
\begin{tabular}{|l|l|}
\hline Q.26 & $\begin{array}{l}\text { The principal stresses at a point } \mathrm{P} \text { in a solid are } 70 \mathrm{MPa},-70 \mathrm{MPa} \text { and } 0 . \text { The } \\
\text { yield stress of the material is } 100 \mathrm{MPa} \text {. Which prediction(s) about material failure } \\
\text { at } \mathrm{P} \text { is/are CORRECT? }\end{array}$ \\
\hline
- & Maximum normal stress theory predicts that the material fails \\
\hline - & Maximum shear stress theory predicts that the material fails \\
\hline - & Maximum normal stress theory predicts that the material does not fail \\
\hline - & Maximum shear stress theory predicts that the material does not fail \\
\hline
\end{tabular}