Texas Master Plumber Practice Test

These questions are part of the practice quiz. Start practicing

• Gas water heaters must have combustion air access from which two points?
• What is the maximum door height above the finished floor for top loading washing machines?
• What is the requirement for joints where fixtures contact walls and floors?
• Each contract must contain specific information on the front page, including:
• What designation is used for safety glasses according to safety standards?
• How is 'short-term' defined for excavations?
• What is the maximum allowable slope for trenches installed parallel to footings that do not extend below the bearing plane?
• What is the maximum knee clearance height for elements above the finished floor?
• At what pressure should hose subjected to flashback or severe wear be tested?
• What is the maximum length for flexible fixture supply lines?
• What is the minimum discharge size for a sewer ejector pump in single-family dwellings?
• What is the primary purpose of providing clearance for rodding on cleanouts?
• What is the minimum diameter for connectors to water heaters?
• What is the minimum distance from vertical support for the spout location for seated drinking fountains?
• What must be in place when transporting, moving, or storing compressed gas cylinders?
• What is the maximum duration PEX piping can be exposed to sunlight?
• What is the maximum distance from the front edge of the drinking fountain to the spout for seated persons?
• What type of gas is classified as LP Gas?
• How far away must oxygen cylinders and fittings be kept from oil or greasy material?
• What is the maximum hot water discharge temperature allowed for public lavatories?
• What is the maximum allowable slope for excavations between 8 and 12 feet in depth?
• What is essential to connect waste plumbing fixtures to a sewage system?
• How should each well of a multiple-compartment commercial sink discharge?
• How should drainage pipes be tested to ensure proper functionality?
• What is the maximum allowable slope for excavations in type B soil that are less than 20 feet deep?
• Which of the following components is used to prevent sewer gas from entering a building?
• How far away from an excavation site must egress be located for safety?
• What features must whirlpool and other bathtubs have?
• Where must a shutoff be installed if the gas system serves more than one building?
• Under what condition is a thermal expansion tank required?
• What type of property is specifically described as being subject to taxation to fund county services?
• Gas shutoff must be located within what distance of the water heater?
• What is the maximum height for drinking fountain spouts for seated persons?
• The front of lavatories and sinks should be installed at a maximum height of __________ above the finished floor.
• What must be done to controls that are deactivated during work on equipment or circuits?
• A battery of fixtures can contain up to how many fixtures?
• For grab bars, what is the minimum force they must be able to withstand?
• What must be obtained before work commences to avoid a penalty?
• For handicap accessible bathtubs, the clearance must extend __________ in front of the bathtubs.
• What is the minimum support spacing for 1/2" gas pipe?
• Where should the controls for handicap accessible bathtubs be located?
• What is the recommended installation point for a pressure vacuum breaker?
• What is the maximum length allowed for connectors to water heaters?
• What is the minimum weight capability that each scaffold and its components must support?
• What is essential for ensuring safety with gas water heaters in terms of ventilation?
• What is the minimum length of a shower spray unit hose for handicap accessible bathtubs?
• Which of the following do NOT fall under the Texas Accessibility Standards?
• Pipes must be protected from breakage when passing under or through what?
• What is the main concern when considering cross connections?
• What is a requirement for water closet seats regarding their position?
• What role does an air gap play in plumbing?
• What characterizes a 'Combination Waste and Vent System'?
• When using a test gauge, what range is considered acceptable for a proper plumbing system test pressure?
• What component must always be included with a bottom-fed water heater?
• What gas should never be used to test gas lines?
• What is the main function of the trap seal in plumbing systems?
• Where must each fixture be trapped with a separate trap located?
• Where are gas water heaters not permitted to be installed?
• What type of vents are required for LP appliances?
• What is the minimum spout height for drinking fountains designated for standing individuals?
• Where must overflows drain if they are located on a fixture?
• What is a 'Branch Vent' in plumbing?
• The legal structure that offers the most liability protection is which of the following?
• A Responsible Master must carry a minimum of how much insurance?
• When transporting gas cylinders, what aspect of safety related to handling must be followed?
• What is a critical aspect of trap seal maintenance?
• Which material is not acceptable for gas piping in water heater installations?
