GATE Exam Questions - Engineering

Q1:

The plastic modulus of a section is 4.8 x 10-4 m3. The shape factor is 1.2. The plastic moment capacity of the section is 120 kN.m. The yield stress of the material is

A 100 MPa

B 240 MPa

C 250 MPa

D 300 MPa

ANS:C - 250 MPa

Mp = 120 Kn-M.
Fy = ?

Zp = 4.8 * 10-4.
Fy = Mp / Zp.

Fy = 120/4.8 *10-4.
= 250 * 10-3.
or 250 Mpa.