1.Which of the statements with regard to formation is correct
(1) One of the Functions of the formation is to facilitate drainage
(2) Width of bank for double railway line is 12.155 meters
(3) Width of cutting for double railway track is 11.750 meters
(4) Centre to centre of formation for double line is 4.725 meters
(5) Width of formation is different for concrete sleeper track and other than concrete sleeper track
a) 2, 3, 5
b) 3, 4, 5*
c) 2, 3, 4
d) 2, 4, 5
Answer - b) 3, 4, 5*
2. Centre to Centre spacing of formation for double railway line for Broad Gauge is
a) 1676 mm
b) 4725 mm
c) 4265mm
d) 5300 mm*
Answer - d) 5300 mm*
3. Earthwork in embankment for railway with manual compaction should be done in layers not exceeding--------------
a) 15 centimeter
b) 20 centimeters
c) 25 centimeters
d) 30 centimeters*
Answer - d) 30 centimeters*
4. To provide inverted filter to improve the bearing capacity of soil the liquid limit of blanketing material should not be greater than
a) 5
b) 20
c) 27
d) 35*
Answer - d) 35*
5. To provide inverted filter to improve the hearing capacity of soil the plasticity index of blanketing material should not be greater than
a) 15*
b) 20
c) 27
d) 35
Answer - a) 15*
6. The bottom of side drains should be below the formation level by at least------------
a) 45 cm
b )30 cm*
c) 15 cm
d) 60 cm
Answer - b )30 cm*
7. Cross slope of the formation to have good drainage of Ballast section is
a) 1 in 40*
b) 1 in 50
c) 1 in 30
d) 1 in 20
Answer - a) 1 in 40*
8. The side slope of formation in embankment is
a) 2 : 1*
b) 1: 1
c) 1:5
d) 1:3
Answer - a) 2 : 1*
9. The side slope of formation in embankment /cutting depends on
a) Shearing strength of soil and its angle of repose*
b) Angle of repose
c) Bearing capacity of the soil
d) Optimum moisture content of the soil
Answer - a) Shearing strength of soil and its angle of repose*
10. The recommended width of Double line cutting formation for B G is
a) 10210 mm
b) 10 975 mm
c) 11555 mm*
d) 10 820 mm
Answer - c) 11555 mm*
11. The recommended width of Single line formation cutting for BG excluding drain is
a) 6250 mm*
b) 6850mm
c) 54 90mm
d) 6100mm
Answer - a) 6250 mm*
12. In case of compaction of soil by sheep foot roller maximum thickness of layer should not exceed buy more than -------------- centimeter of length of their teeth
a) 5 centimeter*
b) 4 centimeter
c) 3 centimeter
d) 2 centimeter
Answer - a) 5 centimeter*
13. The catch water drains are provided in the
a) Formation in the embankment
b) Formation in cutting*
c) Zero fills formation
d) Steep gradient
Answer - b) Formation in cutting*
14. Cross sectional area of catch water drain should not be more than
a) 0 .75 square meter*
b) 0. 90 square meter
c) 0. 80 square meter
d). 50 square meter
Answer - a) 0 .75 square meter*
15. Density of each compacted layer should be ascertained by taking soil samples on either side of Central Line at
a) 5 meter interval
b) 10 meter interval*
c) 12 meter interval
d) 15 meter internal
Answer - b) 10 meter interval*
16. For laying a Railway track the prepared surface ready to receive the ballast is called
a) Sub ballast
b) Formation*
c) Blanket
d) Cushion
Answer - b) Formation*
17. The height of formation depends upon the
a) Ground contours and the gradient adopted*
b) Ground contour only
c) Gradient adopted only
d) Rainfall intensity over the year
Answer - a) Ground contours and the gradient adopted*
18. The dry density of soil is
a) Always greater than the saturated density
b) Weight of soil solids per unit of total volume prior to drying*
c) Total weight of soil solids per unit of its total volume
d) Total weight of soil mass per unit of its total volume
Answer - b) Weight of soil solids per unit of total volume prior to drying*
19. The ratio of volume of water present in a given soil sample to the total volume of voids in it is known as
a) Percentage of air voids
b) Degree of saturation *
c) Void ratio
d) Porosity
Answer - b) Degree of saturation *
20. The ratio of volume of air voids to the volume of voids is known as
a) Percentage of air voids
b) Porosity
c) Degree of saturation
d) Air content*
Answer - d) Air content*
21. At the liquid limit
a) The soil just begins to crumble when rolled into a thread
b) The shearing strength against flowing is negligible
c) The shearing strength against flowing is a small but definite*
d) The soil will not get fully saturated
Answer - c) The shearing strength against flowing is a small but definite*
22. The property of soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change is known as
a) Porosity
b) Plasticity*
