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Q: According to IS 800 : 2007, identify the property which is considered as a mechanical property of structural steel, important in design.
  • A. Unit mass
  • B. Maximum percent elongation
  • C. Co-efficient of thermal expansion
  • D. Poisson ratio
Correct Answer: Option B - (1) Mechanical properties– The principal mechanical properties of structural steel important in design, as detailed by the code IS 800 : 2007 : (i) Yield stress (fy) (ii) The tensile or ultimate stress (fu) (iii) Maximum percent elongation etc. (2) Physical properties– Physical properties of structural steel, as detailed by IS 800 : 2007 (a) Unit mass (b) Modulus of elasticity (c) Poisson ratio (d) Modulus of rigidity (e) Coefficient of thermal expansion.
B. (1) Mechanical properties– The principal mechanical properties of structural steel important in design, as detailed by the code IS 800 : 2007 : (i) Yield stress (fy) (ii) The tensile or ultimate stress (fu) (iii) Maximum percent elongation etc. (2) Physical properties– Physical properties of structural steel, as detailed by IS 800 : 2007 (a) Unit mass (b) Modulus of elasticity (c) Poisson ratio (d) Modulus of rigidity (e) Coefficient of thermal expansion.

Explanations:

(1) Mechanical properties– The principal mechanical properties of structural steel important in design, as detailed by the code IS 800 : 2007 : (i) Yield stress (fy) (ii) The tensile or ultimate stress (fu) (iii) Maximum percent elongation etc. (2) Physical properties– Physical properties of structural steel, as detailed by IS 800 : 2007 (a) Unit mass (b) Modulus of elasticity (c) Poisson ratio (d) Modulus of rigidity (e) Coefficient of thermal expansion.