270+ Railway Bridge and Tunnel Engineering Solved MCQs

101.

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. Proceed
102.

If D is distance between centres of two parallel track of gauge G, then, total length of cross-over (from the point of commencement to the point of termination) with an intermediate straight portion and N crossing, is given by

A. DN + G [N + N2)]
B. DN + G [2N + N2)]
C. DN + G [3N + N2)]
D. DN + G [4N + N2)]
Answer» C. DN + G [3N + N2)]
103.

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. At an inward slope of 1 in 20
104.

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
Answer» B. 22.5 tonnes
105.

The type of switch generally used for B.G. and M.G. tracks, is

A. Articulated
B. Undercut
C. Over riding
D. Straight cut
Answer» C. Over riding
106.

For an effective administration, Indian railway system has been divided into

A. Four railway zones
B. Six railway zones
C. Seven railway zones
D. Nine railway zones
Answer» D. Nine railway zones
107.

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. A rad
Answer» B. cot A
108.

Heel divergency, the distance between the running faces of stock rail and gauge face of tongue rail, as recommended for Indian B.G. tracks, is

A. 100 mm
B. 119 mm
C. 125 mm
D. 135 mm
Answer» D. 135 mm
109.

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. All the above
110.

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. 700 MPa
111.

On Indian Railways standard length of rails for B.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» D. 42 ft (12.8 m)
112.

Wing rails are provided

A. Near tongue rails
B. Near check rails
C. Near stock rails
D. In crossing
Answer» D. In crossing
113.

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

A. 1 : 1
B. 1.5 : 1
C. 2 : 1
D. 1 : 2
Answer» C. 2 : 1
114.

If S and H are strength and hardness index of a timber at 12% moisture content, the composite sleeper index, is

A. (H + 10S)/20
B. (S + 10H)/20
C. (20S + H)/10
D. (S + 20H)/10
Answer» B. (S + 10H)/20
115.

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. (D - G - G )
116.

To achieve best performance, the type of switch preferred to, is

A. Undercut switch
B. Straight-cut switch
C. Overriding switch
D. Both (a) and (b)
Answer» C. Overriding switch
117.

On B.G. tracks the distance of outer signal from station limit is kept

A. 510 m
B. 520 m
C. 530 m
D. 540 m
Answer» D. 540 m
118.

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. 50 mm
119.

The weight of the rails depends upon

A. Gauge of the tracks
B. Speed of trains
C. Spacing of sleepers
D. All the above
Answer» D. All the above
120.

The main advantage of a long rail over short one, is

A. It requires less number of rail fastenings
B. It provides smooth running of trains
C. It involves less maintenance cost
D. All the above
Answer» D. All the above
121.

In a scissors crossover, 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)
Answer» B. (i) and (iv)
122.

Rail section first designed on Indian railways, was

A. Double headed
B. Bull headed
C. Flat footed
D. (a) and (b) simultaneously
Answer» A. Double headed
123.

The lengths of the standard crossings in India for Broad gauge and Metre gauge tracks is same for

A. 1 in 8½ B.G. and, in 12 M.G.
B. 1 in 12 B.G. and, 1 in 16 M.G.
C. 1 in 12 B.G. and 1 in 8½ M.G.
D. 1 in 16 B.G. and 1 in 12 M.G.
Answer» A. 1 in 8½ B.G. and, in 12 M.G.
124.

For the purpose of track maintenance, the number of turn out equivalent to one track km is

A. 1
B. 2
C. 5
D. 10
Answer» D. 10
125.

Dimensions of a plate girder are:

A. 851 mm × 851 mm
B. 255 mm × 254 mm
C. 851 mm × 254 mm
D. 551 mm × 254 mm
Answer» C. 851 mm × 254 mm
126.

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. Its two-third length is ahead of the nose of crossing
127.

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
Answer» D. 3, 1, 2, 4
128.

Check rails are provided on inner side of inner rails if sharpness of a B.G. curve, is more than

A.
B.
C.
D.
Answer» D. 8°
129.

Largest percentage of material in the rail is in its

A. Head
B. Web
C. Foot
D. Head and foot both
Answer» A. Head
130.

The spread between the point and splice rails at a distance of 4.25 m is 50 cm. The size of the crossing is

A. 1 in 6
B. 1 in 8½
C. 1 in 12
D. 1 in 16
Answer» B. 1 in 8½
131.

Packing of ballast is done

A. Near the ends of sleepers
B. On the shoulders
C. Under sleepers
D. Between two rails
Answer» C. Under sleepers
132.

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

A. 10 mm
B. 13 mm
C. 16 mm
D. 19 mm
Answer» D. 19 mm
133.

The rail section which is not used on Indian Broad Gauge tracks, is

A. 35 R
B. 40 R
C. 45 R
D. 55 R
Answer» B. 40 R
134.

In a diamond crossing, numbers of noses are

A. 2
B. 3
C. 4
D. 6
Answer» D. 6
135.

Number of cotters used in CST-9 sleepers is

A. 2
B. 3
C. 4
D. 5
Answer» C. 4
136.

In Indian railways, plate laying is usually done by

A. Side method
B. Telescopic method
C. American method
D. All the above
Answer» B. Telescopic method
137.

Pick up the correct statement from the following:

A. The line which connects a number of parallel tracks, and also provides an access to main track, is called a gathering line
B. With a diagonal gathering line, the length of the siding decreases with increase of its distance from main track
C. To have sidings of same length, a diagonal line is laid at one end and a parallel gathering line at the other end
D. All the above
Answer» D. All the above
138.

