RCC Structures Design If ‘A’ is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force ‘P’ through its centroidal longitudinal axis, the compressive stress in concrete, is A/P P/2A P/A 2A/P A/P P/2A P/A 2A/P ANSWER DOWNLOAD EXAMIANS APP
RCC Structures Design The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm² and 250 kg/cm² respectively. If m = 15, the depth of its neutral axis is 20 cm 35 cm 30 cm 25 cm 20 cm 35 cm 30 cm 25 cm ANSWER DOWNLOAD EXAMIANS APP
RCC Structures Design 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 16 cm² 17 cm² 15 cm² 14 cm² 16 cm² 17 cm² 15 cm² 14 cm² ANSWER DOWNLOAD EXAMIANS APP
RCC Structures Design Pick up the assumption for the design of a pre-stressed concrete member from the following: A transverse plane section remains a plane after bending All listed here Variation of stress in reinforcement due to changes in external loading is negligible During deformation limits, Hook's law is equally applicable to concrete as well as to steel A transverse plane section remains a plane after bending All listed here Variation of stress in reinforcement due to changes in external loading is negligible During deformation limits, Hook's law is equally applicable to concrete as well as to steel ANSWER DOWNLOAD EXAMIANS APP
RCC Structures Design Based on punching shear consideration, the overall depth of a combined footing under a column A, is (Area of the column A × Safe punching stress)/Load on column A (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column) (Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column) None of these (Area of the column A × Safe punching stress)/Load on column A (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column) (Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column) None of these ANSWER DOWNLOAD EXAMIANS APP
RCC Structures Design If C is creep coefficient, f is original pre-stress 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: (C - 1) mf + eE (1 - C) mf + eE (1 - C) mf - eE (C - 1) mf - eE (C - 1) mf + eE (1 - C) mf + eE (1 - C) mf - eE (C - 1) mf - eE ANSWER DOWNLOAD EXAMIANS APP
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