1. In a simply supported slab the minimum spacing of distribution reinforcement, should be four times the effective thickness of the slab or
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Correct Answer:
60 cm
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2. The effective span of a simply supported slab, is
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Correct Answer:
Clear distance between the inner faces of the walls plus twice the thickness of the wall
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3. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than
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Correct Answer:
30 cm
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4. The live load to be considered for an inaccessible roof, is
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Correct Answer:
75 kg/m2
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5. The length of lap in tension reinforcement should not be less than the bar diameter x (actual tension / four times the permissible average bond stress) if it is more than
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Correct Answer:
30 bar diameters
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6. The advantage of reinforced concrete, is due to
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Correct Answer:
All these
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7. Thickened part of a flat slab over its supporting column, is technically known as
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Correct Answer:
Drop panel
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8. An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is
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Correct Answer:
8.3 kg/cm2
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9. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is
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Correct Answer:
58 d
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10. An R.C.C. column is treated as long if its slenderness ratio is greater than
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Correct Answer:
50
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11. An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is
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Correct Answer:
49.9 kg/cm2
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12. For M 150 mix concrete, according to I.S. specifications, local bond stress, is
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Correct Answer:
10 kg/cm2
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13. High strength concrete is used in prestressed member
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Correct Answer:
All these
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14. The width of the flange of a T-beam should be less than
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Correct Answer:
Least of these
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15. If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is
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Correct Answer:
0.696 %
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16. The weight of a foundation is assumed as
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Correct Answer:
10% of wall weight
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17. If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a
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Correct Answer:
Cantilever beam
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18. As per I.S. 456 - 1978, the pH value of water shall be
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Correct Answer:
Not less than 6
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19. For stairs spanning horizontally, the minimum waist provided is
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Correct Answer:
12 cm.
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20. Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by
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Correct Answer:
Rankine Grashoff formula
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