Hoja de Referencia del Examen · Referencia Rápida

Oklahoma Plumbing Journeyman and Natural Gas

Oklahoma  ·  PSI Services Contractor

Verificado, no estimado. Cada cifra a continuación proviene de la estructura oficial del examen que mantenemos: número de preguntas, puntaje de aprobación y ponderación de temas. Las preguntas de práctica están fundamentadas en la ley fuente con citas de estatutos. Omitimos cualquier cifra que no podamos verificar en lugar de adivinarla.
Total de preguntas
85
Puntaje de aprobación
75%
Tiempo del examen
180 min
Administrado por
PSI Services Contractor
Formato
Se permiten materiales de referencia

Porción Estatal de Oklahoma 85 preguntas

Conocimientos Generales de Plomería y Reglamentos 10 Q · 12%
IPC Chapter 1 scope, intent, and applicability of the plumbing codePermit requirements, application procedures, and exempt workCode official duties, inspection authority, and enforcement powersRequired plumbing system tests and inspection typesPipe length calculations using fitting allowances for threaded, copper, and PVC fittingsOffset and diagonal calculations using angle constants (45°, 60°, other angles)Volume, pressure, and capacity calculations for water systemsPipe material types, weights, and schedules (standard, copper, plastic, cast iron)Head PressurePipe JointsSolvent Welded Pipe JointsCalculations of Area and Volume +12 más
Tuberías, Válvulas y Válvulas de Control 8 Q · 9%
Pipe joints, fittings, and connection methods for gas and water pipingWater supply and distribution pipe materials, standards, and fittingsValves: types, required locations, and control valve functions (pressure-reducing, backflow preventers, relief valves)Pipe length calculations: fitting allowances, center-to-center and end-to-end measurementsPiping support, hangers, and spacing requirementsPVC Piping and ConnectionsCPVC Piping and ConnectionsGalvanized Piping and ConnectionsCopper Tubing and ConnectionsCopper Piping and ConnectionsPolyethylene Piping and ConnectionsPEX Piping and Connections +5 más
Accesorios y Equipos 8 Q · 9%
Minimum number and type of plumbing fixtures by occupancy classificationFixture installation requirements (spacing, clearances, and setting)Individual fixture standards and waste outlet requirements (water closets, lavatories, showers, bathtubs, sinks, urinals)Flushing devices, shower valves, and temperature-limiting controls for fixturesWater heater installation, safety devices, and relief valve requirementsTrap requirements, prohibited trap types, and trap seal protectionInterceptors and separators (grease, oil, sand) installation and sizingGas appliance installation requirements (cooking appliances, water heaters, room heaters, clothes dryers)Identify Minimum Plumbing Needs for Structures/FacilitiesInstall Fixtures and Associated Equipment
Suministro de Agua 10 Q · 12%
Backflow prevention devices, assemblies, and application requirementsWater distribution system design criteria including flow rates, pressures, and pipe sizingApproved piping materials, fittings, and joining methods for water service and distributionPotable water protection including cross-connection control and identification of nonpotable systemsValve requirements including full-open valves, shutoff valves, and pressure-reducing valvesWater pressure booster systems, water hammer arrestors, and thermal expansion controlHot water supply system requirements including temperature limits and recirculation systemsNonpotable water systems including graywater reuse and rainwater collection storage and distributionWater Supply and Distribution LinesProtection of Potable Water SupplyBackflow
Desagües y Alcantarillado 10 Q · 12%
Sanitary drainage pipe materials and standards (above-ground, underground, and building sewer)Drainage system sizing using fixture unit values and pipe sizing tablesSlope, installation, and fittings for horizontal drainage pipingCleanout requirements (location, spacing, size, and access)Sumps, ejectors, and below-grade drainage systemsBackwater valves and sewage backflow protectionStorm drainage system design and sizing (roof drains, conductors, leaders, and gutters)Indirect waste piping, air gaps, air breaks, and waste receptorsDrain and Sewer PipeBuilding SewersSewer and Drain CleanoutsSewage Ejectors and Sump Pumps +3 más
