The plumbing state licensing exam is closed book, four hours, and has 80 multiple choice questions. The plumbing licensing exam covers the following topics: potable and nonpotable water systems; construction, removal, repair, and maintenance for buildings and premises; sanitary and non-sanitary waste and sewerage construction; removal, repair, and maintenance for buildings and premises.

In Louisiana you must also take a business and law exam, which is closed book and three hours. This exam covers the following topics: license law, federal and state tax laws, labor laws, estimating and bidding, contracts, project management, risk management, accounting, business organizations, Louisiana lien laws and contractor safety practices.