# Design of RC Structures Questions and Answers – Reinforcement – Minimum Spacing

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

1. The compressive strength of concrete is about 10 to 15% of its tensile strength.
a) True
b) False
View Answer

Answer: b
Explanation: Compressive strength of concrete is more than its tensile strength as the concrete itself does not have any tensile strength.

2. Select the statically determinate structure from the following.
a) Fixed beam
b) Overhanging and simply supported beams
c) Continuous beams
d) Only simply supported beams
View Answer

Answer: b
Explanation: The static equilibrium equations are enough to determine all the internal forces in it so they are statically determinate structure.

3. What is the horizontal portion of step in staircase called?
a) Tread
b) Rise
c) Winder
d) Flight
View Answer

Answer: a
Explanation: Horizontal portion of step is called tread and vertical is called rise.
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4. When was the ultimate load method of designing evolved.
a) 1940
b) 1950
c) 1960
d) 1970
View Answer

Answer: b
Explanation: The ultimate load method of designing was evolved in 1950 and became an alternative to WSM. It is also referred as load factor method.

5. If load is very small in singly reinforced beam than _______
a) both concrete and steel will resist tension
b) both concrete and steel will resist compression
c) only concrete will resist compression
d) only steel will resist tension
View Answer

Answer: a
Explanation: Since the load is very small and concrete also has very low amount of tensile strength so both will resist tension.

6. What is the ratio of bond stress for high yield stress bars to plain bars?
a) 1.2
b) 1.4
c) 1.6
d) 1.8
View Answer

Answer: b
Explanation: According to Indian Standard’s code, the ratio of bond stress for high yield stress bars to plain bars is 1.4.

7. Select the correct specific weight for concrete from the following.
a) 25 kN/m3
b) 24 kN/m3
c) 20 kN/m3
d) 30 kN/m3
View Answer

Answer: a
Explanation: Specific weight for concrete is mass/unit volume. Since unit volume of concrete contain 25 kN weight therefore specific weight for concrete is 25 kN/m3
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8. The stress in concrete increases in direct proportion to increase in strain.
a) True
b) False
View Answer

Answer: b
Explanation: The stress in concrete is inversely proportional to strain.

9. What is the formula for modular ratio?
a) 280 / 3 σcbc
b) 280 / 2 σcbc
c) 3 σcbc / 280
d) 2 σcbc / 280
View Answer

Answer: a
Explanation: Where σcbc = permissible stress in compression due to bending in concrete in N/mm2.
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10. The reinforcement doesn’t………..from concrete surrounding it.
a) Settle
b) Slip
c) Shrink
d) Deform
View Answer

Answer: b
Explanation: This assumption is made to design the proper shape and plane for the RCC.

11. Residual stress is a result of………….
a) Plastic deformation
b) Elastic deformation
c) Stress- Strain
d) Bending Moment
View Answer

Answer: a
Explanation: Residual stresses occur in rolled sections as a result of plastic deformation during the cooling process after rolling.

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]

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