Ventilaciones 13 Q · 15%
Vent pipe sizing and developed length (IPC stack vents, vent stacks, individual/branch/circuit vents)Vent terminal location and termination requirements (roof extension height, clearances from openings, wall terminations)Venting methods and types (individual, common, wet, circuit, combination waste-and-vent, single-stack, island fixture)Air admittance valves (installation, location, size, prohibited installations, required outdoor vent)Vent connections and grades (dry vent rise, connection above drain centerline, grade back to drainage)Vent InstallationDeveloped Length
Trampas, Interceptores, Residuos Indirectos y Especiales 10 Q · 12%
Fixture trap requirements, dimensions, and prohibited trap typesTrap seal depth, protection methods, and primer devicesGrease interceptors and automatic grease removal devicesOil separators and sand interceptors for commercial applicationsIndirect waste piping requirements and air gap vs. air break distinctionsWaste receptors, standpipes, and hub drain installationSpecial waste neutralization for corrosive waste dischargeInterceptor and separator venting, access, and maintenance requirementsTrapsInterceptors and SeparatorsIndirect and Special Waste
Análisis Isométrico 7 Q · 8%
Calculating center-to-center (c-c) pipe lengths from isometric diagramsCalculating end-to-end (e-e) pipe lengths using fitting allowances45° offset constants (1.414 diagonal multiplier, 0.707 offset multiplier) applied to isometric layoutsThree-pipe offset diagrams with rise, run, and diagonal relationshipsFitting allowances for threaded, copper, PVC, and cast iron fittings in isometric assembliesSolving multi-fitting assemblies with wyes, tee-wyes, and elbows from isometric drawingsRolling offsets and true offset calculation using the Pythagorean theoremReading and interpreting offset terminology (offset, diagonal, rise, run, travel) from pipe diagramsIsometric Drawings
Gas Combustible 5 Q · 6%
Gas pipe sizing methods, tables, and equations (longest length, branch length, hybrid pressure)Approved piping materials and fittings (steel, copper, CSST, polyethylene, prohibited materials)Pressure requirements, allowable pressure drop, and maximum operating pressureVenting systems for fuel gas appliances (vent types, sizing, termination, connectors)Combustion air requirements for gas appliances (indoor, outdoor, mechanical methods)Appliance installation requirements (location, clearances, access, prohibited locations)Pipe testing, purging, identification, and leak checkingPipe length calculations and fitting allowances for fuel gas pipingGas Distribution Pipe SizingGas Pressure RegulatorsHangers and SupportsDirection Changes +14 más
Seguridad 4 Q · 5%
Fall protection trigger heights and duty to provide fall protection (6-foot rule, specific work conditions)Personal fall arrest system components, specifications, and proper useGuardrail system requirements and specificationsLadder safety requirements, proper use, and inspectionPersonal protective equipment selection, provision, and maintenance (head, eye, face, foot, hearing protection)Safety net systems installation and inspection requirementsStairway construction requirements and stairrail/handrail specificationsFall protection training, certification, and retraining requirementsResponsibility for Providing Personal Protective EquipmentExcavation SafetyEmployee Protection in Trenches and ExcavationsSafety Training Requirements +13 más

Distinciones Clave

Air Gap (indirect waste)vsAir Break (indirect waste)

An air gap is measured between the indirect waste pipe and the flood level rim of the waste receptor, while an air break is provided between the indirect waste pipe and the trap seal of the waste receptor — a lower and less stringent separation.

Chapter 8 Indirect Special Waste, Section 802.1.1
Food Storage/Preparation Equipment (indirect waste)vsCommercial Dishwashers / Food Utensil Sinks (indirect waste)

Food storage and preparation equipment requires an air gap specifically, whereas commercial dishwashing machines and food utensil sinks may use either an air gap or an air break.

