Omaha Journeyman Practice Test

These questions are part of the practice quiz. Start practicing

• What is the minimum clear space required for cleaning an intercepting trap?
• What is the maximum number of bath tubs allowed on a 3" building drain?
• The purpose of plumbing traps is to:
• The fixture load of a 4 inch branch interval is based on how many per inch per foot fall?
• All Durham soil and waste systems must be of which drainage type?
• The valve control area for a handicapped accessible shower is from what height to what height above the finish floor?
• What material is used for dishwasher waste pumped "below the floor"?
• What is the maximum support distance for underground plastic pipes?
• What is the minimum trap size required for a bidet?
• All new commercial kitchen grease interceptors shall be connected to which of the following?
• How high above the flood rim of a fixture must a vent be extended vertically before it can be run horizontally?
• On a 4-inch mop sink waste that is extended 38 feet from its connection on a horizontal main, what is the minimum size vent required?
• On new construction, a drain is required to be located no more than how many feet from a RPZ assembly?
• What is the maximum depth of a vault housing a water meter?
• The adequate ventilation of plumbing systems is necessary to prevent which of the following?
• What type of water closet installation is permissible in a medical specimen collection room?
• What are the required dimensions for clear floor space on a handicapped accessible urinal?
• Which is the primary purpose of a trap in plumbing systems?
• Construction specifications for inspection manholes installed for grease interceptors are the responsibility of?
• Shower rooms having more than two shower stalls shall provide which of the following near the stalls?
• What is an owner's responsibility regarding grease interceptors?
• What is the function of a trap seal in plumbing?
• Flow control devices for grease traps shall be installed on which of the following?
• When connecting a subsoil drain system by gravity to a storm sewer, what must be used?
• What is the minimum clear floor space required in front of the test parts of a backflow assembly?
• Which of the following describes how a grease trap must operate?
• What schedule pipe is galvanized water pipe required to be?
• Which type of material is never acceptable for use in underground waste and vent systems?
• Under what condition may a water closet be installed without a lavatory in the same room?
• What is the maximum number of back-to-back clothes washers allowed on a four-inch horizontal drain?
• When measuring the maximum height of a testable backflow device, to what should the measurement be taken?
• To install, maintain, and repair testable backflow assemblies, a journeyman is required to be certified through programs approved by which institution?
• What is the fixture unit rating for a typical wash fountain?
• What should be done to prevent backflow in a plumbing system?
• A partition is required between _________?
• What is the minimum trap seal required on a Type 1 interceptor?
• The distance between clean outs on horizontal waste lines larger than 2" shall not exceed?
• What is the maximum height of the flush valve handle for a handicapped accessible water closet?
• What is the maximum height from finished floor to rim for a handicapped accessible lavatory?
• What is the minimum capacity of a grease interceptor?
• When a fixture has an overflow, the waste must be arranged so that standing water in the fixture ___________ in the overflow when the stopper is closed.
• What is the minimum thickness of a closet floor flange?
• What is the minimum depth of a trap seal in inches?
• How many fixtures may be installed or connected to a single grease trap?
• What is the minimum vertical service space required in clean outs regardless of pipe size?
• The minimum knee clearance under a sink for ADA is ______ inches above finish floor.
• What is the minimum vent size allowed for a fixture?
• The relief vent in a multi-story building shall be what size?
• The minimum space allowed between the edge of a lavatory and a wall is?
• A two-way cleanout is not required if the building drain is extended to a manhole that is how many feet or less from the building?
• What is the minimum size measurement inside of a shower stall?
• What is the required supply line for ice machines and coffee dispensers from a minimum 1/2" rigid water pipe?
• For a building drainage system, which material is most commonly used for drainage pipes?
• What grade of brass should be used for tail pieces in commercial plumbing installations?
• When passing through a wood stud, what thickness of steel plate must PVC be protected by?
• What is the maximum depth in inches for the trap seal of a 3" p-trap?
• What is the minimum allowable length of a non-handicapped accessible stall or compartment for a water closet?
• A shower room having 8 multiple shower valves shall be served by a minimum __________ inch drain.
• Which method is appropriate to protect a potable water supply servicing a tank with a toxic solution?
• Joints between no-hub cast iron and any other approved material shall be made with a ________ transition coupling.
