\begin{tabular}{|l|l|}
\hline Q.23 & $\begin{array}{l}\text { Two surfaces } P \text { and } Q \text { are to be joined together. In which of the given joining } \\
\text { operation(s), there is no melting of the two surfaces } P \text { and } Q \text { for creating the joint? }\end{array}$ \\
\hline & \\
\hline
- & Arc welding \\
\hline - & Brazing \\
\hline - & Adhesive bonding \\
\hline - & Spot welding \\
\hline
\end{tabular}