RCC Structural Design Mock test – 5 || Civil Engineering Mock tests Welcome to your RCC Structures Design Mock test - 5 Take an exciting test in RCC structures Design You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1) 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 (A) 28 d (B) 38 d (C) 48 d (D) 58 d2) 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 these3) A foundation is called shallow if its depth, is (A) One-fourth of its width (B) Half of its width (C) Three-fourth of its width (D) Equal to its width4) A flat slab is supported (A) On beams (B) On columns (C) On beams and columns (D) On columns monolithically built with slab5) The toe projection of foundation slabs is taken (A) As one third of the base (B) As one sixth of overall height of the wall (C) Equal to heel slab (D) Below ground surface6) The horizontal portion of a step in a stairs case, is known as (A) Rise (B) Flight (C) Winder (D) Tread7) If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is (A) 37 cm (B) 38 cm (C) 39 cm (D) 40 cm8) 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 force9) If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least (A) WL/P (B) WL/2P (C) WL/3P (D) WL/4P10) A pre-stressed concrete member (A) Is made of concrete (B) Is made of reinforced concrete (C) Is stressed after casting (D) Possesses internal stresses11) In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at (A) Less loaded column (B) More loaded column (C) A point of the maximum shear force (D) A point of zero shear force12) An R.C.C. roof slab is designed as a two way slab if (A) It supports live loads in both directions (B) The ratio of spans in two directions is less than 2 (C) The slab is continuous over two supports (D) The slab is discontinuous at edges13) The diameter of longitudinal bars of a column should never be less than (A) 6 mm (B) 8 mm (C) 10 mm (D) 12 mm14) [A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by (A) Modular ratio method (B) Load factor method (C) Ultimate load method (D) None of these15) The shear reinforcement in R.C.C. is provided to resist (A) Vertical shear (B) Horizontal shear (C) Diagonal compression (D) Diagonal tension16) The live load to be considered for an inaccessible roof, is (A) Nil (B) 75 kg/m2 (C) 150 kg/cm2 (D) 200 kg/m217) 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 cm18) A circular slab subjected to external loading, deflects to form a (A) Semi-hemisphere (B) Ellipsoid (C) Paraboloid (D) None of these19) 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 cm2 (B) 15 cm2 (C) 16 cm2 (D) 17 cm220) 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 redesigning21) The radius of a bar bend to form a hook, should not be less than (A) Twice the diameter (B) Thrice the diameter (C) Four times the diameter (D) Five times the diameter22) If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than (A) WL/12 (L - 2D/3)² (B) WL/10 (L + 2D/3)² (C) WL/10 (L - 2D/3)² (D) WL/12 (L - D/3)²23) A pile of length carrying a uniformly distributed load per metre length is suspended at the centre and from other two points 0.15 L from either end ; the maximum hogging moment will be (A) WL²/15 (B) WL²/30 (C) WL²/60 (D) WL²/9024) 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) 5525) For stairs spanning horizontally, the minimum waist provided is (A) 4 cm (B) 6 cm (C) 8 cm (D) 12 cm