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Key Facts: MS Plumber Exam
70%
Passing Score
MS Board of Contractors
~80
Exam Questions
PSI exam format
Trade+Biz
Exam Components
Two-part exam
IPC
Code Base
Mississippi adoption
The Mississippi journeyman plumber exam is administered through PSI and overseen by the State Board of Contractors. The exam includes both trade knowledge and business exam components, which is unique among plumber exams. Mississippi uses the International Plumbing Code (IPC). Exam fees range from $50 to $400 depending on the license classification. Requires 70% to pass.
Sample MS Plumber Practice Questions
Try these sample questions to review concepts for the MS Plumber exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 298+ question experience with AI tutoring.
1Per the IPC as adopted by Mississippi, what is the minimum slope for a 4-inch horizontal drain pipe?
2Per the IPC, what is the DFU value for a floor-mounted water closet (1.6 GPF)?
3What is the minimum building drain size for a system with 200 DFUs per the IPC as adopted by Mississippi?
4Per the IPC, cleanouts in horizontal drains must be installed at intervals not exceeding what distance?
5Per the IPC, what is the minimum slope for a 2-inch horizontal drain pipe?
6Per the IPC as adopted by Mississippi, a lavatory has what DFU value?
7What is the minimum trap size for a kitchen sink per the IPC?
8Per the IPC, what fitting is required for a horizontal-to-horizontal direction change in drainage piping?
9Per the IPC, indirect waste from a commercial dishwasher must discharge through what?
10Per the IPC, what is the maximum DFU load on a 3-inch horizontal branch at 1/4 inch per foot slope?
About the MS Plumber Exam
Mississippi journeyman plumber licensing exam administered by PSI and overseen by the State Board of Contractors. Includes both trade and business exam components based on the International Plumbing Code (IPC). Covers drainage systems, water supply, venting, fixtures, gas piping, materials, and business/code administration. Requires 70% to pass.
Exam sponsor: Mississippi State Board of Contractors. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
80 questions
Time Limit
3 hours
Passing Score
70%
Reported exam pass rate: ~55-65%. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Official sources
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Drainage Systems
Drain pipe sizing, DFU calculations, slope requirements, cleanouts, building sewers, indirect waste, and special drainage systems per IPC
Water Supply Systems
Water pipe sizing, WSFU calculations, backflow prevention, pressure regulation, water heaters, cross-connection control, and potable water protection
Venting Systems
Vent sizing, wet venting, circuit venting, air admittance valves, vent termination, combination waste and vent, and trap seal protection
Fixtures & Appliances
Fixture installation requirements, clearances, accessible fixtures, commercial fixtures, water closets, lavatories, showers, and bathtubs
Gas Piping
Gas pipe sizing, BTU calculations, appliance venting, pressure testing, combustion air, and fuel gas code compliance
Business & Code Administration
Business practices, permits, inspections, plan review, approved materials, contractor regulations, and Mississippi-specific requirements
Preparing for the MS Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 80 questions
- Time limit: 3 hours
- Exam / certification fees: $50-$400 Official sources
Using Our Practice Resources
- Work through all 298 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
MS Plumber: Suggested Study Strategy
Frequently Asked Questions
How hard is the Mississippi journeyman plumber exam?
The Mississippi journeyman plumber exam is moderately challenging with an estimated 55-65% pass rate. The exam is based on the IPC and requires 70% to pass. Mississippi is unique in requiring both trade and business exam components, so candidates must prepare for business-related questions in addition to technical plumbing knowledge.
What is the business exam component?
Mississippi requires a business exam in addition to the trade knowledge exam. The business portion covers contractor regulations, business practices, estimating, project management, and Mississippi-specific contractor licensing requirements. Both components must be passed to obtain the license.
What plumbing code does Mississippi use?
Mississippi uses the International Plumbing Code (IPC) for its journeyman plumber exam. A clean, bound copy of the IPC is typically allowed as a reference during the PSI-administered exam. Check with the State Board of Contractors for the current adopted edition.
Why do Mississippi plumber exam fees vary so much?
Mississippi exam fees range from $50 to $400 depending on the license classification and scope of work. Higher classifications that allow larger project values have higher fees. Check with the State Board of Contractors for the specific fee for your desired license classification.