Which worker category is not allowed to construct, install, or alter plumbing unless supervised?

Which worker category is not allowed to construct, install, or alter plumbing unless supervised?

• A. Journeyman
• B. Apprentice
• C. Master plumber
• D. Helper

Answer: (A)

Apprenticeship is the stage where supervision is required for hands-on plumbing work. An apprentice is learning the trade and must work under direct supervision, so they generally cannot construct, install, or alter plumbing on their own. Journeymen have earned licensure to perform plumbing work independently, and masters supervise others and oversee projects. Helpers assist under supervision but are not typically performing the full installation tasks unsupervised. Therefore, the category that cannot perform those tasks unless supervised is the apprentice.

Apprenticeship is the stage where supervision is required for hands-on plumbing work. An apprentice is learning the trade and must work under direct supervision, so they generally cannot construct, install, or alter plumbing on their own. Journeymen have earned licensure to perform plumbing work independently, and masters supervise others and oversee projects. Helpers assist under supervision but are not typically performing the full installation tasks unsupervised. Therefore, the category that cannot perform those tasks unless supervised is the apprentice.