Questions and Answers
A trap that serves a single shower stall that is equipped with a hand shower, a rain head, and a standard shower head shall be no less than ________ in minimum diameter.
2 inches
The installation of traps at the floor drain locations which are found susceptible to freezing temperatures may be __________.
eliminated
Vacuum breakers shall be installed with the critical level at least _____-inches above the flood level rim of the fixture they serve.
6 inches
No plumbing permit shall be issued for cross connection installations that require ______________ until the application for a permit is accompanied by a letter of approval.
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The waste discharge from safe waste pans serving water heaters or hot water storage tanks where there is _______ below shall be piped indirectly to a properly trapped and vented fixture.
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CPVC (Chlorinated Polyvinyl Chloride) pipe and fittings may be used provided that none of this material is located within ____-inches of any connection to a hot water tank.
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A ________-vent is a branch vent that serves two or more floor-outlet fixtures that are battery wasted.
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Match the following pressure terms:
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The boiler requires a minimum of _____-cu.ft. of air to support proper combustion.
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The code would require the gas vent penetrating the roof to be not less than ______ above any portion of a building within 10-feet horizontally.
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In Massachusetts copper tubing and fittings may be used for natural gas piping ___ if the gas contains no more than .03 grains of hydrogen sulfide per 100 cu.ft.
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The maximum allowable amount of 6-inch single wall metal vent connector material that may be installed horizontally is _____ feet.
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A clearance of _____ from combustibles shall be maintained when using/installing type-B vent materials.
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A one-inch diameter copper water service is entering an existing building and connects to a water meter. A gauge placed at or near a hose connection located on a floor level that is 28-feet below this point would most likely indicate a p.s.i.g. of __________.
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For an offset, what is the slanted portion of the pipe called?
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For an offset, what is the height of the slanted portion called?
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Assume that the fitting make-in for each 45-degree elbow is known to be one-inch, the pipe length that is to be cut for the travel pipe [A] is ______.
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What answer below shall be considered most correct when joining and fastening ABS or PVC pipe to a fitting with solvent cement, immediately insert the pipe to the full socket depth while rotating the pipe into the fitting ____ -turn to insure even distribution of solvent cement.
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A journeyman plumber and apprentice shall perform the inspection within two working days. Proper notification shall mean that the licensee-permit holder has had ______ communication with the Inspector.
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The reference term, ________ is the pressure in a water supply pipe measured at the faucet when the outlet is wide open.
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Where vent pipes connect to a horizontal soil or waste pipe, __________.
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The letter _____ represents a code regulation statement that is considered-[FALSE]
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A gas appliance shall not be installed in a chimney that is serving any other appliances using _____ as solid fuel(s).
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175-feet of 1-inch schedule 40 steel gas piping shall be pitched at no less than _______ to prevent traps.
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The unthreaded portion of any size schedule-40 steel gas piping that penetrates a wall shall be no less than ______.
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A _________ is a fitting-connection method that shall NOT be used or installed when concealed or inaccessible in a gas piping.
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The developed-length of the 1-inch vent serving the pressure regulator may not exceed _________.
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Natural or propane gas that is delivered through a piping system at-1-½ P.S.I. is equal to _____ inches of water column.
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Propane is transported, stored and handled primarily in a _________ form.
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Natural gas ______ than Undiluted liquefied petroleum-(LP)-propane gas.
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The boiler is consuming approximately, __________ BTUs per hour.
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The journeyman plumber/gas-fitter is responsible to determine that this gas equipment has been placed or set on its curb at least ______ from the roof's edge.
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"Category I" gas appliances and equipment are typically equipped with ___________.
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When filled with water for the purpose of a rough underground plumbing inspection the capacity in gallons of the branch will be approximately ________.
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A gauge placed in a plug at the base of the stack would indicate a p.s.i.g. of ______.
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The code states that a _________ is a permanently installed mechanical device for removing sewage or liquid waste from a sump.
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The code requires that the backfill shall be brought up evenly on both sides of the pipe so that it retains proper _________.
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The symbol identified at box-[E] in-[FIGURE-TP-B-Q1-3A: CONSTRUCTION PLAN KNOWLEDGE] is typically used to define the _______ on a blueprint.
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A non-apprentice licensee or the ______ shall establish that the work will stand the prescribed test.
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When smoke is used and the entire DWV-system is charged with smoke, air pressure that is equal to __________ shall be applied.
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Cleanouts on concealed piping shall be extended through and terminate flush with the finished wall or floor; or _________ may be left in the wall or floor.
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In sanitary or storm drainage systems, a line of pipe in reference to a horizontal plane is usually expressed as the _____ in a fraction of an inch per foot length of pipe.