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. 65 mm
139.

The angle between the gauge faces of the stock rail and tongue rail, is called

A. Switch angle
B. Angle of crossing
C. Angle of turnout
D. None of these
Answer» A. Switch angle
140.

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. All the above
141.

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
Answer» C. Traverser
142.

If absolute levels of rails at the consecutive axles A, B, and C separated by 1.8 metres are 100.505 m, 100.530 m, and 100.525 m respectively, the unevenness of rails, is

A. 0.065 m
B. 0.055 m
C. 0.045 m
D. 0.035 m
Answer» A. 0.065 m
143.

Spacing of sleepers

A. Throughout the length of a rail is kept uniform
B. Near rail joints, is kept closer
C. At the middle of rails, is kept closer
D. None of these
Answer» C. At the middle of rails, is kept closer
144.

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
Answer» B. -0.168 cm
145.

Distance between the inner rail and check rail provided on sharp curve, is

A. 40 mm
B. 42 mm
C. 44 mm
D. 46 mm
Answer» C. 44 mm
146.

30 m long rails are used in

A. India
B. U.K.
C. Russia
D. U.S.A.
Answer» D. U.S.A.
147.

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. 13.21
148.

Overall depth of a dog spike, is

A. 120.6 mm
B. 155.90 mm
C. 135 mm
D. 150 mm
Answer» A. 120.6 mm
149.

To prevent creep in rails, the steel sleepers are fixed with rails by clips, bolts and

A. One key
B. Two keys
C. Three keys
D. Four keys
Answer» D. Four keys
150.

52 kg rails are mostly used in

A. Broad Gauge
B. Metre Gauge
C. Narrow Gauge
D. Both (A) and (B)
Answer» A. Broad Gauge
151.

Safe speed (V) on a curve of radius 970 metres provided with two transition curves on Board Gauge track, is

A. 112 km/hour
B. 122 km/hour
C. 132 km/hour
D. 142 km/hour
Answer» C. 132 km/hour
152.

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. More than 4½°
153.

The height of the rail for 52 kg rail section is

A. 143 mm
B. 156 mm
C. 172 mm
D. 129 mm
Answer» B. 156 mm
154.

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. All the above
155.

Anti-creep anchors are fixed to rails by

A. Wedging
B. Spring grip
C. Clamping
D. All the above
Answer» D. All the above
156.

Sleeper density in India is normally kept as

A. (M + 2) to (M + 7)
B. M to (M + 2)
C. (M + 5) to (M + 10)
D. MM
Answer» A. (M + 2) to (M + 7)
157.

Composite sleeper index determines

A. Number of sleepers per rail length
B. Suitability of wooden sleepers
C. Permissible stresses in steel sleepers
D. None of these
Answer» B. Suitability of wooden sleepers
158.

If G is gauge distance and a is crossing, the distance between the nose of acute crossing and nose of obtuse crossing of a rail diamond, measured along the rail not forming the diamond, is

A. G
B. G
C. G
D. G
Answer» A. G
159.

Loose jaws of steel trough sleepers are made of

A. Cast steel
B. Mild steel
C. Cast iron
D. Spring steel
Answer» D. Spring steel
160.

Regional Indian railways use different types of sleepers according to their

A. Availability
B. Economy
C. Suitability
D. All the above
Answer» D. All the above
161.

In Indian railways, the ratio of axle load and weight of rail, is

A. 312
B. 412
C. 512
D. 600
Answer» C. 512
162.

Maximum value of 'throw of switch' for Broad Gauge track is

A. 89 mm
B. 95 mm
C. 100 mm
D. 115 mm
Answer» D. 115 mm
163.

Top surface of steel sleepers, is

A. Kept level throughout
B. Provided a cant of 1 in 20 inward
C. Provided a cant of 1 in 20 outward
D. None of these
Answer» B. Provided a cant of 1 in 20 inward
164.

If D distance between the noses of crossing measured parallel to the main track, is

A. D
B. D
C. D
D. D
Answer» B. D
165.

Metal sleepers are superior to wooden sleepers with respect to

A. Cost
B. Life
C. Track circuiting
D. Fastening
Answer» B. Life
166.

Charles Blacker Vignoles invented the flat footed rails in

A. 1814
B. 1836
C. 1846
D. 1856
Answer» B. 1836
167.

A triangle of railway consists of

A. Three turn outs
B. One turn out and two diamonds
C. Two turn outs and one split
D. One turn out, one split and one diamond
Answer» C. Two turn outs and one split
168.