• What materials should water closet screws and bolts be made of?
• Where should LP room heaters never be installed?
• How often should chemical systems be inspected?
• Tangible personal property may include which of the following?
• Wall-hung water closets must be supported by what type of structure?
• When are drain pans required for water heaters?
• Toe clearance is defined as the space between which two measurements?
• What must a licensed plumber display on both sides of all service vehicles?
• What is a stack vent?
• How many board members are on the Texas Board of Plumbing Examiners?
• How should combustion air for LP appliances be provided?
• How often should vertical support be provided for 1-1/4" or larger gas pipe?
• Where should pipe joint compound be applied?
• What is the minimum toe clearance depth in toilet compartments?
• Are sediment traps required on gas grills or decorative lighting?
• What is the maximum allowable slope for simple slope excavation that is 20 feet or less in depth?
• A water heater can be what type of connection?
• Where are drinking fountains prohibited?
• What is the minimum guardrail height required on scaffolds?
• What is commonly required for horizontal support of large copper pipes (1 1/2 inches or larger)?
• Employers are required to do what regarding FICA payroll taxes?
• What is the minimum floor drain trap size requirement in a coin-operated laundry facility?
• In an ambulatory accessible water closet, what is the minimum distance of the water closet's centerline from the side wall?
• What is the maximum diameter for threaded pipe used in fuel gas systems?
• Which of the following tools must have a constant pressure switch?
• What defines the 'Building Drain' in a plumbing context?
• Newly hired employees must be reported to which office?
• What safety measure must be implemented for scaffolds to ensure they are safe to use?
• Which of the following is not a part of the drainage system?
• Which of the following is a characteristic of a Residential Dwelling Unit?
• What is a common method for food equipment to prevent contamination during discharge?
• What is the minimum width required for access and egress to shower compartments?
• In trench excavations at least 4' deep, what is the maximum lateral travel to access egress?
• What is the primary purpose of drainage testing?
• What is the minimum clearance around a water closet measured from the side wall?
• The larger the vent, what can be assumed?
• How close can vents be installed to the trap weir?
• What is the minimum clearance required for rodding on cleanouts that are 6 inches and smaller?
• What is the minimum height that vents must rise vertically above the flood level rim of the highest fixture served before turning horizontal?
• What is a requirement regarding emergency shower flow rates?
• Excavations greater than what depth must be designed by a registered professional engineer?
• How is technical infeasibility primarily determined?
• What is the minimum gauge for tracer wire according to IPC standards?
• What is a soil pipe used for?
• In plumbing terminology, what does the term 'Stack' refer to?
• What must all vents and caps be, according to regulations?
• Equipment discharging non-potable water to the drainage system should discharge how?
• What must be provided for slip-joint connections?
• Which type of soil is considered the least stable?
• What does Reduced Pressure Principle Assembly (RPPA) primarily address in high hazard applications?
• How long after removing a license from a company does it remain affiliated with that company?
• Operable parts should not require what type of physical interaction?
• What materials or substances should be avoided in the drainage system to maintain safety?
• What is a requirement for head protection helmets?
• What is the required trap seal range?
• What is not permissible for gas piping to water heaters?
• What is the horizontal support requirement for copper pipes smaller than 1 1/2 inches?
• How often should emergency showers be inspected for compliance?
• For piping systems located inside a building, what is the maximum operating pressure allowed?
• What is the minimum type of copper water pipe required?
• How should connections for rainwater catchment be marked?
• What is the minimum height of water closets?
• What is the maximum height of water closets?
• What is the minimum test duration required for gas lines at a pressure of at least 10 psi?
• What is the maximum allowable slope for excavations less than 20 feet made in solid rock?
• What is the minimum knee clearance depth required at a height of 9 inches?
• Which of the following is an implication of being a Sole Proprietor?
• What types of liquids should not be deposited into the drainage system?
• Which business structure does not require a registered agent in Texas?
• How many hours in advance must utility companies be contacted to locate underground installations before digging?
• How high must washing machine standpipes extend above the trap weir?
• What is the minimum rise required for gas water heater vents?
• What type of soil is classified as the most stable soil type?
• What is the maximum vertical bench height for excavations 20 feet or less in depth?