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No more than ______ fixture units are allowed on a 3-inch soil or waste stack.
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A _________ is responsible for applying for and securing plumbing permits in a Plumbing Corporation.
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When performing a test of the DWV-system in compliance with the code, air pressure that is equal to __________ shall be applied.
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The free-area of a basement measures 42-feet by 28-feet. The free-basement space available will support proper and adequate combustion of _______ -cubic feet of gas.
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When combustion air is provided by an engineered mechanical air supply system, the combustion air shall be supplied from outdoors at the minimum rate of _________ for all appliances located within the space.
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What is the "propane" gas code adopted by the Commonwealth of Massachusetts with amendments?
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A natural gas piping system and an undiluted liquefied petroleum gas piping system installed within the same building is identified with ________.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: The minimum required area and dimension of the shower stall shall be measured from its finished interior dimension at a height equal to the top of the threshold and at a point ______ to the centerline of the threshold.
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If not part of the booster, the equipment served by the booster shall be equipped with a manual reset ________ gas pressure switch.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: No machine for manufacturing ice, or any device used for the handling or storage of ice shall be located in a _______.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: The image presented in-[FIGURE-TP-B-Q1-4B: VACUUM DRAINAGE SYSTEM KNOWLEDGE] IS known as a _______ and represents a method of assembling pipe and fittings in a manner to re-establish a waste slug.
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The sleeve used for CSST shall extend a minimum of _____ inches from the top of the finished floor.
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What answer below shall be considered most correct to complete the following 'Massachusetts General Law, Chapter 142' related statement: They shall grant a credit of ______ %-percent to the examination standing of each applicant who is a veteran.
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All installations of fuel gas utilization equipment not governed by NFPA 85 or 86 having inputs over _____________ per combustion chamber shall be governed by 248 CMR 7.00.
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Labels must be placed every ______ for exhaust and intake piping that is to be concealed.
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A journeyman plumber who is operating a plumbing company is permitted to hire no more than one apprentice as a helper.
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What answer below shall be considered most correct to complete the following 'Mass. General Law, Chapter 142' related statement: It is the journeyman plumbers responsibility to confirm that the heat sensitive member of the temperature relief valve be no more than _____-inches away from the top of the tank.
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Gas shut-off valves installed within the gas piping system shall be no more than ______ away when used to turn-off or service gas appliances.
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According to OSHA regulations, when employees are required to be in trench excavations that are 4-feet deep or more, adequate means of exit must be within ____- feet of lateral travel.
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Seven-times the cross-sectional area of a 3"-diameter vent connector is _______ sq.in.
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A hose connected to the mop receptor faucet running for one hour will potentially discharge _____-gallons of water.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Underground gas piping systems shall be installed with a minimum of 12" of cover, if external damage to the pipe or tubing from external forces is likely to result the minimum cover shall be increased to _____.
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The code would require the storm conductor identified at point-[D] to be a minimum size of _____-inch.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: The Board of Examiners of Plumbers and Gas-fitters does NOT adopt Chapter(s) ______ of NFPA-58 the 2011 Edition of the National Liquefied Petroleum Gas Code published by the National Fire Protection.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Two safety shutoff valves, in series, when the maximum firing rate per combustion chamber exceeds __________ -BTU/hr.
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The code would require the roof-drain identified at point-[F] to be a minimum size of ____-inch.
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The code would require the storm conductor identified at point-[H] to be a minimum size of _______.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: The future tee branch on the gas-main is not being used and is terminated with a ____ plug.
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Match the following plumbing components with their definitions:
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The pipe or duct that connects a fuel gas-burning appliance to a vent or chimney is a __________.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Where the louver and grille design and free area are not known, it shall be assumed that metal louvers and grilles have _______ free area.
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Basic Principle # _____ states that trap seals shall be protected from various dangers.
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The entire vacuum drainage piping system shall be pressurized to not less than _____-p.s.i.g and shall show no loss in gauge pressure for at least ten minutes.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Where piping containing gas is to be removed, the line first shall be disconnected from all sources of gas and then thoroughly ________.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Manually operated main shutoff and pilot shutoff valves in sizes larger than ____-inches or for pressures greater than ½ p.s.i.g shall be of the lubricated plug or ball type with stops.
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When testing the rough plumbing connections of the drainage, waste and vent system of a building with smoke _________
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What answer below shall be considered most nearly correct to complete the following 'Plumbing math knowledge' related statement: The length -(height) of the hot water tank is approximately ______ feet.