• When a lead flashing for a vent stack is used, what is the minimum weight per square foot of the lead?
• What is required for overflow drains where roof drains are installed?
• What is the maximum height from the rim of a wall-mounted urinal to the floor?
• The maximum rim height of a handicapped accessible urinal is __________ inches from the floor.
• Which is the maximum number of water closets allowed on a 3 inch stack in a single family dwelling?
• If two 45-degree ell fittings are spaced how many feet apart, a cleanout is not required?
• What is the primary purpose of a grease interceptor?
• What is not a requirement for a flushometer?
• What is the minimum clear floor space required in front of a shower opening?
• What type of drainage system is typically used for residential garages?
• When can you use a PVC "waste and overflow" on a bathtub in an apartment building?
• A shampoo sink in a beauty shop has a fixture unit rating of ___________.
• How far above the highest point of usage should a pressure vacuum breaker be installed?
• When installing plastic waste piping below grade, what is the minimum clearance required around the entire outer circumference of the pipe or fitting when penetrating concrete?
• What is the minimum depth of lead in a joint when making a lead and oakum joint on bell and spigot pipe?
• What is the minimum waste opening size required on a laundry sink?
• What is the minimum height for a mop sink faucet to be mounted above the finished floor?
• A potable well __________ cross connected with the water supply from MUD if used as an emergency backup to the water supply for a building.
• If a large wash basin for hand washing is 80 inches around, it may be considered as equal to how many lavatories?
• What is the minimum distance above the flood level of a fixture required for an approved air gap?
• What is the minimum number of bands required for no-hub couplings installed underground?
• What is the maximum height that a washing machine drain may be installed above finished floor?
• What is the minimum size for a main cleanout in a residential plumbing system?
• What is the minimum clearance of a handicapped accessible lavatory from finish floor to bottom of apron?
• What is the summation of two standard 90-degree turns in a drain line's total effective length?
• For a shower room with multiple shower heads, what is the minimum drain size required per 10 valves or heads?
• When can a drinking fountain be installed with an indirect waste?
• How much space must be allowed for minimum floor turn around space in an ADA restroom?
• For what purpose may non-potable water be used?
• What is the correct size of a floor drain for a bathroom area?
• A residential dishwasher not connected to a kitchen sink has a fixture unit rating of ___________.
• Spills during the maintenance of grease interceptors must be reported within how many hours?
• What is the minimum required waste pipe size for a trench drain that is 8' long?
• What is the purpose of the plumbing vent system?
• What kind of trap should not be installed in a drainage system?
• What should be done with spills that occur during pumping of grease interceptors?
• What is the minimum size of a floor drain receiving the discharge from a 2 inch RPZ?
• A handicapped accessible lavatory shall have what minimum clear floor space?
• When using lead as a flashing on a roof drain, how far must the flashing extend beyond the outer circumference of the stone guard clamping ring?
• What is the maximum number of clothes washers allowed on a three-inch stack?
• What is the minimum required clearance in front of a water closet?
• Cross linked polyethylene (PEX) pipe may be used for _________ water only?
• What is the minimum clearance for knee space at a cantilever type water fountain from the finish floor?
• Which of the following materials may not be used to secure a closet flange to the floor?
• What is the maximum allowable length of a 2" horizontal waste arm from the combination wye and 1/8 bend fitting to the fixture connection before a revent is required?
• When is a vertical rainwater leader installed inside the building not required to have a cleanout?
• What is the minimum width of the clear space for a handicapped accessible water fountain or cooler?
• What is the maximum clear floor space for a handicapped accessible wall or post water fountain cooler?
• The maximum height of a flush valve handle for a handicapped accessible water closet shall be how many inches from a finished floor?
• What is the primary function of a grease trap in plumbing systems?
• How should the vent from a pneumatic ejector system be configured?
• What is the minimum distance allowed between two water closets, measured center to center?
• For a multi-shower setup, what is the necessary drain size for each 10 shower heads?
• The waste pipe from a garbage can washer shall drain to which of the following?
• What is the minimum required clearance in front of a floor urinal?
• In what position should a water meter be installed?
• What type of cleanout is often used in building sewers for effective maintenance?
• What is the maximum vertical rise allowed for a branch soil line extended to the first floor for specific fixtures?
• If two lavatories are installed back to back in a wall, what is true about their waste connections?