• How is BTU defined?
• What is the acceptable depth range for toe clearance?
• What is required for water supply and drain pipes under lavatories and sinks?
• Which of the following best describes the liability of a Sole Proprietor?
• What is the minimum depth measurement required for urinals from the outer face of the urinal rim to the back of the fixture?
• What color is the piping for alternate water sources supposed to be?
• Which part of the piping system is described as 'any part of the piping system except a riser, main or stack'?
• In toilet compartments for children's use, what is the minimum toe clearance height above the finished floor?
• Why must all pipe be reamed to the full inside diameter?
• Which element is critical for ensuring no backflow occurs in a plumbing system?
• What is the maximum allowable slope for all benched excavations 20 feet or less in depth?
• Which legal structure provides the least legal protection for business owners?
• What is an essential requirement for the installation of non-potable water systems?
• What is the recommended height for flush controls on hand-operated urinals?
• For water closets, hand-operated flush controls shall be installed at a maximum height of __________ above the finished floor.
• Urinals must have the rim at a maximum height of __________ above the finished floor.
• What is a 'Combination Fixture'?
• What is the minimum support spacing for 3/4"-1" gas pipe?
• What determines the height requirements of water closets?
• What best describes transient lodging?
• What defines the difference between water supply and water distribution piping?
• What does the Pressure Vacuum-Breaker (PVB) address in high-hazard applications?
• What type of water closets are required in public and employee toilet facilities?
• What is a cross connection in plumbing?
• Which type of lodging is NOT considered a Residential Dwelling Unit?
• How long must hand-operated metering faucets remain open at a minimum?
• For drinking fountains, what specifications are required for one of them?
• When seeking a mechanic's lien, special rules apply to what type of property?
• Field representatives for the Board are to:
• Trenches installed parallel to footings must not extend below what specific structure-related measure?
• What is the appropriate location for the bottom of the door on front loading washing machines above the finished floor?
• Which of the following defines a fixture trap?
• How far apart should water closets be set from the center of one fixture to the center of another?
• Which type of fitting is commonly used to change the direction of piping?
• What should be done with hoses that have been worn or damaged?
• When must an approved mechanical water hammer arrestor be installed?
• What is a Residential Dwelling Unit?
• Hand-operated flush controls for urinals should be installed at a height of __________ above the finished floor.
• What linkage is required for gas piping to prevent leaks and maintain safety?
• What is the required grading for LP gas?
• What material should piping for LP gas systems be made of?
• What is the minimum water supply diameter and the maximum pressure allowed?
• What is the maximum vertical distance from the outlet of the fixture to the trap weir?
• What is the minimum access opening required for whirlpool pumps located 2 feet or more from the opening?
• What is a 'Common Vent' used for in plumbing?
• When is work on scaffolding prohibited?
• What is the consequence of failing to obtain the necessary permit before work begins?
• How long should the clearance in front of handicap accessible bathtubs be?
• What is the maximum height for spout outlets of drinking fountains for standing persons?
• In order for a water heater to be safely installed in a garage, what is the minimum clearance requirement?
• What type of protective footwear is required by employers?
• In transfer-type shower compartments, where should the controls be installed relative to the seat?
• How many BTUs are in one cubic foot per hour (CFH)?
• What should be done to pipes when passing under or through walls?
• What is the minimum width for wheelchair accessible compartments for wall hung water closets?
• Which requirement determines the safety of water used in plumbing?
• When do the Texas Accessibility Standards apply?
• What is the required outside diameter of grab bars with circular cross sections?
• In a plumbing system, which component directly works to resolve back-pressure issues?
• Unisex toilet rooms must contain how many lavatories and water closets at maximum?
• Licensed plumbers must have license number ___________ and must be truthful.
• What is the minimum size for outdoor combustion air openings?
• What is the status of trough urinals in plumbing code?
• What describes an indirect waste?
• What is the purpose of an individual vent in plumbing?
• What is the minimum toe clearance height above the finished floor in toilet compartments?
• What is the penalty if you renew your license late?
• Floor drains must be constructed with a minimum diameter of:
• What should you do if you encounter rock during excavation?
• What aspect must comply with regulations for restroom facilities?
