Download Rhode Island Journeyman and Master Plumber Exam 2025: Questions and Answers and more Exams Water and Wastewater Engineering in PDF only on Docsity!
RHODE ISLAND JOURNEYMAN | MASTER PLUMBER
EXAM 2025 | ALL QUESTIONS AND CORRECT
ANSWERS | VERIFIED ANSWERS | LATEST EXAM |
GRADED A+ (JUST RELEASED)
Backflow for an automatic clothes washer is prevented by: --------- CORRECT ANSWER-----------------Integrally installed air gap or backflow preventer Waste from an automatic clothes washer discharges through an --------- CORRECT ANSWER-----------------Air Break Water connection to a bidet protected by an ---------CORRECT ANSWER--- --------------Air Gap or Backflow Preventer Water connection to a dishwasher is protected by an ---------CORRECT ANSWER-----------------Air Gap or Backflow Preventer Roof drains shall have strainers extending above the roof a minimum of: --- ------CORRECT ANSWER-----------------4" Separate toilet facilities are not required when ---------CORRECT ANSWER-----------------There are 15 or less employees Minimum pitch for 2 1/2" piping and smaller is: ---------CORRECT ANSWER-----------------1/4"
Minimum size wet vent piping is: ---------CORRECT ANSWER----------------- 1 1/2" What is the minimum supply tube to a one-piece toilet? ---------CORRECT ANSWER-----------------1/2" OD What is the line in the building that carries water from the roof to the sewer called? ---------CORRECT ANSWER-----------------Conductor What is the minimum and maximum length of a waste stack to a trap weir? ---------CORRECT ANSWER-----------------18" and 42" What must be installed before connecting and irrigation system to a potable water supply? ---------CORRECT ANSWER-----------------A pressure reducing backflow preventer Can combustible liquids that condense be allowed down the public sewer? ---------CORRECT ANSWER-----------------Always follow the manufacturers instructions How should a grease trap be sized when hooking it up to a commercial food waste grinder? ---------CORRECT ANSWER-----------------It should be sized to the outlet of the food waste grinder
The slip joints on a tub waste should be _____________ during a test. ------ ---CORRECT ANSWER-----------------Accessible Copper tubing 1 1/4" in diameter and above should be supported every ______ feet. ---------CORRECT ANSWER-----------------5 Feet A vent, which connects several individual vents to a vent stack is called a _________________. ---------CORRECT ANSWER-----------------A branch vent At what pressure does RI require a PRV? ---------CORRECT ANSWER------ -----------80 psi It is required by the general contractor to have a clean restroom facilities on the job? ---------CORRECT ANSWER-----------------True What are the requirements for an air test on a drainage system? --------- CORRECT ANSWER-----------------Must hold 5 psi for 5 minutes How many gallons does a urinal use during a flush cycle? --------- CORRECT ANSWER-----------------1 gallon A commercial food waste grinder should be trapped ___________________. ---------CORRECT ANSWER----------------- Individually
A commercial food waste grinder should have a minimum outlet of _____________. ---------CORRECT ANSWER-----------------2" What is required to be utilized in the waste of a clothes washer waste? ------ ---CORRECT ANSWER-----------------Air Break Unobstructed vertical distance through the free atmosphere between the outlet of the waste pipe and the flood level rim of the receptacle into which the waste pipe is discharging. ---------CORRECT ANSWER-----------------Air Gap Bored, Dug and Driven are examples of what? ---------CORRECT ANSWER-----------------Well The vertical distance from the fixture outlet to the trap weir shall not exceed ________________ and the horizontal distance shall not exceed _______________ measured from the centerline of the fixture outlet to the centerline of the inlet of the trap. ---------CORRECT ANSWER----------------- 24" and 30" How much of a vertical wall should be added to the square footage calculation of a roof? ---------CORRECT ANSWER-----------------Half the square footage of the vertical wall
