270+ Railway Bridge and Tunnel Engineering Solved MCQs

201.

Smith diamond is provided if the angle of diamond is less than

A.
B.
C.
D.
Answer» C. 6°
202.

60 R rails are mostly used in

A. Broad Gauge
B. Metre Gauge
C. Narrow Gauge
D. None of the above
Answer» B. Metre Gauge
203.

A welded rail joint is generally

A. Supported on a sleeper
B. Supported on a metal plate
C. Suspended
D. None of these
Answer» C. Suspended
204.

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. Both (a) and (b)
205.

Width of ballast section for Broad Gauge is

A. 1.83 m
B. 2.25 m
C. 3.35 m
D. 4.30 m
Answer» C. 3.35 m
206.

Minimum length of a transition curve required for

A. 2° curves for a maximum permissible speed of 135 km/hr, is 220 metres
B. 4° curves for a maximum permissible speed of 95 km/hr, is 220 metres
C. 6° curves for a maximum permissible speed of 80 km/hr, is 220 metres
D. All the above
Answer» D. All the above
207.

For points and crossings, maximum size of ballast, is

A. 50 mm
B. 40 mm
C. 30 mm
D. 25 mm
Answer» D. 25 mm
208.

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. Right angle method
209.

For calculating the length of curve lead (C.L.), the correct formula is

A. C.L. = G. /2
B. C.L. = IG)
C. C.L. = 2 GN
D. All the above
Answer» D. All the above
210.

In a railway track, permissible gauge with tolerance under loaded condition, is

A. G + 0.1 mm
B. G + 1.5 mm
C. G - 1.0 mm
D. G - 1.5 mm
Answer» B. G + 1.5 mm
211.

Yellow light-hand signal indicates

A. Stop
B. Proceed
C. Proceed cautiously
D. None of the above
Answer» C. Proceed cautiously
212.

The first Indian railway was laid in

A. 1775
B. 1804
C. 1825
D. 1853
Answer» D. 1853
213.

Sand may be used as ballast for

A. Wooden sleepers
B. Steel sleepers
C. Cast iron sleepers
D. All the above
Answer» C. Cast iron sleepers
214.

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
Answer» A. 28.49 m
215.

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. Four pairs of points, six acute angle crossings and two obtuse angle crossings
216.

The effective bearing area of all types of sleepers, is

A. 0.40 m2
B. 0.42 m2
C. 0.44 m2
D. 0.46 m2
Answer» D. 0.46 m2
217.

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

A. 6155 mm²
B. 6615 mm²
C. 7235 mm²
D. 7825 mm²
Answer» B. 6615 mm²
218.

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. /2
219.

Steel sleepers are

A. Rectangular is cross section throughout
B. Hollow circular pipes
C. 6 mm thick steel sheets with ends bent down
D. 6 mm thick steel sheets with ends bent up
Answer» C. 6 mm thick steel sheets with ends bent down
220.

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

A. One on either side
B. Two outside and one inside
C. One outside and two inside
D. Two outside and two inside
Answer» B. Two outside and one inside
221.

Minimum composite sleeper index for wooden sleepers used over bridge girders, is

A. 1455
B. 1355
C. 1255
D. 1155
Answer» A. 1455
222.

The shape of transition curve used by Indian Railways is

A. Cubic parabola
B. Spiral
C. Sine curve
D. Lemniscates of Bernoulli
Answer» A. Cubic parabola
223.

Gauge of a permanent way, is

A. Minimum distance between running faces of rails
B. Minimum distance between outer faces of rails
C. Distance between centres of rails
D. Width of formation
Answer» A. Minimum distance between running faces of rails
224.

If w is width of sleepers, s is sleeper spacing and d is depth of ballast then

A. d = (s - w)/2
B. d = (s - w)/3
C. d = (s - w)/4
D. d = (s - w)/5
Answer» A. d = (s - w)/2
225.

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)
Answer» A. (i) and (ii)
226.

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. 3.35 m
227.

In India, metre gauge permanent way was adopted in

A. 1855
B. 1860
C. 1866
D. 1871
Answer» D. 1871
228.

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
Answer» A. Crushed head
229.

Best wood for wooden sleepers is

A. Chir
B. Deodar
C. Sal
D. Teak
Answer» D. Teak
230.

Bull headed rails are generally provided on

A. Points and crossing
B. Straight tangents
C. Curved tracks
D. Metre gauge tracks
Answer» A. Points and crossing
231.

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. Mild steel canted bearing plate
232.

For holding a rail in position, no chairs are used for

A. Flat footed rails
B. Bull headed rails
C. Double headed rails
D. Both (a) and (b)
Answer» A. Flat footed rails
233.

Cast iron sleeper, is

A. Pot sleeper
B. Box sleeper
C. Duplex sleeper
D. All the above
Answer» D. All the above
234.

Gauge is the distance between

A. Center to center of rails
B. Running faces of rails
C. Outer faces of rails
D. None of the above
Answer» B. Running faces of rails
235.

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. All the above
236.

Rail section is generally designated by its

A. Total weight
B. Total length
C. Weight per metre length
D. Area of its cross-section
Answer» C. Weight per metre length
237.

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. 70
238.

The quantity of stone ballast required per metre tangent length, is

A. 1.15 m3
B. 1.14 m3
C. 1.13 m3
D. 1.11 m3
Answer» D. 1.11 m3
239.

Weight and cross section of the rails are decided on

A. Gauge of tracks
B. Speed of trains
C. Spacing of sleepers
D. All the above
Answer» D. All the above
240.

Number of switches provided on a Gaunt-letted track is

A. 1
B. 2
C. 3
D. None of the above
Answer» D. None of the above
241.

If S is cant deficiency in centimetres and V is maximum permissible speed in kmph, the maximum length of transition curves, is

A. SV/13.6
B. SV/19.8
C. SV/127
D. SV/16.8
Answer» A. SV/13.6
242.

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. 8
243.

