What action is required if the ends of a linear measure are made of a softer material than brass?

When the ends of a linear measure are made of a softer material than brass, it is essential to protect them by covering or reinforcing them with brass or a similarly hard material. This precaution is necessary to prevent wear and damage that could occur from regular use. Softer materials may wear down more quickly when subjected to pressure and friction, which can compromise the accuracy and integrity of the measurement tool over time. By using a harder protective layer, the measurement equipment is safeguarded against potential degradation, ensuring consistent performance and prolonging its lifespan.

Choosing not to protect the ends, as in the first option, would leave them vulnerable to damage. Painting them, as suggested in the second option, may not provide sufficient protection against wear from use. Replacing the ends entirely, while a possible solution, could be more costly and may not be necessary if proper protective measures, such as using a harder material, can effectively extend the life of the tool. Therefore, the best action is to ensure that the ends are adequately protected with brass or a similarly durable material.