AP ECET CIVIL ENGINEERING Multiple Choice Questions (MCQs)

AP ECET Civil Engineering - Reinforced Concrete Structures: Unit 4

46. What is the characteristic strength of concrete?
    a) The strength at which concrete fails under a specific load.
    b) The strength at 28 days that 95% of the samples are expected to exceed.
    c) The strength of concrete at the time of casting.
    d) The strength of concrete after curing for 7 days.
    Answer: b) The strength at 28 days that 95% of the samples are expected to exceed.
47. The modulus of elasticity for concrete is typically determined from:
    a) Compressive strength of concrete.
    b) Tensile strength of concrete.
    c) Flexural strength of concrete.
    d) Poisson’s ratio of concrete.
    Answer: a) Compressive strength of concrete.
48. According to IS 456-2000, the partial safety factor for materials used in reinforced concrete is:
    a) 1.5
    b) 1.25
    c) 1.15
    d) 1.2
    Answer: b) 1.25
49. Which of the following is not a part of the philosophy of Limit State Design (LSD)?
    a) Strength Limit State
    b) Serviceability Limit State
    c) Durability Limit State
    d) Safety Limit State
    Answer: d) Safety Limit State
50. For the design of reinforced concrete beams, the design strength of materials is based on:
    a) The factored loads.
    b) The unfactored loads.
    c) The partial safety factor for materials.
    d) The ultimate loads.
    Answer: a) The factored loads.
51. In the analysis and design of singly reinforced rectangular beams, which of the following assumptions is made?
    a) The concrete behaves elastically under all loads.
    b) The reinforcement is fully bonded to the concrete.
    c) The concrete is infinitely strong in tension.
    d) The tension reinforcement is located in the top part of the beam.
    Answer: b) The reinforcement is fully bonded to the concrete.
52. A doubly reinforced beam is used when:
    a) The span is very long.
    b) The bending moment is high, and there is not enough concrete in the compression zone.
    c) The beam experiences torsion.
    d) The shear in the beam is excessive.
    Answer: b) The bending moment is high, and there is not enough concrete in the compression zone.
53. The primary purpose of using T-beams in reinforced concrete design is to:
    a) Increase the bending strength.
    b) Provide better shear resistance.
    c) Use the slab as the flange and the beam as the web.
    d) Reduce the weight of the beam.
    Answer: c) Use the slab as the flange and the beam as the web.
54. What is the development length in reinforced concrete design?
    a) The length of the bar required to transfer stresses effectively between the concrete and steel.
    b) The length of the beam from the center of support to the point of failure.
    c) The length over which the concrete is poured.
    d) The total length of a reinforcement bar.
    Answer: a) The length of the bar required to transfer stresses effectively between the concrete and steel.
55. Which of the following types of slabs are considered in the analysis and design as per IS 456-2000?
    a) One-way slabs.
    b) Two-way slabs.
    c) Slabs subjected to torsion.
    d) All of the above.
    Answer: d) All of the above.
56. For a two-way slab, if the ratio of length to breadth is less than 2, the slab is considered:
    a) A one-way slab.
    b) A doubly reinforced slab.
    c) A two-way slab.
    d) A cantilever slab.
    Answer: a) A one-way slab.
57. In the design of RCC beams for torsion, the primary reinforcement is provided for:
    a) Shear stress only.
    b) Bending stress only.
    c) Both shear and bending stresses.
    d) Torsional shear stress.
    Answer: d) Torsional shear stress.
58. Which method is used for checking the deflection of reinforced concrete beams and slabs in design?
    a) Moment-curvature method.
    b) Compatibility method.
    c) Elastic theory method.
    d) Limit state method.
    Answer: d) Limit state method.
59. In the design of continuous slabs and beams, the main criterion for reinforcement is:
    a) Bending moment.
    b) Shear force.
    c) Torsional resistance.
    d) All of the above.
    Answer: a) Bending moment.
60. The detailing of reinforcement in a singly reinforced beam requires:
    a) Placing bars only in tension zone.
    b) Providing a higher quantity of steel in compression.
    c) Providing the same amount of steel in tension and compression.
    d) Reinforcing the compression zone only.
    Answer: a) Placing bars only in tension zone.

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