**On This Page**

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
- Triangular load + 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

- Distribute the load
- Resist the temperature stresses
- Resist the shrinkage stress
- All the above

Q24 | Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory

- (wx/wy) = (ly/lx)
- (wx/wy) = (ly/lx)²
- (wx/wy) = (ly/lx)4
- None of these

Q25 | The pitch of the main bars in a simply supported slab, should not exceed its effective depth by

- Three times
- Four times
- Five times
- Six times