Of the following, the strongest type of joint is the ______.

The strongest type of joint among the options given is the brazed lap joint. This type of joint benefits from the brazing process, which uses a filler metal with a melting point above 450 °C (842 °F) to bond materials together. During brazing, the filler metal flows into the joint gap by capillary action, allowing for a complete and secure bond between the overlapping surfaces of the materials.

Lap joints have a larger surface area for the joint compared to butt joints, which contributes to their overall strength. The combination of the strength of the lap joint configuration and the brazing process creates a joint that can withstand greater loads and stresses, making it more resilient in applications where durability is critical, such as in pipeline installations.

In contrast, the other types of joints listed, whether soldered or brazed in butt or lap configurations, generally do not provide the same level of strength or resilience, particularly under high-stress conditions. This highlights the effectiveness of brazed lap joints in achieving a strong and reliable connection.