How many feet of 3/4 copper tubing does it take to hold 1 gallon of water? - --------CORRECT ANSWER-----------------X=1/(.0408x.5625) X=1/. X=43.57' How many roof drains are required on a roof under 10,000 square feet? ---- -----CORRECT ANSWER----------------- 2 How many roof drains are required on a roof over 10,000 square feet? ------ ---CORRECT ANSWER----------------- 4 How many inches must the strainer of a roof drain extend above the roof? - --------CORRECT ANSWER-----------------4" A sewer must be buried a minimum of ____________ below grade. --------- CORRECT ANSWER-----------------36" below grade A drinking fountain cannot be installed in a _____________. --------- CORRECT ANSWER-----------------A Men's Room The critical level of an atmospheric vacuum breaker must be installed a minimum of __________ above the flood level rim of the fixture or device. - --------CORRECT ANSWER-----------------6" The minimum size vent in RI is ____________. ---------CORRECT ANSWER-----------------1 1/4"
Can other fixtures vents be tied to a Clinical Service sink in a hospital? ------ ---CORRECT ANSWER-----------------Yes, 6" above the highest fixture on that floor. State of Rhode Island Plumbing Code is known as: ---------CORRECT ANSWER-----------------Plumbing Code Regulation SBC- 3 Water Services Shall Be Installed Not Less Than: ---------CORRECT ANSWER-----------------4' 6" Below Grade Piping installed in exterior walls or areas subject to freezing must: --------- CORRECT ANSWER-----------------Insulated/Heated or Both Building Sewers connected to a public sewer shall have a minimum coverage of: ---------CORRECT ANSWER-----------------36" Below Grade A safe waste pan shall be installed ---------CORRECT ANSWER--------------- --Under a water heater 6 gallons or greater that is elevated A safe waste pan shall be at least ---------CORRECT ANSWER----------------
- 2" deep with 2" clearance around heater Water service piping and building drain/sewer shall be separated by: --------
- CORRECT ANSWER-----------------10' undisturbed compacted earth
Strainer plates on drain lines for rodent proofing must have openings: ------- --CORRECT ANSWER-----------------0.5 inches Sleeves for pipes passing through foundation walls or under footings shall be: ---------CORRECT ANSWER-----------------Two pipe size greater than the pipe passing through it Travel distance to toilet facilities in merchantile/occupancies are: --------- CORRECT ANSWER-----------------500' Travel distance to toilet facilities in covered malls are: ---------CORRECT ANSWER-----------------300' Water closets, bidets or lavatories shall have a clearance from center of fixture to wall of: ---------CORRECT ANSWER-----------------15" The required clearance from front of fixture to a wall, door or other fixture is: ---------CORRECT ANSWER-----------------21" Minimum size floor drains for public laundries or central washing facilities is: ---------CORRECT ANSWER-----------------3" Shower waste outlets shall be minimum of: ---------CORRECT ANSWER---- -------------1 1/2"
Minimum size removable strainer for shower compartments are: --------- CORRECT ANSWER-----------------3" Minimum size floor drain strainer opening is: ---------CORRECT ANSWER-- ---------------.25 inches Sheet lead shall not weigh less than: ---------CORRECT ANSWER------------ -----4 pounds per square foot Sheet copper shall not weigh less than: ---------CORRECT ANSWER--------- --------12 ounces per square foot Urinals shall not be substituted for more than what percent of water closets? ---------CORRECT ANSWER-----------------67% Shower and Tub/Shower valves maximum hot water setting is: --------- CORRECT ANSWER-----------------120 degrees Maximum water temperature of a tankless heater or domestic hot water heater is: ---------CORRECT ANSWER-----------------140 degrees Maximum setting of a temperature pressure and relief valve or a combination thereof is: ---------CORRECT ANSWER----------------- 210 degrees 150 psi