Maximum cant deficiency prescribed on Indian Board Gauge Railways, is

A. 40 mm
B. 50 mm
C. 75 mm
D. 100 mm
Answer» D. 100 mm
244.

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
Answer» D. More than 4mm/m
245.

A scissors cross over consists of one diamond and

A. one turn out
B. Two turn outs
C. Three turn outs
D. Four turn outs
Answer» D. Four turn outs
246.

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

A. Wheel burns
B. Hogging of rails
C. Scabbing of rails
D. Corrugation of rails
Answer» A. Wheel burns
247.

Wooden sleepers used on the girders of bridges, are generally made of

A. Sal
B. Chir
C. Teak
D. Deodar
Answer» C. Teak
248.

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
Answer» C. Both (A) and (B)
249.

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. GV²/127R
250.

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. 7.5 m
251.

A wing rail is renewed or reconditioned if its maximum vertical wear is

A. 9.5 m
B. 7.5 m
C. 5.5 m
D. 5.0 m
Answer» A. 9.5 m
252.

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
Answer» A. 1 in 250
253.

The tread of wheels is provided an outward slope of

A. 1 in 10
B. 1 in 15
C. 1 in 20
D. 1 in 25
Answer» C. 1 in 20
254.

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

A. Supported rail joint
B. Suspended rail joint
C. Bridge joint
D. Base joint
Answer» A. Supported rail joint
255.

To prevent percolation of water into formation, moorum is used as a blanket for

A. Black cotton soil
B. Sandy soil
C. Clayey soil
D. All the above
Answer» A. Black cotton soil
256.

Number of fish bolts per fish plate is

A. 2
B. 4
C. 5
D. 6
Answer» B. 4
257.

For flat bottom sleepers, maximum size of ballast, is

A. 50 mm
B. 40 mm
C. 33 mm
D. 25 mm
Answer» A. 50 mm
258.

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
Answer» A. 1 in 8'/2
259.

On Indian Railways standard length of rails for M.G. track, is

A. 33 ft (10.06 m)
B. 36 ft (10.97 m)
C. 39 ft (11.89 m)
D. 42 ft (12.8 m)
Answer» C. 39 ft (11.89 m)
260.

The nominal size of ballast used for points and crossings is

A. 25 mm
B. 40 mm
C. 50 mm
D. 10 mm
Answer» A. 25 mm
261.

The overall length of a turn out is the distance between the end of stock rail and

A. Heel of crossing
B. Actual nose of crossing
C. Throat of crossing
D. Toe of crossing
Answer» A. Heel of crossing
262.

The width of foot for 90 R rail section is

A. 100 mm
B. 122.2 mm
C. 136.5 mm
D. 146.0 mm
Answer» C. 136.5 mm
263.

Monnier, the inventor of R.C.C., suggested the introduction of reinforced cement concert sleepers for the railways in

A. 1857
B. 1867
C. 1877
D. 1887
Answer» C. 1877
264.

Switch angle depends on
(i) Heel divergence
(ii) Length of tongue rail
(iii) Flange-way 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)
Answer» A. (i) and (ii)
265.

Minimum packing space provided between two sleepers, is between

A. 20 to 25 cm
B. 25 to 30 cm
C. 30 to 35 cm
D. 35 to 40 cm
Answer» C. 30 to 35 cm
266.

Dog spikes are used for fixing rail to the

A. Wooden sleepers
B. CST-9 sleepers
C. Steel trough sleepers
D. Concrete sleepers
Answer» A. Wooden sleepers
267.

Distance between inner faces of the flanges, is kept

A. Equal to the gauge distance
B. Slightly less than the gauge distance
C. Slightly more than the gauge distance
D. None of these
Answer» B. Slightly less than the gauge distance
268.

Anti-creep bearing plates are provided on

A. Bridges and approaches
B. Joints
C. Both (A) and (B)
D. None of the above
Answer» D. None of the above
269.

A mono-block sleeper has

A. Square section
B. Rectangular section
C. Trapezoidal section
D. Semi-circular section
Answer» C. Trapezoidal section
270.

The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called

A. Flange-way clearance
B. Heel divergence
C. Throw of the switch
D. None of the above
Answer» C. Throw of the switch
271.

Coal ash (or cinder) is used in initial stages of a new construction of railway for

A. Wooden sleepers
B. Steel sleepers
C. Cast iron sleepers
D. None of these
Answer» A. Wooden sleepers
272.

Normally the limiting value of cant is

A. G/8
B. G/10
C. G/12
D. G/15
Answer» B. G/10
273.

Width of the top portion of a flat footed, rail, is

A. 69.85 mm
B. 63.50 mm
C. 66.77 mm
D. 136.52 mm
Answer» C. 66.77 mm
274.

Rails are bent to correct curvature if the degree of curve, is more than

A.
B.
C.
D.
Answer» D. 4°
275.

Minimum depth of ballast prescribed of B.G. trunk lines of Indian Railways, is

A. 20 cm
B. 15 cm
C. 25 cm
D. 30 cm
Answer» C. 25 cm
276.

Boxing of ballast is done

A. Under rails
B. At the rails
C. In between two rails
D. In between two sleepers
Answer» B. At the rails
277.

Maximum wheel base distance provided on Indian B.G. tracks, is

A. 4.096 m
B. 5.096 m
C. 6.096 m
D. 7.096 m
Answer» C. 6.096 m
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