• The combined area of the openings through a floor drain cover must be equal to or greater than what?
• What is the minimum diameter for a floor sink's waistline?
• Chemical and soap dispensing equipment must be connected to which type of supply?
• Clothes washers in a group of three or more have an individual fixture unit rating of?
• What is the minimum size service opening for a whirlpool tub?
• Any potable water supply going to a pressure sewer waste shall be through what?
• The highest fixture connected to a waste or soil stack that does not require a re-vent is referred to as what?
• What material should be used to protect piping passing through walls?
• How many 4 inch vent stacks would be required for a 6 inch building drain?
• Which of these fixtures requires an overflow?
• What is the minimum size for a residential garage drain?
• On building storm drains requiring a manhole, the manhole shall be what distance or less from the building?
• The inlet pipe of a grease interceptor shall extend to how many inches below the liquid level?
• Pressure building sewers shall schedule which PVC pipe and fittings?
• A back flow valve installed in a manhole more than 2 feet deep requires the diameter of the manhole to be at least how many inches?
• Cleanouts in waste pipes 2" and smaller shall have at least how many inches of horizontal space in front of the cleanout?
• Which of the following is not used as an anti-scald device?
• Which type of floor urinal does not have an integral trap?
• What would be the fixture rating for a bar sink with a disposal in a private residence?
• What is the mandated distance between any two lavatories in a series installation?
• Which body of water is typically not allowed to directly connect to a sewer system?
• Wash fountains have a fixture unit rating of ________.
• What can the discharge point from a subsoil drain do?
• In what position can a no-hub reducing coupling be used?
• On a horizontal waste branch ________ feet or less in length, the fixture outlet may be termed a cleanout.
• Slip joint compression type waste line connections shall be accessible for what purpose?
• A handicapped accessible water closet shall be _________ inches from the wall to the center of the water closet.
• What is the required distance of a cleanout from a building foundation?
• What type of valve must be installed to protect quick closing valves on water lines?
• The chambers of a grease interceptor shall be accessible from the surface by means of a separate _______________ inch opening.
• What is the correct mounting height for a Reduced Pressure Zone (RPZ) device?
• Which material is commonly NOT used for drainage systems?
• What is the maximum net square footage allowed for a unisex restroom in a retail business?
• What is the minimum width requirement for a doorway in a residential building?
• Which term refers to the maximum allowed flow of a fixture based on its nominal size?
• What is the minimum discharge pipe size required from a sump or receiving tank for sewage pump systems?
• The heel inlet of a heel inlet one quarter bend shall be installed only in the _________ position.
• What is the correct position for a vent stack when installed for a plumbing fixture?
• Which pipe material is typically used for drainage systems?
• Dielectric unions may be used if installed in which area?
• Trench drains used in chemical or corrosive conditions shall be made of ___________________.
• Which of these steps would not be an acceptable solution to prevent cross connection from threaded faucets?
• What is the fixture unit rating for a typical residential bathroom sink?
• To ensure accessibility, what type of installation is preferred for dielectric unions?
• What is the function of a grease interceptor?
• How much clear space is required above a water closet?
• What is the minimum number of employees that require adequate toilet facilities on construction sites?
• Where shall drinking fountains or water coolers not be installed?
• What is the common unit for measuring plumbing fixture loading?
• How should waste from a commercial type dishwasher be piped?
• What is the minimum slope required for the floor to the floor drain in a public restroom that sells food or drinks?
• Where must the outlet pipe in a grease interceptor originate?
• All commercial garage drains shall be a minimum size of how many inches?
• What is the minimum diameter for a commercial garage drain?
• A relief vent is required when there are how many or more branch intervals?
• Cleanouts are required on building sewers at intervals not to exceed how many feet?
• A pressure vacuum breaker shall be installed a minimum of _________ inches above the highest point of usage.
• What is the minimum clearance required for a cleanout in a horizontal waste pipe?
• What is the critical criteria for the installation of a running trap?
• What is the maximum slope of a battery vented soil or waste branch?
• All commercial garage drains shall connect to a ________ interceptor.
• How many inches from the side of a urinal to any wall or partition is the minimum?
• What type of water supply is recommended for chemical dispensing?
• A manhole is required when installing a rainwater leader on _______ inch or larger pipe.
