A. 10
B. 15
C. 20
D. 25
✅ The correct answer is option B.
RCC Structures Design MCQs
In a singly reinforced beam, the effective depth is measured from its compression edge to_________________?
A. Tensile edge
B. Tensile reinforcement
C. Neutral axis of the beam
D. Longitudinal central axis
✅ The correct answer is option B.
According to I.S. 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
A. 20 cm
B. 30 cm
C. 40 cm
D. 75 cm
✅ The correct answer is option B.
Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than________________?
A. One diameter of thinner bar
B. One diameter of thicker bar
C. Twice the diameter of thinner bar
D. None of these
✅ The correct answer is option B.
For M 150 grade concrete (1:2:4) the moment of resistance factor is_________________?
A. 0.87
B. 8.50
C. 7.50
D. 5.80
✅ The correct answer is option B.
The breadth of a ribbed slab containing two bars must be between______________?
A. 6 cm to 7.5 cm
B. 8 cm to 10 cm
C. 10 cm to 12 cm
D. 12 cm to 15 cm
✅ The correct answer is option B.
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________________?
A. (1 – C) mf – eE
B. (C – 1)mf + eE
C. (C – 1)mf – eE
D. (1 – C)mf + eE
✅ The correct answer is option B.
An R.C.C. roof slab is designed as a two way slab if________________?
A. It supports live loads in both directions
B. The ratio of spans in two directions is less than 2
C. The slab is continuous over two supports
D. The slab is discontinuous at edges
✅ The correct answer is option B.
The effective span of a simply supported slab, is_______________?
A. Distance between the centres of the bearings
B. Clear distance between the inner faces of the walls plus twice the thickness of the wall
C. Clear span plus effective depth of the slab
D. None of these
✅ The correct answer is option B.
The ratio of the breadth to effective depth of a beam is kept_______________?
A. 0.25
B. 0.50
C. 0.70
D. 0.75
✅ The correct answer is option B.