Question

question 7
why do welders need to apply tolerances when measuring and cutting materials?
a to allow for small acceptable differences in size
b to make sure the weld joint melts faster
c to avoid having to use conversion factors
d to prevent the use of metric tools

Explanation:

Tolerances account for minor variations in manufacturing and measurement processes. In welding, they allow for small, acceptable differences in the size of materials to ensure proper fit - up and assembly. Other options are not related to the purpose of tolerances.

Answer:

A. to allow for small acceptable differences in size