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TEXAS MASTER PLUMBING EXAM QUESTIONS
WITH 100% CORRECT VERIFIED ANSWERS
(ACTUAL 202 5 )
INTRODUCTION:
This document contains the official set of Texas Master Plumbing Exam questions with 100% verified correct answers for the 2025 exam. It covers all essential topics, including licensing rules, renewal requirements, plumbing codes, gas piping, drainage systems, venting, water heaters, safety standards, and accessibility regulations. Designed as a complete study resource, it ensures thorough preparation for both technical and legal aspects of the exam.
EXAM QUESTIONS AND ANSWERS:
A person may not engage in plumbing (for the general public) in TX unless the person is --- correct answer --- Is an RMP Works under the supervision of an RMP A person may not install Med Gas piping unless the person --- correct answer --- Is a TX licensed Journeyman Master Plumber
A person may not install a Multipurpose Residential Fire Protection Sprinkler System, with no backflow preventer, unless the person is --- correct answer --- Is a TX licensed Journeyman or Master Plumber Holds the MRFPSS endorsement TSBPE licenses must be renewed --- correct answer --- Annually TSBPE endorsements must be renewed --- correct answer --- Every 3 Years A license of endorsement which has been expired for the 90 days or less may be renewed by paying fee that is equal to --- correct answer --- 1 - 1/2 times the normal renewal fee A license or endorsement with has been expired for more than 90 days but less than two years may be renewed by paying a renewal fee equal to --- correct answer --- 2 times the normal renewal fee A license or endorsement that has been expired more than Two years may be renewed by paying a renewal fee that is equal to --- correct answer --- THE LICENSE CANNOT BE RENEWED
A Tradesman Plumber= Limited Licence holder may legally supervise apprentices performing on a residential job --- correct answer --- True In Order to register as a Drain Cleaner, an apprentice must have at least --- correct answer --- 4000 hours of experience In order to Register as a Drain Cleaner Registant, an apprentice must have atleast --- correct answer --- No experience necessary in order to take the Tradesman Plumber- Limited Licensed exam an apprentice must have at least --- correct answer --- 4000 Hours of experience in order to take the Journeyman Plumber exam, an apprentice must have at least --- correct answer --- 8000 hours of Experience All Service Vehicles used for plumbing must be identified with --- correct answer --- RMP license number company name All pipe, fittings, and fixtures must be --- correct answer --- Listed and approved
Burred ends of pipe and tubing must be --- correct answer --- Reamed to full bore Piping passing under or through walls shall be --- correct answer --
- Protected from breakage Piping and fittings approved for buildings sewers only may be installed inside and outside of the building --- correct answer --- False What size vertical steel pipe must be supported at every floor level? --- correct answer --- 1 - !/4 or larger Test Gauges shall have a pressure range not to exceed --- correct answer --- Twice the test pressure applied Concealed slip joint connections shall be --- correct answer --- Prohibited Kitchen sink tail piece shall be no smaller than --- correct answer -- - 1 1/2' Lavatory tail piece shall be no smaller than --- correct answer --- 1 1/4''
an access openings a 24'' solid walkway from the access opening to the water heater A Type B gas vent pipe must extend at least ____ above a water heater --- correct answer --- 5' Single wall metal vent pipes may be used in residential occupancies --- correct answer --- False Water service yard piping must be installed at least _____ below local frost level. --- correct answer --- 12'' Joints in copper buried under concrete slab must be --- correct answer --- Brazed Clean outs in buildings sewers must be installed at least every --- correct answer --- 100' 2" horizontal drainage piping must be sloped at least --- correct answer --- 1/4'' fall PVC DWV piping may be safely tested with compressed air --- correct answer --- False
Drain receiving chemical waste may NOT be --- correct answer --- Copper San Tees may be used to connect trap arms to vertical drains --- correct answer --- True Combos may be used to connect arms to vertical drains --- correct answer --- False Unless prohibited by structure conditions, horizontal vent pipes must be at least _______ the flood level rim of the fixture being served. --- correct answer --- 6' Sink/ Lavatory tailpieces must be no longer than --- correct answer --- 24' Horizontal drain lines connecting with other horizontal drain lines shall enter through --- correct answer --- combos and wyes Vertical drain lines connecting to horizontal drain lines shall enter through --- correct answer --- Combos and Wyes
A pipe connecting upward from a soil or waste stack to a vent stack for the purpose of preventing pressure changes in the stacks is a --- correct answer --- Yoke Vent Traps typically require a trap seal depth of --- correct answer --- 2"
