Railway Bridge and Tunnel Engineering MCQ Questions and Answers in Civil Engineering

Question: Smith diamond is provided if the angle of diamond is less than
a) 2°
b) 4°
c) 6°
d) 8°

Answer: c

Question: 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

Answer: b

Question: A scissors cross-over consists of
a) Two pairs of points, four acute angle crossings and two obtuse angle crossings
b) Four pairs of points, four acute angle crossings and four obtuse angle crossings
c) Four pairs of points, six acute angle crossings and two obtuse angle crossings
d) Two pairs of points, six acute angle crossings and four obtuse angle crossings

Answer: c

Question: Minimum composite sleeper index for wooden sleepers used over bridge girders, is
a) 1455
b) 1355
c) 1255
d) 1155

Answer: a

Question: The standard width of ballast for B.G. Track in Indian Railways, is kept
a) 3.35 m
b) 3.53 m
c) 2.35 m
d) 2.53 m

Answer: a

Question: The type of bearing plate used in all joints and on curves to give better bearing area to the rails is
a) Flat mild steel bearing plate
b) Mild steel canted bearing plate
c) Cast iron anti-creep bearing plate
d) None of the above

Answer: b

Question: At points and crossings, the total number of sleepers for 1 in 12 turnouts in Broad Gauge is
a) 51
b) 62
c) 70
d) 78

Answer: c

Question: Maximum cant deficiency prescribed on Indian Board Gauge Railways, is
a) 40 mm
b) 50 mm
c) 75 mm
d) 100 mm

Answer: d

Question: If G is gauge is metres, V is speed of trains in km/hour and R is radius of a curve in metres, the equilibrium super elevation is
a) GV²/R
b) GV²/17R
c) GV²/127R
d) GV²/130R

Answer: c

Question: 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

Answer: b

Question: Creep is the
a) Longitudinal movement of rail
b) Lateral movement of rail
c) Vertical movement of rail
d) Difference in level of two rails

Answer: a

Question: Total effective bearing area of both the bowls of a pot sleeper, is
a) Slightly more than that of a wooden sleeper
b) Slightly less than that of a wooden sleeper
c) Equal to that of a wooden sleeper
d) None of these

Answer: c

Question: Type of switch rails generally adopted for modern track, is
a) Straight switch
b) Curved switch
c) Loose heel switch
d) Bent switch

Answer: b

Question: Minimum composite sleeper index for wooden sleepers used in cross-overs, is
a) 1152
b) 1252
c) 1352
d) 1452

Answer: c

Question: Degree of a railway curve is defined as number of degrees subtended at the centre of a curve by
a) 10 m
b) 15 m
c) 20 m
d) 30.5 m

Answer: d

Question: Overall depth of a dog spike, is
a) 120.6 mm
b) 155.90 mm
c) 135 mm
d) 150 mm

Answer: a

Question: The life of a wooden sleeper depends upon
a) Quality of its timber
b) Ability to resist decay
c) Resistance to weathering
d) All the above

Answer: d

Question: Loose jaws of steel trough sleepers are made of
a) Cast steel
b) Mild steel
c) Cast iron
d) Spring steel

Answer: d

Question: Charles Blacker Vignoles invented the flat footed rails in
a) 1814
b) 1836
c) 1846
d) 1856

Answer: b

Question: Head width of 52 kg rail section is
a) 61.9 mm
b) 66.7 mm
c) 67 mm
d) 72.33 mm

Answer: c

Question: The limiting value of cant excess for Broad Gauge is
a) 55 mm
b) 65 mm
c) 75 mm
d) 100 mm

Answer: c

Question: Burnettising is done for the preservation of
a) Wooden sleepers
b) Rails
c) Ballast
d) None of these

Answer: a

Question: The rail section which is not used on Indian metre gauge tracks, is
a) 25 R
b) 30 R
c) 35 R
d) 40 R

Answer: d

Question: By interchanging gibs and cotters of a pot sleeper, gauge may be slackened by
a) 1.2 mm
b) 2.2 mm
c) 3.2 mm
d) 4.2 mm

Answer: c

Question: Study the following statements regarding creep.
(i) Creep is greater on curves than on tangent railway track,
(ii) Creep in new rails is more than that in old rails,
(iii) Creep is more on steep gradients than on level track. The correct answer is
a) Only (i)
b) (i) and (ii)
c) (ii) and (iii)
d) (i), (ii) and (iii)

Answer: b

Question: Ordinary rails are made of
a) Mild steel
b) Cast iron
c) Wrought iron
d) High carbon steel

Answer: d

Question: For a Broad Gauge route with (M + 7) sleeper density, number of sleepers per rail length is
a) 18
b) 19
c) 20
d) 21

Answer: c

Question: 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

Answer: a

Question: Composite sleeper index is the index of
a) Hardness and strength
b) Strength and toughness
c) Toughness and wear resistance
d) Wear resistance and hardness

Answer: a

Question: The purpose of providing fillet in a rail section is to
a) Increase the lateral strength
b) Increase the vertical stiffness
c) Avoid the stress concentration
d) Reduce the wear

Answer: c

Question: On Indian Railways, number of a crossing is defined as
a) Sine of angle of crossing
b) Cosine of angle of crossing
c) Tangent of angle of crossing
d) Contingent of angle of crossing

Answer: d

Question: For even distribution of load through ballast, load dispersal is assumed as
a) 30° to the vertical
b) 45° to the vertical
c) 60° to the vertical
d) None of these

Answer: b

Question: A turn-in-curve is defined as
a) A curve introduced between two straights
b) A reverse curve
c) A reverse curve introduced in continuity of a turn out
d) A spiral transition curve