Chapter 8 Indirect Special Waste, Section 802.1.1
No-Hub Cast Iron Fitting AllowancevsThreaded Pipe Fitting Allowance

No-Hub cast iron deducts only the D dimension (center-to-face) with no thread-in deduction because pipe connects via clamp, while threaded pipe deducts center-to-face minus thread-in for each fitting.

Mathematics for Plumbers and Pipefitters, Pages 107-108 (Unit 28, Cast Iron Assemblies with Various Bends, Sample Problem 1)
Copper / PVC Fitting AllowancevsThreaded Fitting Allowance

Copper and PVC fitting allowance is center-to-face minus depth of socket/cup only, whereas threaded fitting allowance is center-to-face minus thread-in depth, requiring an additional subtraction step.

Mathematics for Plumbers and Pipefitters, Page 44
45° Offset Constant (diagonal from offset)vs45° Offset Constant (offset from diagonal)

Multiply the offset by 1.414 to find the diagonal; multiply the diagonal by 0.707 to find the offset — these constants are reciprocals of each other.

Mathematics for Plumbers and Pipefitters, Pages 67-68
60° Offset: Cosecant (diagonal)vs60° Offset: Cotangent (run)

To find the diagonal of a 60° offset multiply the offset by the cosecant (1.1547); to find the run multiply the offset by the cotangent (0.5774).

Mathematics for Plumbers and Pipefitters, Pages 95-96
Urinal Substitution Limit — Assembly/Educational OccupanciesvsUrinal Substitution Limit — All Other Occupancies

In assembly and educational occupancies urinals may replace up to 67% of required water closets, while in all other occupancies the limit is 50%.

IPC 2018, Section 424.2
Elongated Water Closet BowlvsStandard Water Closet Bowl

Elongated bowls are required in public or employee toilet facilities; standard (round) bowls are not permitted in those locations under IPC Section 425.2.

IPC 2018, Section 425.2
Temperature Relief Valve LocationvsVacuum Relief Valve Requirement

A temperature relief valve must be located to be actuated by water in the top 6 inches of the tank, while a vacuum relief valve is specifically required only for bottom-fed water heaters and tanks.

IPC 2018, Section 504.4.1
Fixture Trap Liquid Seal — MinimumvsFixture Trap Liquid Seal — Maximum

Each fixture trap must have a liquid seal of not less than 2 inches and not more than 4 inches (deeper only for special accessible-fixture designs).

IPC 2018, Section 1002.4
Floor Drain Minimum Outlet — StandardvsFloor Drain Minimum Outlet — Coin-Op Laundry

Standard floor drains require a minimum 2-inch outlet diameter, while floor drains in public coin-operated laundries and central washing facilities require a minimum 3-inch outlet diameter.

IPC 2018, Section 413.3
Single-Occupancy Fixture Fraction RoundingvsMultiple-Occupancy Fixture Fraction Rounding

For a single occupancy each fractional fixture number is rounded up individually, whereas for multiple occupancies the fractions for each occupancy are summed first and then rounded up once to the next whole number.