• Under what condition are two-way clean outs not required on building storm drains?
• At what height above finished floor should a cleanout be installed above a water closet?
• What is the primary purpose of a grease interceptor in a commercial kitchen?
• What is the maximum number of water closets that would be allowed on a 4" building drain with 1/4 inch slope?
• What is the minimum height for a bathroom ceiling?
• When may a water heater be connected using a flexible connector?
• Handicapped accessible water closets height is measured from the finished floor to the top of the what?
• A sump that receives the waste from a single floor drain does not require what?
• What is the minimum required clear space in front of a lavatory?
• Non-potable water lines shall be labeled with __________ labels and ________ letters.
• How is the waste system for a grease interceptor vented?
• What is the minimum size concrete pad for a two-way cleanout on a building sewer?
• How far can a pump and motor on a whirlpool tub be located from the access opening?
• The relief vent in a battery venting situation shall be no smaller than ______________.
• What is the minimum size plastic soil or waste pipe that may be installed underground?
• When a back water valve is installed in a subsoil drain system, it is required to be in a minimum ______________ inch diameter manhole.
• What type of materials are trench drains made of in corrosive conditions?
• How often shall all grease interceptors be pumped?
• Which of the following criteria does not apply to a 4-inch running trap?
• A commercial disposal with a three-inch trap has a fixture rating of what?
• What is the purpose of a back flow valve in plumbing systems?
• The distance between clean outs on a 2" horizontal waste line shall not exceed how many feet?
• A pan shall be provided for all floor drains when it is installed where?
• If a 2 inch area drain is connected to a properly vented sanitary building drain, what is the maximum distance allowed between the building and the trap before a vent is required?
• What is an essential requirement for slip joint waste line connections?
• Grease interceptors cannot be made of which type of material?
• What is the maximum discharge temperature allowed for a Type IV interceptor?
• Under what conditions are enzymatic grease interceptors allowed?
• Which of the following back flow preventers cannot be used in a continuous pressure situation?
• All residential garage drains shall be classified as which type of drains?
• What is the minimum vent pipe size from a sump or receiving tank for a sewage pump system?
• A sump pump located in an elevator pit shall discharge as what?
• Which of the following cannot be used for backflow protection in a high hazard?
• What is the minimum access opening required for a backwater valve installed inside a building and less than 24 inches deep?
• What is the minimum required depth for a mop sink?
• If a type I interceptor is 18 feet from the point of connection to the building drain, what is the minimum size vent required?
• What is the earliest time after installation that a new water meter can be examined for accuracy?
• When a stack is extended above the first floor to receive the discharge of plumbing fixtures, the stack vent must be what?
• What is the minimum trap seal for a shower?
• What is the minimum waste pipe size for a residential food waste grinder?
• What is the primary purpose of having a floor drain in a shower room?
• Which of the following materials is commonly used for laying drainage pipes?
• Which of the following shall not be installed in a new commercial kitchen?
• What is the minimum required distance from the center of a water closet to the center of a urinal?
• To determine minimum roof drain square feet, what must be added to the roof area of a roof measuring 40' by 20' with a vertical wall on one side measuring 4' by 40'?
• What is the minimum clear floor space required in front of a handicapped accessible lavatory?
• According to plumbing codes, how far can a vent be from the trap it serves?
• Type K or L soft copper is permissible when placed in which orientation in a partition on remodel only?
• Which type of trap is legal for use in plumbing installations?
• What is the minimum width of a stall for a non-handicapped water closet?
• Under which condition are wells not required to be protected by man RPZ?
• A shower waste shall run independent of other fixtures directly to a _______ inch or larger waste.
• What is the minimum diameter required for a removable shower strainer?
• Subsoil drainage systems cannot be discharged into what?
• Which fixture is allowed in a new commercial kitchen according to the provided regulations?
• How many fixtures can be discharged onto a stack above a stack vented water closet?
• What is the typical slope required for a horizontal drain line?
• What is the required clearance in front of a pedestal urinal?
• When installing water supply lines, what is a common requirement for backflow prevention?
• What is the minimum waste pipe size required for a shower?
• How long must you wait before retesting if you do not pass a plumbing-related exam?
• When can a circulation pump for a whirlpool tub be installed below the fixture trap?
• What is the minimum allowed thickness of the concrete installed to encase a trench drain?
