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INDIABIX > railway > Flashcards

railway Flashcards

1
Q

A CST-9 sleeper consists of

A

two inverted triangular pots on either side of rail seat
a central plate with a projected key and box on the top of plate
a tie bar and 4 cotters to connect two cast iron plates
a single two way key provided on the gauge side to hold the rail to sleeper

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2
Q

Charles Vignoles invented the flat footed rails in

A

1836

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3
Q

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

A

20~25 cm

25 cm on indiabix

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4
Q

Best ballast contains stones varying in size from

A

Minimum ballast size 19mm.

Maximum size 50.8 mm.

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5
Q

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

A

44 mm for BG and MG routes and 41 mm for NG routes.

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6
Q

Pot sleepers are in the form of

A

two bowls placed under each rail and connected together with a tie bar

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7
Q

A kink is made in stock rails, ahead of the toe of switch at a distance of

A

15 cm

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8
Q

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

A

3 degree other sources

4 degree indiabix

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9
Q

In India the rails are manufactured by

A

[A]. open hearth process

[B]. duplex process

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10
Q

A scissors cross-over consists of angles

A

four pairs of points, six acute angle crossings and two obtuse angle crossings

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11
Q

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

A

teak

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12
Q

Overall depth of a dog spike, is

A

120.6 mm

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13
Q

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

A

6.096 m

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14
Q

what are used to fix flat footed rails to the wooden sleepers

A

bearing plates

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15
Q

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

A

BG = 1.11 m3
and
MG = .767. m3

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16
Q

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

A

Undercut switch: used for N.G track.
Overriding: For B.G & M.G track.
Straight cut: For bull-headed Rail.

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17
Q

For flat bottom sleepers, maximum size of ballast, is

A

For wooden sleeper 50mm. (indiabix)
For steel sleeper 40mm.
For RCC 25mm.

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18
Q

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

A

66.77 mm

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19
Q

Minimum packing space provided between two sleepers, is between

A

the distance b/w the two sleepers at the joint is 30-35cm or to max 55cm, and rest of that up to 75cm

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20
Q

A scissors cross over consists of one diamond and _____ turnouts ?

A

4 turnouts

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21
Q

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

BG=135.

MG=119&.
NG=100.

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22
Q

Type of switch rails generally adopted for modern track, is

A

curved switch

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23
Q

By interchanging gibs and cotters of a pot sleeper, gauge may be slackened by

A

3.2 mm

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24
Q

Composite sleeper index determines

A

suitability of wodden sleepers

Composite sleeper index The composite sleeper index (CSI), which evolved from a combination of the properties of strength and hardness, is an index used to determine the suitability of a particular timber for use as a sleeper from the point of view of mechanical strength.

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25
Q

Indian Railways detects the rail flow by

A

Kraut Kramer Rail flow detector.

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26
Q

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

A

9.5m

27
Q

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

A

1877

28
Q

Type of sleeper – Minimum CSI

A

Track sleeper – 783
Crossing sleeper – 1352
Bridge sleeper – 1455

29
Q

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

A

(S+ 10.H ) / 20

30
Q

In Indian railways, plate laying is usually done by

A

telescopic method

31
Q

Maximum cant deficiency prescribed on Indian Board Gauge Railways, is

A

For upto 100 kmph.

Speed CD=7.6 cm &
for speed > 100 kmp CD=10 cm.

32
Q

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

A

11.89 m

33
Q

The standard dimensions of a wooden sleeper for M.G. railway track are

A

Bg - 2.75m25cm.13cM.
Mg - 1.83m20cm11cm.
Ng - 1.54m15cm.10cm.

34
Q

To avoid the damage of nose of crossing, the wing rails are ramped so that nose of crossing remains at a lower level by

A

3 mm

35
Q

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

A

6 degree

36
Q

The distance between theoretical nose of crossing and actual nose of crossing for practical purposes, is

A

Nose thickness x cot α

37
Q

Widening of gauge is provided if degree of the curve, is

A

more then 4.5°

38
Q

Sand may be used as ballast for

A

cast iron sleepers

39
Q

cast iron sleeper is

A

Cast iron sleeper, is

[A].	pot sleeper
[B].	box sleeper
[C].	Duplex sleeper
[D].	plate sleeper
all correct
40
Q

On Indian Railways, angle of crossing between gauge faces of Vee, is generally calculated by

A

cole’s method

41
Q

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

A

G + 1.5 mm

42
Q

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

A

1 in 8.5 B.G. and, 1 in 12 M.G

43
Q

On either side of the centre line of rails, a cant of 1 in 20 in the sleeper is provided for a distance of

A

175 mm

44
Q

On Indian Railways, the approximate weight of a rail section is determined from the formula

A

weight of rail / axial load of locomotive = 1 / 510

45
Q

Steel sleepers are

A

6 mm thick steel sheets with ends bent down

46
Q

The check rails are placed opposite the crossing wrt nose of crossing

A

The check rails are placed opposite the crossing so that its two-third length is ahead of the nose of crossing

47
Q

Staggered rail joints are generally provided

A

on curves

48
Q

Bull headed rails are generally provided on

A

points and crossing

49
Q

Length of stock rail ahead of the toe should be

A

Length of stock rail ahead of the toe should be a minimum of 1.65 m

50
Q

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

A

40mm

51
Q

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

A

> 8°

52
Q

Burnettising is done for the preservation of

A

wooden sleepers

53
Q

For inspection and packing of ballast, each pot sleeper is provided with ____ holes

A

three holes

54
Q

The effective bearing area of all types of sleepers, is

A

0.46 m2

55
Q

Pick up the correct statement from the following:

A. An extra width of 7.5 cm ballast isprovided on outside a curve if track is laid with short welded rails
B. An extra width of 7.5 cm ballast isprovided on outside a curve sharper than 3° on B.G. and M.G. tracks
C. An extra width of 15 cm ballast is provided on each shoulder if the track is laid with welded rails
D. All the above.

A

Pick up the correct statement from the following:

A. An extra width of 7.5 cm ballast isprovided on outside a curve if track is laid with short welded rails
B. An extra width of 7.5 cm ballast isprovided on outside a curve sharper than 3° on B.G. and M.G. tracks
C. An extra width of 15 cm ballast is provided on each shoulder if the track is laid with welded rails
D. All the above.

56
Q

For points and crossings, maximum size of ballast, is

A

25 mm
else
50 mm

57
Q

If a is average number of peaks more than 10 mm of uneveness per kilometre, b is average number peaks more than 6 mm for gauge variation per kilometre and c is average number of peaks more than 2 mm twist per metre, then composite current recording index (Ic), as recommended by Indian Northern Railways, is

A

Ic = 40 - a - b - c/4

58
Q

The standard width of ballast for M.G. track in Indian Railways, is kept

A
  1. 30 m
  2. 35 m for B.G.
  3. 8 m for N.G.
59
Q

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

A

4

60
Q

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

A

512

61
Q

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

A

1455

62
Q

f the stock rails are B.H. rails, the type of switch generally provided, is

A

straight cut.

63
Q

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

A

BG - 540m.
MG - 400m.
Fouling mark is 305m.

INDIABIX (17 decks)

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