# Design of RC Structures Questions and Answers – Singly Reinforced Beams

This set of Design of RC Structures Multiple Choice Questions & Answers (MCQs) focuses on “Singly Reinforced Beams”.

1. Plane sections transverse to the centre line of a member before bending remains plane after bending.
a) True
b) False

Explanation: For designing a singly reinforced beam, an assumption is made which states that, plane sections transverse to the centre line of a member before bending remains plane after bending.

2. 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.

3. The reinforcement doesn’t _______ from concrete surrounding it.
a) Settle
b) Slip
c) Shrink
d) Deform

This assumption is made to design the proper shape and plane for the RCC.

4. In the following figure all the planes are perpendicular to the centre line. When the force is applied to the beam, sagging will occur. What will happen to the planes?

a) They will remain at same place
b) They will shift upwards
c) They will change the position in the direction of the beam

Explanation: When the force is applied to the beam it crooks, then the different fibers are will be deformed which results in these planes respectively occupy the new position.

5. Strain in the concrete just surrounding the steel= et. What will be the stress in steel?
a) et
b) m.et
c) m.Es.et
d) m.Ee.et

Explanation: Since there is no slip between steel and concrete surrounding it, the strain in steel is equal to et

• Stress in steel = Es.et = m.Ee.et

6. The stresses in the orking loads can be kept within the _______ stress are not found to be realistic.
a) Permissible
b) Normal
c) Bending
d) Shear

Explanation: The main assumption for linear elastic behavior is that the stresses under working loads can be kept within the permissible stresses are not found to be realistic.

7. What is the ratio of the strength of material to the permissible stress is called?
a) Factor of Safety
b) Shear factor
c) Creep factor
d) Strength Modulus

Explanation: The ratio of strength of material to the permissible stress is often referred to as the factor of safety and this provides for possible overloads.

8. What is the term used when too much water is added to the concrete than it is used.
a) Honey-Comb
b) Laitance
c) Pumpability Failure
d) Fluid defect

Explanation: Too much water will make the mixture of the flowy part of the cement and water to the surface resulting in the formation of the scum or a thin layer of material known as laitance.

9. WSM fails to discriminate between different types of loads acting simultaneously.
a) True
b) False

Explanation: WSM fails to discriminate between different types of loads acting simultaneously, but have different degrees of uncertainity.

Sanfoundry Global Education & Learning Series – Design of RC Structures

To practice all areas of Design of RC Structures, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]