IPC 2018, Section 403.1.1

Términos Clave

Minimum Clearance in Front of Fixtures IPC 2018, Section 405.3.1
IPC Section 405.3.1 requires not less than 21 inches of clearance in front of a water closet, urinal, lavatory, or bidet to any wall, fixture, or door.
Shower/Tub Maximum Temperature Limit IPC 2018, Section 412.3
IPC Section 412.3 requires shower and tub-shower combination valves to limit the maximum setting to 120°F, field-adjusted per manufacturer's instructions.
Maximum Travel Distance to Toilet Facilities IPC 2018, Section 403.3.3
IPC Section 403.3.3 limits the path of travel to required public and employee toilet facilities to not more than 500 feet and not more than one story above or below the space served.
Separate Facilities Not Required — Small Occupancy IPC 2018, Section 403.2 Exception 2
IPC Section 403.2 Exception 2 exempts structures or tenant spaces with a total occupant load of 15 or fewer (employees and customers combined) from requiring separate male and female toilet facilities.
Business Occupancy Separate Facilities Threshold IPC 2018, Section 403.2
IPC Section 403.2 Exception 4 does not require separate facilities in business occupancies where the maximum occupant load is 25 or fewer.
Toilet Room Separation from Food Preparation IPC 2018, Section 403.3.2
IPC Section 403.3.2 prohibits toilet rooms from opening directly into a room used for the preparation of food for service to the public.
Pay Toilet Facility Rule IPC 2018, Section 403.3.5
IPC Section 403.3.5 requires that pay toilet facilities be installed in excess of the required minimum facilities, and that all required facilities remain free of charge.
Attic Water Heater Passageway — Solid Flooring Width IPC 2018, Section 502.3
IPC Section 502.3 requires continuous solid flooring not less than 24 inches wide along the passageway to a water heater installed in an attic, with the passageway not exceeding 20 feet in length.
Prohibited Water Heater Locations IPC 2018, Section 502.2
IPC Section 502.2 prohibits solid-, liquid-, or gas-fuel water heaters from being installed in a room containing air-handling machinery where that room is used as a plenum.
Relief Valve Discharge Pipe Termination Height IPC 2018, Section 504.6
IPC Section 504.6 requires the relief valve discharge pipe to terminate not more than 6 inches above and not less than two times the discharge pipe diameter above the floor or flood level rim of the waste receptor.
Shower Compartment Minimum Area IPC 2018, Section 421.4
IPC Section 421.4 requires shower compartments to have an interior cross-sectional area of not less than 900 square inches with a minimum dimension of 30 inches.
Bidet Maximum Water Temperature IPC 2018, Section 408.3
IPC Section 408.3 limits the discharge water temperature from a bidet fitting to not greater than 110°F by means of a water-temperature-limiting device.
Fitting Allowance (Threaded Pipe) Mathematics for Plumbers and Pipefitters, Pages 40-41
The deduction from center-to-center measurement to obtain end-to-end pipe length; for each threaded fitting it equals the center-to-face dimension minus the thread-in depth.
True Offset (Rolling Offset) Mathematics for Plumbers and Pipefitters, Page 146
The single combined dimension used with angle constants in a rolling offset, calculated as the square root of the sum of the horizontal offset squared and the vertical rise squared.
Grease Interceptor as Fixture Trap — Max Waste Pipe Length IPC 2018, Section 1002.1 Exception 3
IPC Section 1002.1 Exception 3 permits a grease interceptor to serve as a fixture trap for a combination sink of not more than three compartments when the developed length of waste pipe from the most upstream outlet to the interceptor inlet does not exceed 60 inches.
Parallel 45° Offset Length Difference Constant Mathematics for Plumbers and Pipefitters, Page 138
For parallel 45° offset pipe assemblies the difference in length between parallel runs equals 0.414 times the spread distance between the assemblies.

Fórmulas que Debes Saber

End-to-End Length (Threaded Pipe)e-e = c-c − Σ(center-to-face − thread-in) for each fitting
Fitting Allowance — Single Threaded FittingFitting allowance = A (center-to-face) − B (thread-in)
Fitting Allowance — Copper / PVC FittingFitting allowance = center-to-face − depth of solder cup (or socket)
45° Offset — Diagonal from OffsetDiagonal = offset × 1.414
45° Offset — Offset from DiagonalOffset = diagonal × 0.707
45° Offset — RunRun = offset (run equals offset for 45°)
60° Offset — Diagonal from OffsetDiagonal = offset × 1.1547 (cosecant of 60°)
60° Offset — Run from OffsetRun = offset × 0.5774 (cotangent of 60°)
Rolling Offset — True OffsetTrue offset = √(horizontal offset² + vertical rise²)
Parallel 45° Offset — Difference in Pipe LengthLength difference = spread × 0.414
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