SOM -SESSION 5-4TH SEM

A __________ is the important machine element which rotate in order to transmit power or motion.

• Beam

• Shaft

• Column

• Struts

A ___________is a moment that twists a member about its longitudinal axis.

• Bending

• Compressive force

• Torque

• None.

A __________creates distortion. Shear stress on the shaft leads to its eventual rupture

• Torsion

• Bending

• Both

• None

The angle at which the shaft is rotated is known ____________

• Polar moment of inertia

• Polar modulus

• Angle of twist

• None

Unit of angle of twist is ___________

• mm

• N

• Kg

• Radian

Unit of Torsional moment is _________-

• N mm

• N/mm

• Kg

• Radian

Polar moment of inertia for a circular section is _________-

• $\frac{\pi d^4}{32}$

• $\pi d$

• $\frac{\pi d^2}{32}$

• $\frac{\pi d^4}{64}$

Polar modulus of a circular section is _________

• $\pi d$

• $\frac{\pi d^3}{16}$

• $\frac{\pi d^2}{32}$

• None

Polar modulus Zp =____________

• Ip/R

• Ip X R

• Ip - R

• None

Polar modulus of hollow circular section is __________

• $\frac{\pi\left(D^4\ -\ d^4\right)}{16}$

• $\frac{\pi\left(D^4\ -\ d^4\right)}{16D}$

• $\frac{\pi D^4}{16}$

• None