# Civil Engineering - GATE Exam Questions - Discussion

### Discussion :: GATE Exam Questions - Section 3 (Q.No.9)

9.

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

Explanation:

No answer description available for this question.

 Deepak Prajapati said: (Feb 6, 2015) 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.

 Monu Verma said: (Feb 6, 2015) What about shape factor?

 Mayuri said: (Dec 9, 2015) Shape factor is the ratio of bending strength (Mp) of a rectangular member by its yield strength (My). Shape factor f = Mp/My and as Mp = FyZp and My = FyZe. So F = Zp/Ze.

 Snjy said: (Feb 10, 2017) Nice explanation. Thank you all.

 Roy said: (Nov 26, 2017) My=FyZy. Now,My=(plastic moment/S.F)=100/1.2=100...and Zy=(plastic section modulus/S.F)=(4.8*10^-4/1.2)=4*10^-4. So now Fy=250Mpa.