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Q: Why are steel reinforcing rods used in concrete beams–
  • A. To make it carry compression
  • B. To make it carry tension
  • C. To make it carry compression as well as tension
  • D. None of these
Correct Answer: Option B - Concrete is very good in compression but very weak in the tension. So for any structure it is equally important to withstand tension & compression both. Steel is strong in tension, ie. it can bear tension very easily so by using steal bars, RCC structure can easily withstand tension load or tensile stresses also.
B. Concrete is very good in compression but very weak in the tension. So for any structure it is equally important to withstand tension & compression both. Steel is strong in tension, ie. it can bear tension very easily so by using steal bars, RCC structure can easily withstand tension load or tensile stresses also.

Explanations:

Concrete is very good in compression but very weak in the tension. So for any structure it is equally important to withstand tension & compression both. Steel is strong in tension, ie. it can bear tension very easily so by using steal bars, RCC structure can easily withstand tension load or tensile stresses also.