- 4" Trap arms may be of unlimited lenght --- correct answer --- False Floor drains which aren't used to frequently should have their trap seals protected by trap primers. Per authority having jurisdiction. **_--
- correct answer ---** True All drainage piping from resturants should flow through a grease interceptor **--- correct answer ---** False Grease interceptors generally require no maintenance **--- correct answer ---** False Storm drains can always be piped into the sanitary sewer system **--- correct answer ---** False Roof drains are never required on flat roofs **--- correct answer ---_** False
The UPC maximum design operating pressure of natural gas piping is --- correct answer --- 5 Psi The UPC maximum design operating pressure of LP gas piping is --- correct answer --- 20 PSi Movable internal parts is NOT a requirement of a trap --- correct answer --- True Strainer are required on a roof drain --- correct answer --- True Per UPC, licensed plumbers can legally turn a gas meter valve back on after the gas supplier has turned it off --- correct answer --- False Copper pipe may never be used for Natural Gas piping --- correct answer --- False New natural gas piping systems require testing an inspection before put into use --- correct answer --- True There are no special fittings required to connect plastic gas piping to metallic pi[ing --- correct answer --- False
Per TAS, Wheelchair accessible drinking fountains must have the spout located a maximum of how high above the first floor? --- correct answer --- 36" Per TAS, Standing persons accessible drinking fountains must have the spout located --- correct answer --- 38'' - 43" above finish floor Per TAS, for a wheelchair accessible water closet, the distance from its center to the near side wall must be --- correct answer --- 16" - 18" Per TAS, the top of the seat on an adult wheelchair accessible water closet must be --- correct answer --- 17"- 19" The flush valve handle on an accessible water closet must be on the --- correct answer --- Open side of the water closet The rim of an accessible urinal must be no higher than --- correct answer --- 17" above the finish floor An accessible lavatory must be mounted so that the top, front surface is no higher than --- correct answer --- 34"
New, altered or replaced plumbing shall be left uncovered until inspected and approved --- correct answer --- True The combustion air opening for a water heater installed in the interior compartment of a residence should be at least 1" square inch per: --- correct answer --- 2,000 btu's An approved type pressure regulator should be used when water pressure is over _____ psi --- correct answer --- 80 The water closet has the highest (DFU) drainage fixture unit rating --- correct answer --- True The bathtub has the highest (WSFU) water supply fixture unit rating --- correct answer --- True increasing vents by one pipe size will: --- correct answer --- Allow vent to be longer As per TAS , in accessible building: new construction where more than one drinking fountain for water cooler is provided on a floor, ______% percent is a required to be accessible. --- correct answer - -- 50%
All hand and power tools and similar equipment whether furnished by the employer or the employee shall be: --- correct answer --- Maintained in a safe condition When power operated tools are designed to accommodate guards they shall be: --- correct answer --- Equipped with such guards when in use Employers shall not use or permit the use or permit the use of unsafe - -- correct answer --- wrenches, including adjustable pipe and a socket wrenches shall not be used when jaws are sprung to the point that slippage occurs impact tools such as drift pins wedges and chisels, with mushroomed heads Wooden handles of tools with splinters or cracks Electric power operated tools shall never be of the approved double insulated type of grounded in occurrence with OSHA standards --- correct answer --- True
The use of electric cords for hoisting or lowering tools is acceptable if loaded is not too heavy --- correct answer --- False The use of hoses for hosting or lowering tools shall be permitted if hoses of sufficient size to carry load --- correct answer --- False All fuel power tools shall be _____ while being refueled serviced or maintained --- correct answer --- Stopped Any tool found not in a proper working order, or that develops a defect during use, shall be immediately --- correct answer --- Removed from service and not used until properly repaired When transporting, moving, and storing compressed gas cylinders - -- correct answer --- Valve production caps shall be placed and secured they shall be secured on a cradle, sling, board or pallet Cylinders shall be moved by tilting and rolling them on their bottom edges they shall not be intentionally dropped struck or permitted to strike each other violently
An oxygen enriched (saturated) environment is defined as --- correct answer --- >23.5% oxygen An oxygen deficient environment is defined as --- correct answer --
- <19.5% oxygen The normal oxygen percentage in the atmosphere is --- correct answer --- 21% oxygen
