Design of RC Structures Questions and Answers – Reinforcement – Bending Bars

This set of Design of RC Structures Multiple Choice Questions & Answers (MCQs) focuses on “Reinforcement – Bending Bars”.

1. If the area exceeds the plan area of the building by ______ % than the raft foundation is provided.
a) 10
b) 20
c) 40
d) 50

Explanation: If the planned area of the building is 50 % less than the actual area then the raft foundation is provided to give a proper support to it.

2. What is the minimum thickness of construction hearth?
a) 100mm
b) 125mm
c) 150mm
d) 200mm

Explanation: According to Code IS 3872, the minimum thickness of construction hearth is 12.5 cm.

3. What is the minimum thickness of separating walls?
a) 100mm
b) 150mm
c) 190mm
d) 200mm

Explanation: According to Building Regulations, the minimum thickness of separating walls is 190mm.

4. How is moisture in buildings prevented at doors and window jambs?
a) Mastic pointing
b) Extra wall ties
c) Vertical d.p.c.s
d) Cavity walling

Explanation: Vertical d.p.c.s at doors and window jambs are prevented by vertical d.p.c.s. It does not allow moisture to form on it.

5. Why is Steel used as reinforced material in RCC?
a) Steel provides tensile strength to the structure
b) Steel provides compressive strength to the structure
c) Thermal coefficient of steel is less than that of concrete
d) Steel is not reactive to water

Explanation: As per the nature of steel and concrete, steel has tensile strength and concrete has compressive strength so they are joined together to form a perfect bond.

6. The ultimate load carrying capacity of bare steel is more than that of concrete-steel combination.
a) True
b) False

Explanation: Bushar and Shanuzan tested number of steel-concrete girder under shear and axial loading, and they found that concrete- steel combination has more loading capacity.

7. Concrete is a material which is weak in _______
a) Compression
b) Strength
c) Tension
d) Plasticity

Explanation: Concrete is a material which is weak in tension, that is why it is used in the combination with steel as it is strong in tension.

8. What is the basic size of coarse aggregate?
a) 10mm and 20mm
b) 5mm and 10mm
c) 20mm and 40mm
d) More than 40mm

Explanation: The aggregate whose particles are retained on IS Sieve No. 480 (4.75mm) is termed as coarse aggregate.

9. What modulus of concrete has same value within the limits of deformation of the member?
a) Plastic
b) Elastic
c) Shrinkage
d) Creep

Explanation: If this assumption won’t be made than it will be impossible to design the steel according to its permissible stress limit.

10. The concrete in the ________ zone should not be taken into account while determining the neutral axis.
a) Compression
b) Neutral Zone
c) Centroidal Zone
d) Tension Zone

Explanation: Basic assumption for RC beam is that tension is borne completely by steel so concrete in the tension zone should not be taken into account while determining the neutral axis.

Sanfoundry Global Education & Learning Series – Design of RC Structures

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