Which of the following is a stated requirement for an applicant for a master or journeyman plumbing license?

• A. US citizen
• B. Minimum two years of plumbing experience
• C. Be of good moral character
• D. At least 21 years old

Answer: (C)

Licensing boards require that applicants demonstrate good moral character because plumbing licenses authorize work that directly affects public health and safety. This standard signals to the state that the person is honest, trustworthy, and responsible, which helps ensure the license holder will perform work ethically and reliably. In practice, good moral character is evaluated through disclosures, references, and sometimes background checks, making it a clear, explicit prerequisite for both master and journeyman licenses.

Citizenship status isn’t universally required for licensure, and age or a specific number of years of experience are separate criteria that may or may not be stated plainly depending on the jurisdiction. The key point that is consistently emphasized across licensing boards—hence the correct choice—is demonstrating good moral character.