Generally acceptable nominal size of aggregates for reinforced concrete, is 10 m

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Question
Generally acceptable nominal size of aggregates for reinforced concrete, is
Options
A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm
E. 40 mm

Correct Answer

20 mm

Structural Design Specifications problems

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1. If f_ck is the characteristic cube strength of concrete in N/mm², the modulus of elasticity of structural concrete E_c = af_ck where the value of a, is
Options
A. 5900
B. 5800
C. 5700
D. 5600
E. 5500

6. The minimum horizontal distance between two parallel main reinforcing bars, is
Options
A. the diameter of the bar if their diameters are same
B. the diameter of the longer bar if their diameters are unequal
C. 5 mm more than nominal maximum size of the coarse aggragate
D. greatest value of the above.

7. Removal of props under
Options
A. slabs spanning upto 4.5 m is 7 days
B. slabs spanning more than 4.5 m is 14 days
C. beams spanning upto 6 m is 14 days
D. beams spanning more than 6 m is 21 days
E. all the above.

8. Pick up the correct statement for the web stiffeners.
Options
A. vertical stiffeners are spaced at a distance not greater than 1.5 d and not less than 0.33 d
B. d is the distance between flange angles or the clear distance between flanges
C. for horizontal stiffeners, d is the clear distance between the horizontal stiffener and the tension flange
D. all the above.

9. Bending moment values for filler joists
Options
A. near middle of end span is +
B. at support next to end support is -
C. at middle of interior spans is +
D. at other interior supports is -
E. all the above.

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