### Rcc Structures Design Set 2

This set of RCC Structures Design Multiple Choice Questions & Answers (MCQs) focuses on Rcc Structures Design Set 2

Q1 | The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of
• 10 mm
• 15 mm
• 20 mm
• 25 mm
Q2 | Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of
• 0.1 L from the outer edge of column
• 0.1 L from the centre edge of column
• Half the distance of projection
• One-fourth the distance of projection
Q3 | For M 150 grade concrete (1:2:4) the moment of resistance factor is
• 0.87
• 8.5
• 7.5
• 5.8
Q4 | is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is. The minimum stress on the beam subjected to a maximum bending moment is
• f = (P/A) -(Z/M)
• f = (A/P) -(M/Z)
• f = (P/A) - (M/Z)
• f = (P/A) - (M/6Z)
Q5 | 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:
• (1 - C)mf - eE
• (C - 1)mf + eE
• (C - 1)mf - eE
• (1 - C)mf + eE
Q6 | In a pre-stressed member it is advisable to use
• Low strength concrete only
• High strength concrete only
• Low strength concrete but high tensile steel
• High strength concrete and high tensile steel
Q7 | An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
• Triangular load of the wall
• UDL of wall
• UDL of wall + load from the roof
Q8 | The minimum clear cover for R.C.C. columns shall be
• Greater of 40 mm or diameter
• Smaller of 40 mm or diameter
• Greater of 25 mm or diameter
• Smaller of 25 mm or diameter
Q9 | The minimum thickness of a flat slab is taken
• L/32 for end panels without drops
• L/36 for end panels without drops
• L/36 for interior panels without drop
• All the above
Q10 | The design of heel slab of a retaining wall is based on the maximum bending moment due to:
• Its own weight
• Weight of the soil above it
• Load of the surcharge, if any
• All the above
Q11 | An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is
• Safe in shear
• Is safe with stirrups
• Is safe with stirrups and inclinedmembers
• Needsrevision ofthe section
Q12 | The neutral axis of a T-beam exists
• Within the flange
• At the bottom edge of the slab
• Below the slab
• All the above
Q13 | A pre-cast pile generally used, is
• Circular
• Square
• Octagonal
• Square with corners chamfered
Q14 | The spacing of transverse reinforcement of column is decided by the following consideration.
• The least lateral dimension of the column
• Sixteen timesthe diameter of the smallest longitudinal reinforcing rods in the column
• Forty-eight times the diameter of transverse reinforcement
• All the above
Q15 | The self-weight of the footing, is
• Not considered for calculating the upward pressure onfooting
• Also considered for calculating the upward pressure onfooting
• Not considered for calculating the area of the footing
• Both (b) and(c)
Q16 | Pick up the incorrect statement from the following:
• In the stem of a retaining wall, reinforcement is provided near the earth side
• In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab
• In the heel slab of a retaining wall, reinforcement is provided at the top of the slab
• None of these
Q17 | If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is
• D = 0.0775 a
• D = 0.775 a
• D = 0.775 a
• D = 0.775 a2
Q18 | After pre-stressing process is completed, a loss of stress is due to
• Shrinkage of concrete
• Elastic shortening of concrete
• Creep of concrete
• All the above
Q19 | In a simply supported slab, alternate bars are curtailed at
• 1/4th of thespan
• 1/5th of thespan
• 1/6th of thespan
• 1/7th of thespan
Q20 | If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width
• R + T
• T - R
• 2 +T2)
• R - T
Q21 | If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is
• [( - )/2] h
• [( + )/4] h
• [( + )/2] h
• ( - h
Q22 | In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2 , nominal reinforcement is provided at a pitch of
• One-half lever arm of the section
• One-third lever arm of the section
• Lever arm of the section
• One and half lever arm of the section
Q23 | The transverse reinforcements provided at right angles to the main reinforcement