RCC Structures Design Mock test – 6 || Civil Engineering Mock tests Welcome to your RCC Structures Design Mock test - 6 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) To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than (A) b/3 (B) b/4 (C) b/5 (D) b/62) If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than (A) 4 mm (B) 5 mm (C) 6 mm (D) 8 mm3) An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is (A) 49.9 kg/cm2 (B) 100 kg/cm2 (C) 250 kg/cm2 (D) 175 kg/cm24) Design of R.C.C. cantilever beams, is based on the resultant force at (A) Fixed end (B) Free end (C) Mid span (D) Mid span and fixed support5) In a singly reinforced beam, the effective depth is measured from its compression edge to (A) Tensile edge (B) Tensile reinforcement (C) Neutral axis of the beam (D) Longitudinal central axis6) If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is (A) d (B) n (C) d + n/3 (D) d - n/37) The weight of a foundation is assumed as (A) 5% of wall weight (B) 7% of wall weight (C) 10% of wall weight (D) 12% of wall weight8) Steel beam theory is used for (A) Design of simple steel beams (B) Steel beams encased in concrete (C) Doubly reinforced beams ignoring compressive stress in concrete (D) Beams if shear exceeds 4 times allowable shear stress9) If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is (A) 0.3 H (B) 0.4 H (C) 0.5 H (D) 0.7 H10) 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/4Sb11) For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is (A) wl²/4 (B) wl²/8 (C) wl²/12 (D) wl²/1612) The minimum cube strength of concrete used for a pre-stressed member, is (A) 50 kg/cm2 (B) 150 kg/cm2 (C) 250 kg/cm2 (D) 350 kg/cm213) If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is (A) K/x (1 + x/d) + bw (B) Kx (1 - x/l) + bw (C) Kx (1 + x/l) + bw (D) All the above14) On piles, the drop must be at least (A) 80 cm (B) 100 cm (C) 120 cm (D) 140 cm15) Distribution of shear intensity over a rectangular section of a beam, follows: (A) A circular curve (B) A straight line (C) A parabolic curve (D) An elliptical curve16) The maximum shear stress (q) in concrete of a reinforced cement concrete beam is (A) Shear force/(Lever arm × Width) (B) Lever arm/(Shear force × Width) (C) Width/(Lever arm × Shear force) (D) (Shear force × Width)/Lever arm17) Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as (A) 1/8th of the span (B) 1/10th of the span (C) 1/12th of the span (D) 1/16th of the span18) If diameter of a reinforcement bar is d, the anchorage value of the hook is (A) 4d (B) 8d (C) 12d (D) 16d19) Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at (A) Supports (B) Mid span (C) Every section (D) Quarter span20) If T and R are tread and rise respectively of a stair, then (A) 2R + T = 60 (B) R + 2T = 60 (C) 2R + T = 30 (D) R + 2T = 3021) Distribution reinforcement in a simply supported slab, is provided to distribute (A) Load (B) Temperature stress (C) Shrinkage stress (D) All the above22) In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called (A) Under-reinforced section (B) Over reinforced section (C) Economic section (D) Critical section23) If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is 10 kg/cm2, the share stirrups are provided for a distance from either end where, is (A) 50 cm (B) 100 cm (C) 150 cm (D) 200 cm24) The length of the straight portion of a bar beyond the end of the hook, should be at least (A) Twice the diameter (B) Thrice the diameter (C) Four times the diameter (D) Seven times the diameter25) The thickness of base slab of a retaining wall generally provided, is (A) One half of the width of the stem at the bottom (B) One-third of the width of the stem at the bottom (C) One fourth of the width of the steam at the bottom (D) Width of the stem at the bottom