• What configuration of a shower spray unit is required in handicap accessible bathtubs?
• What must be done before entering excavations over 4' in depth where oxygen deficiency is possible?
• How much does the knee clearance reduce for every 6 inches in height above the finished floor?
• For handicap accessible bathtubs, controls must be positioned between the bathtub rim and __________.
• All licensees must have _________ of continuing education to renew a license.
• What must be indicated on the label for side wall clearance and working pressure?
• Which of these describes a vertical plumbing pipe?
• What is the minimum diameter required for clothes washer standpipes?
• What does the term 'Air Gap' refer to in plumbing?
• What feature must doors to unisex toilet and bathing rooms have?
• Steel plates are required for protecting piping when they are how close to an edge?
• What is the maximum height above the finished floor for the top of bathtub seats?
• How far from the area of heat application must toxic preservatives be stripped from surfaces?
• What is the minimum seat height of a water closet above the finish floor?
• Licensed plumbers may be required to ______________ to prove competence.
• What condition would make a task "Technically Infeasible"?
• What does developed length refer to?
• What is the minimum number of drinking fountains required?
• Chemical systems must be drained and vented through what type of piping?
• Who is responsible for providing Personal Protective Equipment (PPE)?
• What is the minimum height requirement for a drain pan?
• Which action must a plumber take to install LP gas?
• What type of barrier can be used to separate oxygen cylinders from fuel gas cylinders?
• What type of issues does a Double Check Valve Assembly (DCVA) address in low-hazard applications?
• Which feature is important for compliance in restroom facilities for accessibility?
• What is the maximum allowable pressure for LP gas?
• Where should gas meters not be installed to avoid potential issues?
• What is a vertical pipe defined as?
• What is the consequence of failing to match employee contributions to FICA?
• If the license is expired, ____________.
• Which plumbing component is mandatory to prevent back-siphonage in low-hazard applications?
• Electric power operated tools must be of what type?
• Which type of entity allows for greater liability protection for its owners compared to a Sole Proprietorship?
• What is the minimum width range for ambulatory accessible toilet compartments?
• Trap seals are protected from back pressure and siphonage by what?
• Vents must rise vertically to what height before any horizontal run?
• A licensed plumber must be truthful to clients regarding which of the following?
• What is the function of a yoke vent?
• For excavations 12 feet or less in depth, what is the maximum allowable slope?
• What should be the minimum depth of a wheelchair accessible compartment for floor mounted water closets?
• Gas piping to water heaters can be made from which materials?
• What is the minimum width required for toe clearance?
• What must be found inside each helmet?
• What is a required feature for at least one drinking fountain according to codes?
• What is the maximum seat height of a water closet above the finish floor?
• For a pipe size of 2-1/2 inches and smaller, what is the minimum required fall?
• What should be the minimum depth of ambulatory accessible toilet compartments?
• What should not penetrate the metal housing for fuel gas appliance connectors?
• What is the primary purpose of venting in plumbing systems?
• In a wheelchair accessible compartment, how far should the centerline of the water closet be from the side wall?
• In what increments is a surveyor's rod broken up?
• What does a 'Cleanout' in a drainage system provide?
• What does "Technically Infeasible" refer to in the context of alterations?
• According to OSHA, what must hazardous chemical labels contain?
• What is the maximum height required for knee clearance depth at a height of 9 inches?
• What safety feature must electric corded tools and equipment use?
• How must all food storage and handling equipment discharge?
• What is the recommended pressure for testing gas lines?
• A drip leg is required at the base of how many risers when water vapor is present in gas?
• If more than the minimum number of drinking fountains are provided, what percentage must comply with certain specifications?
• What is the required height range for the top edge of a guardrail above the platform surface?
• How many field representatives are employed by the Texas Board of Plumbing Examiners?
• What is the minimum distance the controls in a transfer-type shower compartment must be above the shower floor?
• How far apart must oxygen cylinders be from fuel gas cylinders in storage?
• What is the minimum size for a floor drain that must have a removable strainer?
• Which condition indicates that scaffolding work should be avoided?
• If a water heater is located in the attic, what is the required access height to the heater?
• What is the maximum vertical side height for excavations between 8 and 12 feet in depth?
