Explore topic-wise MCQs in Mechanical Metallurgy Questions and Answers.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

What does σij represent in a 3×3 stress matrix?

A. Stress is applied on i face of the material in the +ve j direction
B. Stress is applied on i face of the material in the -ve j direction
C. Stress is applied on j face of the material in the +ve i direction
D. Stress is applied on j face of the material in the -ve i direction
Answer» C. Stress is applied on j face of the material in the +ve i direction
Discussion
2.

Calculate the dilation of body, given that the initial volume is 250 mm2 and final volume is 235.5 mm2.

A. 0.058
B. 0.061
C. 0.050
D. 0.060
Answer» B. 0.061
Discussion
3.

Calculate the hydrostatic strain, if εx, εy, εz are 0.01, 0.2, 0.05 respectively?

A. 0.2
B. 0.866
C. 0.125
D. 1
Answer» C. 0.125
Discussion
4.

The part of strain tensor which involves in the shape change rather than the volume change is called strain deviator ε’ij.

A. True
B. False
Answer» B. False
Discussion
5.

Dilation on parallelepiped with strains in x, y, z direction equals to εx, εy, εz respectively:

A. The total volume change is given as Δ = εx + εy + εz for the small strain. The mean stress or hydrostatic (spherical) component of stress will be equal to ____
B. Δ
C. Δ/2
D. Δ/3
E. Δ/4
Answer» D. Δ/3
Discussion
6.

For the following stress matrix, the first invariant of the stress tensor is the trace of a matrix, the sum of diagonal element: I1 = σ11 + σ22 + σ33. The second invariant of matrix is equal to _________

A. \(\begin{vmatrix}\sigma_{11} & \sigma_{12} & \sigma_{13}\\ \sigma_{21}& \sigma_{22} & \sigma_{23}\\ \sigma_{31}& \sigma_{32} & \sigma_{33}\end{vmatrix}\)
B. Sum of all the elements of the matrix
C. Sum of first column elements
D. Sum of first raw elements
E. Sum of all the principal minors of the matrix
Answer» E. Sum of all the principal minors of the matrix
Discussion