RCC Structures Design MCQs

81. According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?

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A. Half of the width of the slab
B. Two -third of the width of the slab
C. Three-fourth of the width of the slab
D. Four-fifth of the width of the slab
✅ The correct answer is option C.

82. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?

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A. 14 cm 2
B. 15 cm2
C. 16 cm2
D. 17 cm2
✅ The correct answer is option C.

87. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than____________?

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A. 42 diameters from the centre of the column
B. 42 diameters from the inner edge of the column
C. 42 diameters from the outer edge of the column
D. 24 diameters from the centre of the column
✅ The correct answer is option C.

89. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?

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A. 300 cm
B. 233 cm
C. 176 cm
D. 236 cm
✅ The correct answer is option C.

90. If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is____________________?

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A. [( – )/2] h
B. [( + )/4] h
C. [( + )/2] h
D. ( – h
✅ The correct answer is option C.