Civil Engineering – RCC structures Mock test – 3 Welcome to your RCC Structures Design Mock test - 3 Take an exciting test in RCC Structures You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1. If H 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. 0.6 H E. 0.7 H2. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength A. 100 kg/cm2 B. 200 kg/cm2 C. 300 kg/cm2 D. 400 kg/cm23. If C is creep coefficient, f is original prestress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: A. (1 - C)mf - eE B. (C - 1)mf + eE C. (C - 1)mf - eE D. (1 - C)mf + eE4. If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment A. WL/2 B. WL/4 C. WL/8 D. WL/12 E. WL/65. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or A. 12 bar diameters B. 18 bar diameters C. 24 bar diameters D. 30 bar diameters E. 36 bar diameters6. 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 edges.7. 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 equidistant from either column D. a point of the maximum shear force E. a point of zero shear force.8. If diameter of a reinforcement bar is d, the anchorge value of the hook is A. 4d B. 8d C. 12d D. 16d9. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as A. Freyssinet system B. Magnel-Blaton system C. C.C.L. standard system D. Lee-McCall system.10. 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 section.11. 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 cm12. The thickness of the flange of a Tee beam of a ribbed slab is assumed as A. width of the rib B. depth of the rib C. thickness of the concrete topping 0d) half the thickness of the rib D. twice the width of the rib13. In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are A. 6 legged B. 8 legged C. 10 legged D. 12 legged E. none of these.14. A flat slab is supported A. on beams B. on columns C. on beams and columns D. on columns monolithicaily built with slab15. 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 support.16. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than A. one diameter of thinner bar B. one diameter of thicker bar C. sum of the diameters of Thinner and thicker bars D. twice the diameter of thinner bar17. 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. 1/8 th of span B. 1/10 th of span C. 1/12 th of span D. 1/16 th of span E.1/20 th of span18. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is A. 51.5 B. 52.5 C. 53.5 D. 54.519. A raft foundation is provided if its area exceeds the plan area of the building by A. 10% B. 20% C. 30% D. 40% E. 50%20. If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is A. 200 cm B. 300 cm C. 150 cm D. 100 cm21. The minimum clear cover for R.C.C. columns shall be A. greater of 40 mm or diameter B. smaller of 40 mm or diameter C. greater of 25 mm or diameter D. smaller of 25 mm or diameter22. Top bars are extended to the projecting parts of the combined footing of two columns L distance apart for a distance of A. 0.1 L from the outer edge of column B. 0.1 L from the centre edge of column C. half the distance of projection D. one-fourth the distance of projection.23. The angle of internal friction of soil mass is the angle whose A. tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane B. sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane C. cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane D. none of these.24. If the loading on a prestressed rectangular beam, is uniformly distributed, the tendon to be provided should be . A. straight below centroidal axis B. parabolic with convexity downward C. parabolic with convexity upward D. straight above centroidal axis E. none of these.25. A pre-stressed concrete member A. is made of concrete B. is made of reinforced concrete C. is stressed after casting D. possesses internal stresses. Share to all