Which of the following statements regarding a journeyman plumber's exam is correct?

A journeyman plumber's exam is designed to assess the comprehensive knowledge and skills required to work independently in the plumbing field. In this context, requiring re-examination of all parts after failing ensures that candidates have a complete understanding of the essential principles and practices of plumbing before they are licensed to work unsupervised. This approach helps maintain high standards of safety, compliance, and professionalism within the plumbing trade.

Requiring a candidate to retest on material they may not have mastered in their initial attempt reinforces the importance of grasping all aspects of plumbing, from code regulations to practical applications. Consequently, this requirement protects both public safety and the integrity of the plumbing profession.

In contrast, allowing retakes at any time or permitting exemptions could undermine the examination's effectiveness and accountability. Similarly, not requiring an apprentice license overlooks the foundational training that apprenticeship provides, which is essential for a journeyman to perform competently in the field.