SOM - SESSION 3 -4TH SEM

Section modulus is defined as the ratio of _______

• Moment of inertia and distance of outermost layer from neutral layer

• Moment of inertia and young's modulus

• young's modulus and distance of outermost layer from neutral layer

• None

Unit of section modulus is _______

• mm⁴

• mm²

• mm

• mm³

Section modulus for a rectangular section is ______

• bd³/6

• bd²/6

• bd/6

• None

Section modulus for a circular section is _________-

• $\frac{\pi d^3}{32}$

• $\frac{\pi d^{4\ }}{64}$

• $\frac{\pi d}{2}$

• None

Bending moment M = __________

• f X I

• f X Z

• f/I

• f/Z

Section modulus for Hollow circular section is _______-

• $\frac{\pi\left(D^{4\ \ }-\ d^4\right)}{32D}$

• $\frac{\pi\left(D^3\ -\ d^3\right)}{32D}$

• $\frac{\pi\left(D^{2\ }-\ d^2\right)}{64D}$

• None

Section modulus for a Hollow rectangular section is __________

• $\frac{\left(BD^{3\ }-\ bd^3\right)}{6D}$

• $\frac{\left(BD^2\ -bd^2\right)}{6D}$

• $\frac{\left(BD^3\ -\ bd^3\right)}{64D}$

• None

If B=3m, D= 9m, Calculate the section modulus of a rectangular section

• 45

• 4.5

• 40.5

• 50