Tennessee CMC A Plumbing Practice Exam

Here’s the thing—every would-be contractor, not just plumbers, has to pass the Tennessee Business and Law exam. It’s 50 questions long. Sounds basic, but skip it and your plumbing license application goes nowhere. Even if you know pipe bends like the lines on your own palm, you can’t sidestep this test.

More details? You can find current info and application links at the Department of Commerce & Insurance’s homepage.

Let’s break it down step by step:

1. Meet the Tennessee Plumbing License Requirements

   • Be at least 18
   • Hold four years of hands-on experience (documented)
   • Pass both the CMC A exam and the Business and Law exam
   • Submit paperwork, pay fees, and provide proof of insurance/bonding

2. Study the Right Tennessee Plumbing Exam Questions
   The real exam has 110 questions (you get 295 minutes), covering plumbing math, code knowledge, jobsite safety, and project planning—the kitchen sink, basically.

   You’ll want dialed-in prep. Static PDFs help, but you know what really moves the needle? Interactive, online practice exams that feel just like the real deal. Our exams mirrors the PSI exam so you’re practiced, not panicked.

3. Take the Test—And Know What to Bring

   • Register for the official PSI exam here.
   • Bring codebooks (highlighted or tabbed, but skip sticky notes—see PSI bulletin).
   • No scratch paper, outside notes, or “borrowed” reference materials allowed.

When studying, interactive online practice exams give you a significant advantage over static PDFs. Here’s why:

• They simulate the actual testing environment
• They provide immediate feedback on wrong answers
• They track your progress and identify weak areas
• They adapt to your learning style with randomized questions
• They build the mental stamina needed for a nearly 5-hour exam

Static PDFs just don’t replicate the pressure, timing, and adaptability of the real exam experience. They’re like practicing basketball by reading about it instead of getting on the court!

The CMC A exam isn’t something you can just wing. With 110 questions and a 295-minute time limit, it’s a comprehensive assessment of your plumbing knowledge. Here’s what you’re up against:

• Open book format – You can bring approved reference materials
• Time management challenge – Less than 3 minutes per question on average
• Wide-ranging content – Covers everything from math to code compliance to safety

The exam covers these major areas:

• General Knowledge and Math
• General Requirements (administrative, structural, backflow, materials, joints, testing)
• Water Supply and Distribution
• Fixtures and Water Heaters
• Drain, Waste, and Vent Systems
• Traps, Cleanouts, and Interceptors
• Isometric Analysis
• Gas Appliances and Piping
• OSHA Safety

You’ll need these specific code books for the exam:

• International Plumbing Code, 2012
• International Fuel Gas Code 2012
• Mathematics for Plumbers and Pipefitters, 8th Edition
• Code of Federal Regulations – 29 CFR Part 1926 (OSHA)

Already licensed in another state? Tennessee does offer reciprocity with some states, but the process isn’t automatic. You’ll need to:

1. Submit documentation of your current license
2. Verify it’s in good standing
3. Demonstrate it has similar requirements to Tennessee’s
4. Still take the Tennessee Business and Law exam (this requirement rarely gets waived)

The states with the most straightforward reciprocity paths include Alabama, Kentucky, North Carolina, and Georgia, but agreements can change. Always check with the Tennessee Board of Licensing Contractors for the most current information.

Here’s some motivation to get you through the studying—licensed plumbers in Tennessee earn significantly more than their unlicensed counterparts. As of 2025:

• Entry-level licensed plumbers typically start around $55,000-$65,000 annually
• Mid-career CMC A license holders average $75,000-$90,000
• Experienced licensed plumbers who run their own businesses often clear $100,000+

These figures vary by region (Nashville and Memphis typically pay higher than rural areas) and specialization (commercial plumbers often earn more than residential).

Compare this to unlicensed plumbers who typically max out around $45,000-$50,000, and the financial incentive becomes crystal clear.

So, if you’re serious about a plumbing career in Tennessee, the CMC A license is where it’s at. It opens doors statewide, grants you the authority to handle big jobs, and sets you apart in a competitive market. Just remember: start prepping with the right tools, pass those two exams, and lean on online practice exams to smooth the path.

Now, ready to roll up your sleeves and get licensed? The Tennessee Department of Commerce and Insurance and the PSI test portal have you covered, so there’s really no excuse to stall!

Check out these handy links to get started:

• Tennessee Department of Commerce and Insurance – Contractors Board
• PSI Candidate Portal for Registration
• Tennessee CMC A Exam Bulletin PDF

Good luck—you’re on your way to plumbing stardom in the Volunteer State!

Plus, it’s designed to build your confidence. Instead of stressing over hypothetical legal jargon, you’ll get comfortable with applying the rules. Are you ready to see what happens if you miss a lien deadline or bid over your license limit? That kind of insight doesn’t just help you pass; it protects your business.

Is the TN Contractors exam open-book?
Yes, you can use reference materials including the NASCLA Contractors Guide Tennessee.

Do I need to take the Tennessee Business and Law Exam?
Yes, it’s required for nearly all contractor licenses in Tennessee.

How much work can you do without a contractor license in Tennessee?
Limited minor work is allowed, but anything larger requires licensing to avoid penalties.