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What answer below shall be considered most nearly correct to complete the following 'Plumbing math knowledge' related statement: The diameter of the electric hot water heater is approximately ____-inches.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: ________ is required to install a 'bonding jumper'.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: Natural and mechanical draft systems that maintain a continuously burning pilot(s) capable of igniting any gas flowing from the main burner shall, upon demand for heat prove all _________.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: _______is the chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form of either a glow or flame.
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What answer below shall be considered most correct to complete the following 'Gas code knowledge' related statement: The code will permit a maximum of ______ BTU/hr.to be conveyed through this pipe.
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What answer below shall be considered most correct to complete the following 'General code knowledge' related statement: Certificates of Completion documentation must be retained by the licensee for no less than ______ renewal cycles.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: Upon completion of a section or of the entire water distribution system, it shall be tested and proved tight under a pressure not less than _____________.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: The code requires pH adjustment tanks to be equipped with a sensor that must detect the pH of the tank contents, within a range of __________.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: A frost closure condition is more likely to occur in that portion of the drainage-waste and vent-system defined as the _______.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: Roof drain strainers for use on parking decks may be of the flat surface type, level with the deck and shall have an available inlet area not less than ______ times the area of the conductor to which the drain is connected.
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What answer below shall be considered most correct to complete the following 'General plumbing code knowledge' related statement: The color that is used to identify type-k copper tubing is _________.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: Bedpan washers being installed at this facility shall be vented to the outer atmosphere above the roof by means of one or more _______ vents.
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What answer below shall be considered most correct to complete the following 'Plumbing code knowledge' related statement: The journeyman plumber is responsible to use sand or other fine granular material, compact and backfill around the entire pipe to a point at least ______-inches over the crown of the pipe.
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Study Notes
Plumbing Code Knowledge
- A trap for a shower stall with multiple shower heads must have a minimum diameter of 2 inches.
- Traps at floor drains in freezing conditions may be eliminated.
- Vacuum breakers for fixtures must be installed 6 inches above the flood level rim.
- Cross connection installations require a reduced pressure backflow preventer (RPBP) letter of approval before a plumbing permit can be issued.
- Waste discharge from safe waste pans must be indirectly piped if there is occupancy below.
Material and Installation Regulations
- CPVC pipe must not be within 24 inches of a hot water tank connection.
- A loop vent serves multiple fixtures and connects to a vent stack adjacent to the horizontal branch.
- Hangers for 1-½-inch copper tubing should be placed no more than 10 feet apart.
- Type-B vent materials require a clearance of 1 inch from combustibles.
Performance and Measurement
- A gas boiler requires 2,400 cubic feet of air for combustion.
- The static pressure at a faucet is measured when fully open and flowing, referred to as residual pressure.
- The developed length of vent serving a gas regulator must not exceed 100 feet.
Gas-Related Code Knowledge
- Natural gas at 1-½ PSIG equals 42 inches of water column.
- Propane is primarily handled in liquefied form and is lighter than natural gas.
- The gas equipment must be set at least 6 feet from the roof's edge.
Plumbing Calculations
- For a beauty salon holding tank operating at ⅞-full, it would contain approximately 6,613-6,617 gallons.
- A 1-inch diameter copper water service to an existing building must pipe through a pressure gauge indicating 80 to 81 PSI.
- A 3-inch cast iron branch drain will have a capacity of approximately 15 to 17 gallons when filled with water for inspection.
Components and Specifics
- Draft hoods are standard features for "Category I" gas appliances.
- Union connections are not permitted for concealed gas piping.
- A maximum of 36 feet of horizontal vent connector is allowed for gas appliances connected to a chimney.
Notification and Regulation
- A direct communication is required between the plumber and inspector for inspection notifications.
- Proper notification for inspections requires advance notice and compliance with code regulations.
Miscellaneous
- The slanted portion of a pipe in an offset is referred to as the run, while its height is known as the rise.
- Each gas vent must be taken off above the center line of the soil or waste pipe to ensure proper operation.
Final Definitions
- A permanently installed mechanical device for removing sewage or liquid waste from a sump is referred to as a sump pump.### Sump Pump and Related Terms
- Sump Pump: A device used to remove accumulated water from a sump basin, typically found in the basement of homes.
- Ejector: A pump used to remove sewage or wastewater from a bathroom or basement to a sewer line.
- Sewage Pump: Designed to pump sewage and waste materials from lower to higher elevations.
- Sump: A pit or depression that collects water and debris, often requiring removal through a sump pump.
Plumbing Code Knowledge and Requirements
- Backfill must be even on both sides of piping to retain support.
- The symbol on blueprints often indicates a storm drain below grade.
- The permit holder must ensure plumbing work withstands prescribed tests before notify inspections.
- A smoke test requires an air pressure of 1 inch water column in the DWV system.
