Which statement is true regarding the alignment of rail during welding?

The statement that alignment must match specified tolerances is crucial in the context of thermite welding, especially in rail applications. Proper alignment ensures that the rails are joined correctly, maintaining the structural integrity and smoothness of the rail line. When rails are misaligned, it can lead to operational issues such as track buckling or train derailments, as well as increased wear and tear on the train wheels and track.

Adhering to specified tolerances during alignment guarantees that the welded joint will perform optimally under the stresses and strains experienced in rail systems. This consideration is vital for safety and efficiency in railway operations, and deviations from these tolerances can significantly compromise the effectiveness of the weld and overall system performance.

This principle underscores the importance of meticulous preparation and execution in thermite welding, where alignment is a key factor in ensuring successful, durable joints.