Answer: c

Question: If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is
a) 10 chains
b) 12 chains
c) 14 chains
d) 16 chains

Answer: c

Question: Rail tops of a track are placed
a) Horizontal
b) At an inward slope of 1 in 20
c) At an outward slope of 1 in 20
d) At an outward slope of 1 in 30

Answer: b

Question: Pick up the incorrect statement from the following:
a) Ends of adjoining rails should be in true alignment
b) Rail joints should be as strong as the rail section itself
c) Rail joints should be elastic laterally as well as vertically
d) All the above

Answer: d

Question: If the standard length of a crossing is 480 cm, the number of crossing is
a) 1 in 8½ of b)G.
b) 1 in 8½ of M.G.
c) Both (a) and (b)
d) None of these

Answer: c

Question: If D is the distance between parallel tracks G between theoretical noses of two crossings measured parallel to tracks, is
a) (D - G - G )
b) (D - G + G )
c) (D - G - G )
d) (D + G + G )

Answer: a

Question: Rail section first designed on Indian railways, was
a) Double headed
b) Bull headed
c) Flat footed
d) (a) and (b) simultaneously

Answer: a

Question: Check rails are provided on inner side of inner rails if sharpness of a .BG. curve, is more than
a) 3°
b) 5°
c) 6°
d) 8°

Answer: d

Question: In a diamond crossing, numbers of noses are
a) 2
b) 3
c) 4
d) 6

Answer: d

Question: In permanent way, ballast
a) Transfers load from sleepers to the formation
b) Provides an elastic bed to the track
c) Provides a drainage of track
d) All the above

Answer: d

Question: 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

Answer: c

Question: 60 R rails are mostly used in
a) Broad Gauge
b) Metre Gauge
c) Narrow Gauge
d) None of the above

Answer: b

Question: Yellow light-hand signal indicates
a) Stop
b) Proceed
c) Proceed cautiously
d) None of the above

Answer: c

Question: angle and R is radius of the turnout, the length of the tongue rail, is
a) R
b) R
c) /2
d) /2

Answer: d

Question: In India, metre gauge permanent way was adopted in
a) 1855
b) 1860
c) 1866
d) 1871

Answer: d

Question: Pick up the correct statement from the following:
a) Rails are directly laid over hard wooden sleepers and fixed with spikes
b) Adzing is done on hard wooden sleepers
c) Bearing plates are used on soft wooden sleepers
d) All the above

Answer: d

Question: 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

Answer: b

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

Answer: c

Question: Heel divergence is
a) Always less than flange-way clearance
b) Equal to flange-way clearance
c) Always greater than flange-way clearance
d) Sometimes greater than flange-way clearance

Answer: c

Question: 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
a) Roaring rails
b) Hogged rails
c) Corrugated rails
d) Buckled rails

Answer: b

Question: Pick up the incorrect statement from the following:
a) Sleepers hold the rails at proper gauge on straights
b) Sleepers provide stability to the permanent way
c) Sleepers act as an elastic cushion between rails and ballast
d) None of these

Answer: d

Question: 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

Answer: b

Question: The standard dimensions of a wooden sleeper for M.G. railway track are
a) 2.74 m × 25 cm × 13 cm
b) 1.83 m × 20 cm × 11 cm
c) 1.52 m × 15 cm × 10 cm
d) 1.75 m × 20 cm × 12 cm

Answer: b

Question: Widening of gauge is provided if degree of the curve, is
a) 3° or less
b) 3° to 4½°
c) More than 4½°
d) None of these

Answer: c

Question: In Indian railways, the ratio of axle load and weight of rail, is
a) 312
b) 412
c) 512
d) 600

Answer: c

Question: If L is length of a rail and R is the radius of a curve, the versine h for the curve, is
a) a = L/4R
b) a = L²/4R
c) h = L²/8R
d) h = L²/16R

Answer: c

Question: Indian Railways detects the rail flow by
a) Mitsubishi Rail flow dector
b) Soni Rail flow dector
c) Audi-gauge Rail flow detector
d) Kraut Kramer Rail flow detector

Answer: d

Question: A kink is made in stock rails, ahead of the toe of switch at a distance of
a) 10 cm
b) 15 cm
c) 20 cm
d) 30 cm

Answer: b

Question: An extra 7.5 cm ballast width is not provided on outer side on a curve, if its degree is
a) 6°
b) 5°
c) 4°
d) 3°

Answer: d

Question: The distance between theoretical nose of crossing and actual nose of crossing for practical purposes, is
a) Nose thickness ×
b) Nose thickness ×
c) Nose thickness ×
d) Nose thickness ×

Answer: b

Question: If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is
a) 10 chains
b) 12 chains
c) 14 chains
d) 16 chains

Answer: c

Question: Staggered joints are generally provided
a) On curves
b) On straight track
c) When two different rail sections are required to be joined
d) None of the above

Answer: a

Question: The rail is designated by its
a) Length
b) Weight
c) Cross-section
d) Weight per unit length

Answer: d

Question: 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

Answer: b

Question: Tensile strength of steel used in rails should not be less than
a) 450 MPa
b) 500 MPa
c) 700 MPa
d) 850 MPa

Answer: c

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

Answer: b

Question: The check rails are placed opposite the crossing so that
a) It is symmetrically placed opposite nose of crossing
b) Its one-third length is ahead of the nose of crossing
c) Its two-third length is ahead of the nose of crossing
d) Its three fourth length is ahead of the nose of crossing

Answer: c

Question: 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 super-elevation to be actually provided on the branch line will be
a) 10 mm
b) 64 mm
c) 85 mm
d) 65 mm

Answer: d