26. A rectangular beam 250 mm wide, 310 mm effective depth has 3 bars of 12 mm diameter HYSD grade Fe 415 steel bars. Concrete grade is M20. The ultimate moment of resistance of the beam is :
27. A cantilever steel beam of 3m span carries a udl of 10 kN/m inclusive of self weight. The beam comprises of ISMB200@198N/m. Web thickness = 5.4 mm, 1xx = 1696.6 cm4 and I = 115 cm4. The maximum bending stress and average shear stresses in Mpa are respectively:
28. In case of principal axes of a section :
29. In case of a beam of rectangular cross section simply supported over a span L and loaded with a central load W, length of elasto-plastic zone of the plastic hinge is :
30. The degree of static indeterminacy of a rigid-jointed space frame is :
31. For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal(i)of a stiffness matrix must be positive(ii)of a stiffness matrix must be negative(iii)of a flexibility matrix must be positive(iv)of a flexibility matrix must be negative The correct answer is :
32. In SPT, the test uses a thick-walled sample tube, with an outside diameter
33. Unconfined compressive strength is given by 120 kN/m2, what will be the unconfined shear strength or cohesion?
34. If a soil is fully saturated having void ratio 0.67 what will be the porosity?
35. ‘D60 is 9.6 mm, D30 is 2 mm and D10is 0.16 mm, what is the value of Cc (coefficient of curvature)?
36. Black cotton soils are :
37. The minimum value of camber provided for thin bituminous surface hill roads, is :
38. Maximum number of passenger-cars that can pass a given point on a road during one hour under the most ideal road way and traffic conditions, is known as :
39. The safe stopping sight distance D, may be computed from the equation :
40. Extra widening required at a horizontal curve on a single lane hill road of radius 80 m for a design speed of 50 km ph and for a vehicle with wheel base 6.0 m is :
41. Ryve’s formula for flood estimate in cumecs, is :
42. An inclined circular plate of diameter 2 m lies submerged in a liquid of specific gravity 0.9. The depth of the centroid of plate below the free surface is 1 meter. The hydrostatic pressure on one side of the plate in kN is :
43. A rectangular open channel carries a flow of 2 m3/sec/m, what is the value of mihimum specific energy?
44. A hydraulic model of a spill way is constructed with a scale 1:25. If the prototype discharge is 3125 cumec, then the corresponding discharge for which the model should be tested is :
45. High COD to BOD ratio of an organic pollutant represents :
46. Which is a secondary air pollutant?
47. Isopleth is a line which joins all the points having :
48. A flood discharge is to be estimated for design of a bridge across a river. If the designer intends to accept 25% risk that a flood of that or higher magnitude will occur in the next 15 years, the return period that the designer must use in the estimation of flood discharge is :
49. A waste water sample contains 10-56 mmoles/litre of hydroxyl ions at 25°C. The pH of the sample is :
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