BSNL JTO (CE) Paper 2009 with Solutions Explanations at Doorsteptutor. Com Part 6

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14. Flood routing is a procedure to determine

a. Time and magnitude of flow at a point on a water course from known upstream hydrograph

b. The discharge over the spillway and through sluice gate

c. Reservoir storage

d. The head available at the power plant

15. Ideal fluids are those fluids which

a. Have no viscosity

b. Have viscosity

c. Have surface tension

d. Are compressible

16. Hygroscopic water is a film water chemically bound to soil particles by adhesive force and

a. Is available to plants

b. Is not available to plants

c. Can be drained out by plants

d. Is capable of movement by capillary force

17. Modern turbudimeters working on the principle of “Scattering of light” are known as

a. Optimeters

b. Tintometers

c. Nephelometers

d. pH meter

18. Pollution by depletion of ozone layer, threatenting the environment, is caused due to the reaction of ozone with

a. Carbon Monoxide

b. Chlorofluorocarbon (CFC)

c. Sulfur dioxide

d. Oxygen

19. The water to be used for boilers should preferably be

a. Hard

b. Potable

c. Corrosive

d. Soft

20. If Q is the flow rate of water into a rectangular sedimentation tank of length L, width B and height H, then the surface loading rate is given by,

a. Q/ (B. L)

b. Q/ (B. H)

c. B L H/Q

d. Q/B L H

21. A soil sample of specific gravity has void ratio of The gravimetric water content of the sample is . Its bulk unit weight is

a.

b.

c.

d.

22. A bulk weight of of silty soil of specific gravity is packed in a volume of . Oven dried weight of soil is The saturation of the sample is

a.

b.

c.

d. 60 %

23. For a falling head permeability test, there is a drop in head from in minutes. The area of stand pipe is and area of soil sample is . Length of soil sample is . The permeability of the soil sample is

a.

b.

c.

d.

24. A diameter concrete pile is driven into a homogenous clay deposit with cohesion equal to and adhesion factor equal to Embedded length of the pie is 10 m and safe load on the pile is . Assume equal to and there is both end resistance and shaft resistance. The factor of safety is

a.

b.

c.

d.

25. Sea bed is 200 m deep, which consist of sand with saturated unit weight of . Unit weight is . Effective stress at 5m below sea bed is

a.

b.

c.

d.

26. Coefficient of consolidation for a clay layer is given as . The time factor for degree of consolidation is . Liquid limit of clay is . The saturated clay layer is thick with double drainage condition. The time required for consolidation is

a.

b.

c.

d.

27. For an unconsolidated undrained (UU) test, major and minor principal stress for silty clay is 200 kN/m2 and 100 kN/m2, respectively. Shear strength parameters for this soil sample is

a.

b.

c.

d.

28. A vertical cut is made in a soil with shear strength parameters of and ′ . Coefficient of active earth pressure is . Unit weight of soil is . The active earth pressure at 4m depth is

a.

b.

c.

d.

29. A 10m thick clay layer with unit weight of overlies sandy deposit of 4m thick. The piezometric head at the bottom of the clay layer is . The safe depth of excavation possible in clay layer without causing instability is

a.

b.

c.

d.

30. The following bearings were observed in running a closed traverse by compass survey

Bearings for Question 30
LineFore bearingBack bearing
ab
bc
cd

Local attraction problem exists at stations:

a. c

b. d

c. a, b

d. All stations

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