All reinforcement should be free from loose mill scales loose rust paints oil

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all the above.

Structural Design Specifications problems

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1. If b is actual width of a flange, D_t is the thickness of the flange, b_? is the breath of the web, l_o is the distance between the points of zero moments in a beam, the effective width of the flange, is
Options
A.
B.
C.
D.

2. Pick up the correct statement from the following:
Options
A. For steel castings, the minimum tensile strength is 41 kg/mm² and minimum yield stress is 20.5 kg/mm²
B. For mild steel the minimum tensile strength is 44 kg/mm² and minimum elongation of 23% on a gauge length of 5.65A
C. For high tensile steel, the minimum tensile strength is 58 kg/mm²
D. All the above.

3. In the formula a + bk for the calculation of the net effective section of single tee in tension connected by flange to the same side of the same side of the gusset, the value of 'k' is taken
Options
A.
B.
C.
D.

4. A solid slab spanning in two directions at right angles and carrying a uniformly distributed load, is supported on beams. If the length of two such beams A and B perpendicular to each other are x and y (x<y), the load shared by the beam A, is
Options
A.
B.
C.
D.

5. Pick up the correct statement from the following:
Options
A. The diameter of a rivet, before driving is taken as the nominal diameter of the rivet
B. The diameter of the rivet hole is taken as the gross area of the rivet
C. For rivets of nominal diameters less than 25 mm, the diameter of the rivet hole is taken as the nominal diameter of the rivet plus 1.5 mm
D. For rivets of nominal diameters exceeding 25 mm, the diameter of the rivet hole is taken as the nominal diameter of the rivet plus 2 mm
E. All the above.

6. To achieve uniform colour and consistency of the concrete by using ordinary Portland cement, the mixing time may be
Options
A. to 1 minute
B. 1 to minutes
C. to 2 minutes
D. 2 to minutes
E. none of these.

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