Rcc structures design questions with answers
181 multiple-choice questions. Open any question for its answer and explanation.
- The maximum shear stress (q) in concrete of a reinforced cement concrete beam is
- If the length of an intermediate span of a continuous slab is 5 m, the length of the end span is kept
- If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge
- A foundation is called shallow if its depth, is
- If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
- A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
- An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
- A pre-stressed rectangular beam which carries two concentrated loads W at $$\frac{{\text{L}}}{3}$$ from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is
- According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is
- If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is
- In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
- On piles, the drop must be at least
- 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 singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is
- As per IS : 456, the reinforcement in a column should not be less than
- If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than
- The diameter of main bars in R.C.C. columns, shall not be less than
- Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
- Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than
- 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
- The radius of a bar bend to form a hook, should not be less than
- If T and R are tread and rise respectively of a stair, then
- An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
- A part of the slab may be considered as the flange of the T-beam if
- If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be