• For piping larger than two inches in diameter, how many inches of horizontal service space shall be provided in front of the cleanout?
• The purpose of an interceptor is to?
• Which of the following plumbing fixtures requires the least water flow capacity?
• For clothes washers, what unit rating applies when there are individual units in a group of three or more?
• What is the minimum waste pipe size for a type 1 interceptor?
• Water leaking from a properly installed atmospheric vacuum breaker may be caused by what issue?
• What gauge brass must all tubing used for tail pieces in commercial installations be?
• Which type of interceptor requires the greatest minimum trap seal?
• What type of fitting is required at the base of a vertical stack to allow for cleaning?
• What type of valve is commonly used for shutting off water supply in residential plumbing?
• Which fixture is not permissible for wet venting a water closet?
• What is the minimum allowed slope of the bottom of a trench drain?
• What is the maximum vent size allowed for two water closets installed back to back?
• What should be the distance from a sewer connection to the drinking water supply?
• In plumbing, what is the minimum thickness for concrete encasing trench drains?
• What is the minimum height of a trap arm vertical from the trap outlet?
• What is the minimum combined area "in square feet" of a mopsink?
• What is the primary responsibility of the plumber concerning water supply?
• What is the primary material recommended for building drains in commercial installations?
• What is the appropriate vent size for a bathroom sink drain?
• Which of the following fixtures requires an independent isolation valve?
• A pedestal urinal has a fixture unit rating of how many units?
• When installing a horizontal soil line, a clothes washer branch connection may not be connected closer than how many feet downstream from a water closet opening?
• Which type of trap is typically used in kitchen sinks?
• What is the maximum number of side by side clothes washers permitted on a 4 inch horizontal waste?
• What is the minimum required depth of a floor sink?
• The seal of every fitting trap in a plumbing system shall be protected by a ________.
• What is the maximum amount of fixtures allowed on a single battery vent?
• A water closet in an establishment serving liquor is rated as what number of waste units?
• If a vent stack terminates 4 feet from a ventilation grill, what must be done?
• What is the function of a thermostatic mixing valve?
• What is the function of a vent stack in a plumbing system?
• The minimum liquid depth of a type III interceptor is _______ inches.
• When may grease traps be installed?
• When a scupper is used as an overflow, drains must be?
• When is it permissible to connect a storm drain to a sanitary sewer?
• Is the installation of a pressure vacuum breaker inside a building allowed?
• Flexible water supplies for plumbing fixtures may exceed the maximum ________________ length limitation if necessary for structural and or mobility reasons.
• Which material is typically used for a lead and oakum joint?
• Which fixture's final waste connection cannot be made using a compression gasket?
• All below grade water supplies, one inch and smaller in size, shall be made of what type of copper?
• What is the maximum spout height of a handicapped accessible drinking fountain?
• What must be considered when determining drain sizes for a commercial kitchen?
• Which type of valve would be inappropriate to use for anti-scald devices?
• What is required when a bypass is installed around a RPZ?
• What is the minimum allowed distance from the floor to the center of the tee serving a clothes washer?
• A single waste fixture unit is equal to how many gallons per minute?
• The rim or counter surface shall be no higher than ________ inches above the finished floor on a handicapped accessible lavatory.
• In plumbing systems, cleanouts are generally installed to facilitate what process?
• What type of drainage system is required for a facility with multiple food service areas?
• A transition coupling may be used to ___________.
• A service sink with a three inch trap standard would have a fixture unit rating of?
• When installing plastic pipe underground, what is the maximum distance between supports that secure the pipe to the bottom of the trench?
• What is the minimum inside diameter for a manhole used for a cleanout with more than one inlet?
• What is the minimum required slope for a horizontal vent line?
• What is the maximum allowed distance from the finished floor to the center of the tee serving a clothes washer?
• What is the purpose of a vent in a plumbing system?
• What is the minimum rated flow capacity for a grease trap?
• A reduced pressure principle backflow might discharge how many times the rated flow of the device?
• What is the minimum size waistline for a floor sink?
• On a horizontal branch, what is the maximum distance from the fixture opening that a vent can be connected?
• A water closet in a retail establishment has a fixture unit rating of how many?
• In plumbing, what does RPZ stand for?
• When is a business required to allow the public access to the restrooms?