MCQ on Design of R.C.C. Structure

Multiple Choice Questions on Design of R.C.C. Structure

As per IS 456: 2000 the minimum grade of concrete for reinforced concrete in mild exposure shall be
(a) M25
(b) M20
(c) M30
(d) M15

The working stress method is based on
(a) Plastic theory
(b) Elastic theory
(c) Ultimate load theory
(d) Elasto-Plastic theory

The partial safety factor for steel in limit state of collapse is
(a) 1.15
(b) 1.50
(c) 1.20
(d) 1.00

The limiting value of depth of neutral axis for RCC beam reinforced with Fe250 grade steel is
(a) 0.45 d
(b) 0.46 d
(c) 0.48 d
(d) 0.53 d
Where d is the effective depth of the beam.

At or near the supports; the concrete of simply supported beams may split at 45 degree angle with horizontal due to
(a) torsion
(b) diagonal tension
(c) bending moment
(d) All of the above

As per IS 456 : 2000 under normal conditions, crack width at the surface of concrete element should not exceed
(a) 0.1 mm
(b) 0.3 mm
(c) 0.2 mm
(d) None of the above

For designing singly reinforced simply supported concrete beam of span upto 10 m basic value of the span to effective depth ratio should not greater than
(a) 7
(b) 15
(c) 20
(d) 26

The maximum area of tension reinforcement for singly reinforced beam shall not exceed
(a) 4% of bD
(b) 6% of bD
(c) 0.12% of bD
(d) 0.04% of bD
Where b and D are width and overall depth of the beam respectively.

The beam in which the steel reinforcement is placed in the tension as well as compression zone is called as
(a) singly reinforced beam
(b) continuous beam
(c) cantilever beam
(d) doubly reinforced beam

The horizontal distance between parallel main reinforcement bars of slab shall not be more than
(a) 3d or 300 mm
(b) 7d
(c) 400 mm
(d) 5 d
Where d is the effective depth of slab.

If the ratio longer span/shorter span is less than 2, then slab is
(a) two-way slab
(b) one-way slab
(c) cantilever slab
(d) flat slab

Maximum diameter of the reinforcing bars in slab may be euqal to
(a) total thickness of slab/4
(b) total thickness of slab/8
(c) total thickness of slab/16
(d) total thickness of slab/20