• LP Gas is defined as what type of substances?
• Why must drinking fountain spouts produce a flow of water at least 4 inches high?
• The board ___________ publish the name of a person filing a complaint.
• What is the minimum width required for knee clearance?
• If a bottom feed water heater is used, what must the cold water connection have?
• For which of the following fixtures are vents not required?
• Hand-held power tools must be equipped with what type of switch?
• What is the standard stub-out height for a wall-hung toilet?
• Which Texas government office accepts initial company registrations?
• What is the maximum knee clearance height for elements above the finished floor?
• What is the minimum discharge size for a macerating toilet?
• Tangible personal property can include all of the following EXCEPT?
• What is the acceptable temperature range for emergency showers?
• What is classified as a drain in plumbing systems?
• What type of valve shall be installed on the discharge side of water meters?
• What is the best way to connect a hosebib to a PEX system?
• The trap seal should typically be maintained between what measurements?
• Which plumbing component is primarily concerned with air circulation?
• For excavations less than 20 feet deep in type C soil, what is the maximum allowable slope?
• What does it mean for solder to be lead-free?
• Which of the following statements about plumbing regulations is true?
• Operable parts should require a maximum activation force of __________.
• What two components are required on a sewage ejector pump?
• What is the minimum spacing for support of gas pipe that is 1-1/4" or larger, when placed vertically?
• How high above the dam or threshold must nails and perforations of shower liners be?
• What does the critical level on a vacuum breaker indicate?
• What is the purpose of a vacuum breaker?
• What is the minimum clearance required for a single wall vent for gas water heater vents from combustible material?
• What is the purpose of sediment traps in gas systems?
• What is the minimum distance that a shutoff valve must be from each appliance?
• In what condition must oxygen cylinders be kept regarding oil and grease?
• What is the maximum weight for Class A or C head protection?
• For every how many floors is a yoke vent required?
• What is the function of the 'Building Sewer' in plumbing?
• Which of the following statements is correct regarding support spacing for gas pipes?
• What does the term 'rough in' refer to in plumbing?
• What is the purpose of a circuit vent in plumbing?
• What is the primary function of a trap in plumbing?
• What is a primary responsibility of the Texas Workforce Commission?
• At what water pressure must a pressure-reducing valve be installed?
• What is the main reason for using lead-free solder?
• When should the atmosphere in an excavation be tested?
• What does the term 'main' refer to in plumbing?
• What safety considerations must be taken into account when designing drainage systems?
• How is the trap seal defined in plumbing?
• Where should a circuit vent or loop vent be placed to effectively serve a battery of fixtures?
• After you move, you must update your address with the Board within __________.
• Which appliances are considered when measuring the maximum length of flexible fixture supply lines?
• What is the key role of a rough-in phase in plumbing?
• What is the minimum support spacing for 1-1/4" or larger gas pipe when positioned horizontally?
• What type of ventilation must be provided in confined spaces for proper combustion of heaters?
• For compliance, what must be ensured whenever multiple drinking fountains are installed?
• Which type of water is referred to as potable water?
• In designing unisex toilet rooms, what is restricted?
• If testing with a gauge between 10 psi to 100 psi, what increment must it have?
• What construction feature is essential for head protection helmets to ensure safety?
• What components must water closet tanks contain?
• Which of the following is true regarding the installation of shutoff valves?
• What is the minimum water depth required when testing shower liners?
• Atmospheric Vacuum Breaker (AVB) is used to address what type of issue in low-hazard applications?
• What should be done to ensure that emergency showers function properly?
• If a license law is violated, what action can the board take?
• What must not be used for hoisting or lowering tools?
• Excavations greater than how many feet deep must be designed by a registered professional engineer?
• What is the purpose of a crown vent?
• What does a vent stack primarily provide in a plumbing system?
• Water heaters must be raised above floor level by how many inches if they are located in a garage or storeroom?
• Master plumbers must be ____________ all work performed which is permitted under his license.
• Whose rules determine who can be classified as a contractor rather than an employee?
• Where must vents be connected to horizontal pipe?
• Are apprentices required to take continuing education?
• Where should flush controls be located on a water closet?
• Copper piping is code approved for gas water heaters only if what condition is met?