Building sewers 8" and larger manholes must be installed every: --------- CORRECT ANSWER-----------------400' Each fixture trap shall have a trap seal of not less than: ---------CORRECT ANSWER-----------------2" Minimum number of roof drains in a building 10,000 square feet or less: ---- -----CORRECT ANSWER----------------- 2 Minimum number of roof drains in a building 10,000 square feet or more: --- ------CORRECT ANSWER----------------- 4 Minimum size of water service pipe: ---------CORRECT ANSWER-------------- ---3/4" A clinical sink has the following trap type ---------CORRECT ANSWER------- ----------Intergral Flushometer valves and tanks shall have: ---------CORRECT ANSWER------ -----------Vacuum Breakers Shower compartments shall not be less than ---------CORRECT ANSWER-- ---------------30 x 30
Commercial food waste grinder shall be connected to a minimum drain size of: ---------CORRECT ANSWER-----------------2 " Water heater pan size and drain size is: ---------CORRECT ANSWER-------- ---------1.5" deep with a 3/4" drain When rock is encountered in trenching rock will be removed to a minimum of: ---------CORRECT ANSWER-----------------3" below the installation level Hanger spacing for ABS pipe is: ---------CORRECT ANSWER----------------- 4' Water testing of a drainage system requires a: ---------CORRECT ANSWER-----------------10' head Sizing of storm drains for Rhode Island is based on: ---------CORRECT ANSWER-----------------2.6 inches of rain per hour The Board of Appeals consists of how many members? ---------CORRECT ANSWER----------------- 5 Tempered water is water having a temperature range of: ---------CORRECT ANSWER-----------------85 degrees to 110 degrees
Length (feet) = ---------CORRECT ANSWER-----------------Capacity / .0408 x diameter (feet) squared Capacity (gallons) = ---------CORRECT ANSWER-----------------.0408 x diameter (inches) squared x L (feet) Capacity (gallons) = ---------CORRECT ANSWER-----------------.0034 x diameter (inches) squared x L (inches) Waste from Commercial Dishwasher ---------CORRECT ANSWER------------ -----Air Gap Laundry Stand Pipe ---------CORRECT ANSWER----------------- 18 - 42" Min 2" Phenuematic Vent size for Sewage Pumps ---------CORRECT ANSWER---- ------------- 1 - 1/4" How many feet does a roof ledge or vertical wall add to roof area --------- CORRECT ANSWER-----------------1/2 of Roof Area How far does sanitary vent have to be from property line ---------CORRECT ANSWER-----------------10 Feet
Vent from window Can be How many feet from window horizontally and vertically ---------CORRECT ANSWER-----------------10' and 2' Testing With Air ---------CORRECT ANSWER-----------------5PSI 15 Mins What kind of backflow on irrigation setup ---------CORRECT ANSWER------- ----------atmospheric type vacuum breaker, a pressure type vacuum breaker or a reduced pressure principle back flow preventor. How many times to inspect back flows ---------CORRECT ANSWER---------- -------Yearly Testing Back flows Should Happen When ---------CORRECT ANSWER------ -----------Install, Repairs, and Annually Drainage Fixture Unit on Lav ---------CORRECT ANSWER----------------- 1 Drainage Fixture Unit on Res. Washer Machine & Bathub --------- CORRECT ANSWER----------------- 2 Drainage Fixture Unit on Res. Toilet ---------CORRECT ANSWER------------- ---- 4
You Vent a sink to prevent what? ---------CORRECT ANSWER----------------- Siphonage You need to pay the prevailing wage on state jobs when you are over what Amount? ---------CORRECT ANSWER-----------------$1, 4" Pipe 150 Feet Long, How many Gallons? ---------CORRECT ANSWER--- --------------230 Gallons A master plumber employs 3 master plumbers, and 6 journeyman. How many apprentices can he have. ---------CORRECT ANSWER----------------- 10 Maximum flow rate at a 60PSI Lavatory ---------CORRECT ANSWER--------- --------2.2GPM how much gallons of water in a cubic foot ---------CORRECT ANSWER------ -----------7. On a commercial Sewage ejector what is required? ---------CORRECT ANSWER-----------------B+C--Ball Valve/Check Valve What is defined as public work in RI? ---------CORRECT ANSWER------------ -----Any Renovation to a public Building.
