1) A circular slab subjected to external loading, deflects to form a_________________? a. Semi-hemisphere b. Ellipsoid c. Paraboloid d. None of these
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2) The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt________________? a. Is safe in shear b. Is unsafe in shear c. Is over safe in shear d. Needs redesigning
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3) If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be_________________? a. 5 cm b. 10 cm c. 15 cm d. 20 cm
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4) If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is_______________? a. 40 b. 45 c. 50 d. 55
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5) The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is___________________? a. 30° b. 40° c. 45° d. All the above
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6) The number of treads in a flight is equal to_______________? a. Risers in the flight b. Risers plus one c. Risers minus one d. None of these
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7) The shear reinforcement in R.C.C. is provided to resist__________________? a. Vertical shear b. Horizontal shear c. Diagonal compression d. Diagonal tension
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8) 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___________________? a. 14 cm 2 b. 15 cm2 c. 16 cm2 d. 17 cm2
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9) The amount of reinforcement for main bars in a slab, is based upon___________________? a. Minimum bending moment b. Maximum bending moment c. Maximum shear force d. Minimum shear force
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10) The minimum cube strength of concrete used for a pre-stressed member, is________________? a. 50 kg/cm2 b. 150 kg/cm 2 c. 250 kg/cm2 d. 350 kg/cm2
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11) If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by_____________? a. l = dt/Sb b. l = dt/2Sb c. l = dt/3Sb d. l = dt/4Sb
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12) effective depth and depth of the neutral axis respectively of a singly reinforced If d and n are the beam, the lever arm of the beam, is_________________? a. d b. n c. d + n/3 d. d – n/3
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13) bending moment of a simply supported slab is M Kg.cm, the effective depth of the If the maximum slab is (where Q is M.R. factor)________________? a. M/100Q b. M/ Q c. M/Q) d. (M/100Q)
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14) If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by_________________? a. 0.2 b. 0.3 c. 0.4 d. 0.5
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15) The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon____________________? a. Breadth of the rib b. Overall thickness of the rib c. Centre to centre distance between T-beams d. All the above
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16) Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to__________________? a. Shear force b. Area of the section c. Distance of the C.G. of the area from its neutral axis d. Moment of the beam section about its neutral axis
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17) Pick up the true statement from the following? a. Plain ceiling provides the best property diffusing light b. In the absence of beams, it is easier to install piping c. In the absence of beams, it is easier to paint d. All the above
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18) Pick up the correct statement from the following_? a. A pile is a slender member which transfers the load through its lower end on a strong strata b. A pile is a slender member which transfers its load to the surrounding soil c. A pile is a slender member which transfers its load by friction d. A pile is a cylindrical body of concrete which transfers the load at a depth greater than its width
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19) Dimensions of a beam need be changed if the shear stress is more than_______________? a. 10 kg/cm2 b. 15 kg/cm2 c. 20 kg/cm2 d. 25 kg/cm2
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20) The effective width of a column strip of a flat slab, is_______________? a. One-fourth the width of the panel b. Half the width of the panel c. Radius of the column d. Diameter of the column
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21) The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than_______________? a. 18 bar diameters b. 24 bar diameters c. 30 bar diameters d. 36 bar diameters
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22) As the percentage of steel increases________________? a. Depth of neutral axis decreases b. Depth of neutral axis increases c. Lever arm increases d. Lever arm decreases
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23) For a number of columns constructed in a rcjw, the type of foundation provided, is_______________? a. Footing b. Raft c. Strap d. Strip
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24) If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is___________________? a. [m/(m – r)] d b. [m/(m + r)] d c. [(m + r)/ m] d d. [(r – m)/m] d
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25) In a simply supported slab, alternate bars are curtailed at________________? a. 1/4th of the span b. 1/5th of the span c. 1/6th of the span d. 1/7th of the span
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26) Pick up the incorrect statement from the following_? a. In the stem of a retaining wall, reinforcement is provided near the earth side b. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab c. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab d. None of these
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27) Pick up the correct statement from the following__? a. Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling b. Lateral reinforcement prevents the shearing of concrete on diagonal plane c. Lateral reinforcement stops breaking away of concrete cover, due to buckling d. All the above
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