A treadle bar is used for

A. Interlocking points and signal
B. Setting points and crossings
C. Setting marshalling yard signals
D. Track maintenance
Answer» A. Interlocking points and signal
169.

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. h = L²/8R
170.

For metal sleepers with rounded edges, maximum size of ballast, is

A. 50 mm
B. 40 mm
C. 30 mm
D. 25 cm
Answer» B. 40 mm
171.

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. 67 mm
172.

Rail joint supported on a single sleeper, is known

A. Suspended rail joint
B. Bridge rail joint
C. Supported rail joint
D. Square rail joint
Answer» C. Supported rail joint
173.

Each block of a two-block concrete sleeper is

A. 722 mm × 295 mm × 271 mm and 215 kg in weight
B. 250 mm × 154 mm × 196 mm and 260 kg in weight
C. 525 mm × 350 mm × 275 mm and 280 kg in weight
D. None of these
Answer» A. 722 mm × 295 mm × 271 mm and 215 kg in weight
174.

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

A. 6.10 m
B. 8.84 m
C. 10.21 m
D. 10.82 m
Answer» C. 10.21 m
175.

Arrangement made to divert the trains from one track to another, is known as

A. Railway point
B. Railway crossing
C. Turnout
D. Railway junction
Answer» C. Turnout
176.

The standard dimensions of a wooden sleeper for a B.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 cm × 20 cm × 12 cm
Answer» A. 2.74 m × 25 cm × 13 cm
177.

The limiting value of cant excess for Broad Gauge is

A. 55 mm
B. 65 mm
C. 75 mm
D. 100 mm
Answer» C. 75 mm
178.

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. Kraut Kramer Rail flow detector
179.

The gradient on which an additional engine is required to negotiate the gradient, is called

A. Momentum gradient
B. Pusher gradient
C. Ruling gradient
D. Steep gradient
Answer» B. Pusher gradient
180.

If D is distance between centres of two parallel tracks of gauge G with entire curved leads and equal angles of crossing, total length of crossover, is

A. D (4R - 2G - D)]
B. D (3R - 2G -D)]
C. D (3R + 2G - D)]
D. D (4 + 2G - D)]
Answer» A. D (4R - 2G - D)]
181.

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
Answer» C. Iock bar
182.

Pot sleepers are used if degree of the curve does not exceed

A.
B.
C.
D.
Answer» A. 4°
183.

Burnettising is done for the preservation of

A. Wooden sleepers
B. Rails
C. Ballast
D. None of these
Answer» A. Wooden sleepers
184.

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. 1 and 2 are correct
B. 3 and 4 are correct
C. 1 and 4 are correct
D. 2 and 3 are correct
Answer» D. 2 and 3 are correct
185.

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. 15 cm
186.

Rails are fixed on steel sleepers

A. By bearing plates
B. By dog spikes
C. By keys in lugs or jaws
D. None of these
Answer» C. By keys in lugs or jaws
187.

Largest dimension of a rail is its

A. Height
B. Foot width
C. Head width
D. Any of the above
Answer» A. Height
188.

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. 40 R
189.

Advantage of automatic signalling, is:

A. Increased safety
B. Reduction in delays
C. Increase in track capacity
D. All the above
Answer» D. All the above
190.

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

A. Broad Gauge
B. Meter Gauge
C. Narrow Gauge
D. Any of the above
Answer» C. Narrow Gauge
191.

Coning of wheels

A. Prevent lateral movement of wheels
B. Provide smooth running of trains
C. Avoid excessive wear of inner faces of rail
D. All the above
Answer» D. All the above
192.

An extra 7.5 cm ballast width is not provided on outer side on a curve, if its degree is

A.
B.
C.
D.
Answer» D. 3°
193.

Standard size of wooden sleeper for Broad Gauge track is

A. 275 × 25 × 13 cm
B. 180 × 20 × 11.5 cm
C. 225 × 23 × 13 cm
D. 250 × 26 × 12 cm
Answer» A. 275 × 25 × 13 cm
194.

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. 3.2 mm
195.

The main function of sleepers, is

A. To support rails
B. To hold rails at correct gauge
C. To distribute load from the rails to ballast
D. All the above
Answer» D. All the above
196.

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
Answer» B. 1 in 720
197.

The spike commonly used to fix rails to wooden sleepers in Indian railways, is

A. Dog spike
B. Screw spike
C. Round spike
D. All the above
Answer» D. All the above
198.

Track construction involves preparation of

A. Sub-grade
B. Plate laying
C. Ballasting
D. All the above
Answer» D. All the above
199.

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. (i) and (ii)
200.

According to Indian Railway Board, no diamond crossing should be flatter than

A. 1 in 6
B. 1 in 8½
C. 1 in 12
D. 1 in 16
Answer» B. 1 in 8½
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