- Concealed piping cleanouts must terminate flush or use pits or chases for access.
- In drainage systems, a line is expressed in terms of its fall in inches per foot.
- A maximum of 48 fixture units is allowed on a 3-inch soil or waste stack.
General Provisions and Conduct
- A Master plumber who is an officer of the corporation is responsible for securing plumbing permits.
- The maximum vertical pipe length for discharges in a vacuum system is 20 feet.
- Only one end of tracer wire must be above ground at a building wall or riser.
Gas Code Knowledge
- The free basement space must support proper combustion of 176 cubic feet of gas.
- Combustion air supplied mechanically must be 0.35 ft³ per 1000 BTU/hr.
- The propane gas code is NFPA-58.
- Natural gas and liquefied petroleum gas systems within the same structure are marked with green and yellow labels.
- Low-pressure gas systems require a manual reset low gas pressure switch and a check valve.
- 6 inches is the minimum sleeve extension for CSST through metal or concrete decks.
- Installations over 400,000 BTU/hr must comply with specific regulations under 248 CMR 7.00.
Plumbing Calculations and Sizes
- Exhaust and intake piping labels should be placed every 3 feet for concealed piping.
- Gas shut-off valves must be within 6 feet for servicing.
- The cross-sectional area equivalent for a 3-inch vent connector is 49.5 sq. in..
- A hose connected to a mop receptor can discharge 450 gallons over one hour.
Storm Drain Sizing
- Minimum size for various storm drainage system components varies, with some requiring at least 6 inches or 3 inches based on slope and application.
Massachusetts General Law and Compliance
- Basic Principle #9 protects trap seals from various conditions.
- A vacuum sanitary drainage system must be tested to 15-p.s.i.g without pressure loss.
- For shower stalls, dimensions are measured tangent to the centerline of the threshold.
- No ice machines are allowed in soiled utility rooms.
- The Reforming pocket assists in the assembly of vacuum drainage systems.
Examination and Apprenticeship Regulations
- Veterans receive a 5% credit on examination standing.
- A journeyman plumber can hire more than one apprentice; statement is false.
- The temperature relief valve must be 5 inches away from the top of the tank.
- OSHA mandates safe egress from trench excavations within 25 feet of lateral travel when deeper than 4 feet.### Gas Code Regulations
- Underground gas piping systems require a minimum of 12 inches of cover; if external damage is possible, increase cover to 18 inches (1 foot 6 inches).
- The Board of Examiners of Plumbers and Gas-fitters in Massachusetts modifies NFPA-58 codes; Chapters 4 and 7 are not adopted.
- For gas utilization equipment with a maximum firing rate exceeding 5 million BTU/hr, two safety shutoff valves in series are required, one with a valve seal overtravel interlock.
- A future tee branch on the gas main, if not used, must terminate with a 1 inch plug.
- The connection from a gas-burning appliance to a vent is termed a vent connector.
Ventilation and Air Requirements
- Where louver and grille designs and free areas are unknown, assume 75 percent free area for metal types.
- Natural draft systems must prove all interlocks upon demand for heat.
Safe Practices in Gas Systems
- Pipelines with gas to be removed must first be disconnected and thoroughly purged.
- Main shutoff and pilot shutoff valves exceeding 2 inches or for pressures above ½ p.s.i.g should be lubricated plug or ball type with stops.
Plumbing Math and Specifications
- The approximate height of a 50-gallon hot water tank with a 16-inch diameter is 5 feet.
- A 75-gallon round electric water heater has an approximate diameter of 17½ to 18½ inches.
- For a 5-inch B-vent, a maximum of 206,000 BTU/hr can be conveyed through the existing vent.
Continuing Education and Compliance
- All licensed plumbers and gas fitters must retain Certificates of Completion for a minimum of 3 renewal cycles.
Plumbing System Testing and Regulations
- A water distribution system must be tested at a pressure no less than 125 psig.
- pH adjustment tanks must include a sensor detecting pH within a range of 2 to 12 (alkaline) for waste effluent regulation.
- Frost closure is most likely to affect the stack vent in drainage systems.
Installation Guidelines
- Roof drain strainers on parking decks require an inlet area of at least 2 times the connected conductor's area.
- Green is the color used to identify type-k copper tubing.
- Bedpan washers in hospitals must have local vents venting to the outer atmosphere.
Backfill Requirements
- When installing schedule-40 PVC piping below grade level, backfill should be at least 6 inches above the pipe crown to ensure protection.
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Test your knowledge with these flashcards designed for plumbing certification exams. Focus on plumbing codes, installation, and the requirements for DWV systems and water distribution. Ideal for journeyman plumbers and apprentices.
