing is mostly used in India ?
a) centre line method
b) right angle method
c) isosceles angle method
d) none of the above
Ans: b
73. 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
74. 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
75. 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