c) Stiffness
d) Plastic limit
Answer - b) Plasticity*
23. The minimum water content in soil at which the soil just begins to crumble when rolled into threads 3 mm in diameter is known as
a) Plastic limit
b) Liquid limit
c) Consistency limit
d) Shrinkage limit
Answer -
24. The minimum water content at which a reduction in water content will not cause a decrease in the volume of a soil mass is known as
a) Plastic limit
b) Shrinkage limit*
c) Liquid limit
d) Consistency limit
Answer - b) Shrinkage limit*
25. The numerical difference between the liquid limit and plastic limit of a soil is known as
a) Liquidity index
b) Plasticity index *
c) Shrinkage index
d) Consistency index
Answer - b) Plasticity index *
26. In India soils are classified by
a) MIT classification
b) Unified soil classification system*
c) International classification system
d) Particle size classification
Answer - b) Unified soil classification system*
27. The consistency index of soil is
a) (Natural water content - liquid limit) / plasticity index
b) (Natural water content - liquid limit )/ liquidity index
c) (Liquid limit - natural water content)/ consistency index
d) (Liquid limit - natural water content)/plasticity index*
Answer - d) (Liquid limit - natural water content)/plasticity index*
28. The property of a soil due to which water percolates through it is known as
a) Porosity
b) Permeability*
c) Moisture content
d) Capillarity
Answer - b) Permeability*
29. Permeability of soil varies
a) Inversely as square of grain size
b) Inversely as grain size
c) Directly as grain size
d) Square of grain size*
Answer - d) Square of grain size*
30. Quicksand is
a) Moist sand containing a small percentage of clay
b) Is a condition which generally occurs in coarse sands
c) Is a condition in which cohesive properties of soil increase rapidly
d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water*
Answer - d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water*
31. Piping in a soil mass is
a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit*
b) Caused due to very low exit gradient
c) Due to continuous passage of water through a series of well connected pores
d) Due to loss of the strength of cohesion less soil because of upward flow of of water
Answer - a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit*
32. The maximum dry density to which a soil may be compacted to depends upon
a) Soil water content *
b) The process of compaction
c) The voids ratio
d) Is independent of the type of soil
Answer - a) Soil water content *
33. A saturated clay is to be tested for shearing strength. Which test should be recommended?
a) Direct shear test
b) Triaxial shear test
c) Vane shear test
d) Unconfined compression*
Answer - d) Unconfined compression*
34. A temporary enclosure in a river or Lake built around a working area for the purpose of excluding water during construction is known
a) Caisson
b) Augur
c) Cofferdam *
d) Sheet pile wall
Answer - c) Cofferdam *
35. The maximum pressure which the soil can carry safely without the risk of shear failure is called
a) Safe bearing capacity
b) Ultimate bearing capacity*
c) Allowable bearing capacity
d) Shear bearing capacity
Answer - b) Ultimate bearing capacity*
36. Black cotton soils are
a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by decomposition of rocks by long continued weathering*
b) Compacted and laminated clays
c) Soils containing carbon of coal underneath
d) Dark brown earthy materials formed due to partial or complete decomposition of vegetable matter
Answer - a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by decomposition of rocks by long continued weathering*
37. The high density of soil placed in a fill is desired in order to
a) Increase its shear resistance*
b) Reduce its shear resistance
c) Promote future settlements
d) Decrease percolation through the fill.
Answer - a) Increase its shear resistance*
38. Plasticity index represents the range of water content between
a) Liquid and plastic limit *
b) Plastic limit and semi solid limit
c) Semisolid Limit and liquid limit
d) Liquid limit and solid limit.
Answer - a) Liquid and plastic limit *
39. For yard drainage Pucca drains should be designed for the velocity of
a) 0 05 to 1 meter per second
b) 1 to 1.5 meter per second
c) 1.5 to 2 meter per second
d) 2 to 2.5 meter per second
Answer -
40. Formation prepared by depositing Soil over the existing ground level is known as
a) Formation in cutting
b) Formation in embankment
c) Zero fills formation
d) Natural formation
Answer -
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