76. Number of switches provided on a Gaunt-letted track is
a) 1
b) 2
c) 3
d) none of the above
Ans: d
77. 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
78. 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
79. 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
80. 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
81. 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
82. 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
83. 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
84. 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
85. 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
86. 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
87. The height of the centre 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
88. 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
89. Yellow lighthand signal indicates
a) stop
b) proceed
c) proceed cautiously
d) none of the above
Ans: c
90. 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
91. 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
92. 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
93. 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
94. 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
95. 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 andB
d) cannot be determined from the given data
Ans: b
96. For laying the railway track, materials required are
A) Rails
B) FishPlates
C) Fish Bolts
D) Bearing Plates
The quantities required for one kilometre of Broad Gauge track will be
Ans: b
97. Metal sleepers are superior to wooden sleepers with respect to
a) cost
b) life
c) track circuiting
d) fastening
Ans: b
98. 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
99. 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
100. Consider the following statements: Automatic signalling system results in
1. greater risk
2. higher efficiency
3. avoidance of block instruments
4. higher operating cost
The correct answer is
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
101. Wear of rails is maximum in weisht of
a) tangent track
b) sharp curve
c) tunnels
d) coastal area
Ans: b
102. 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
103. 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
104. 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.
The correct answer is
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
105. 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
106. 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
107. 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
108. 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
109. 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
110. 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