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
100
Puntaje de aprobación
75%
Tiempo del examen
240 min
Administrado por
PSI Services Contractor
Formato
Se permiten materiales de referencia
Porción Estatal de Idaho
100 preguntas
2017 Idaho State Plumbing Code Capítulo 21 Q · 1%
Drainage system terminology (building drain, building sewer, soil pipe, waste pipe, stack, branch, horizontal branch)Water supply and distribution terminology (building supply, water distribution pipe, riser, fixture branch, fixture supply, remote outlet)Backflow and cross-connection terminology (backflow, backsiphonage, backpressure backflow, cross-connection, critical level, air gap)Vent system terminology (dry vent, wet vent, continuous vent, stack vent, vent stack, branch vent, individual vent, relief vent, yoke vent)Trap and trap-related terminology (trap, trap seal, trap arm, trap primer, crown weir, top dip)Grease interceptor and special waste terminology (gravity grease interceptor, hydromechanical grease interceptor, FOG disposal system, grease removal device, interceptor/clarifier)Gray water and alternate water source terminology (gray water, reclaimed water, rainwater catchment system, on-site treated nonpotable water, mulch basin, surge tank)Pipe joint and connection type terminology (brazed joint, soldered joint, welded joint, flanged joint, flared joint, compression joint, heat-fusion weld joint, pressed fitting, push fit fitting)
2017 Idaho State Plumbing Code Capítulo 55 Q · 5%
Permits and inspections for water heater installationWater heater location requirements (bedrooms, bathrooms, garages, attics)Temperature, pressure, and vacuum relief devices (TPR valves)Combustion air requirements (indoor, outdoor, mechanical, and combined methods)Venting system types and selection (Type B, Type L, single-wall metal pipe, direct-vent)Vent and chimney termination requirementsSizing of Category I venting systems using code tablesSeismic strapping, drainage pans, and physical installation requirements
2017 Idaho State Plumbing Code Capítulo 65 Q · 5%
Cross-connection control and backflow prevention devices (air gap, AVB, PVB, SVB, DC, RP assemblies)Potable and nonpotable water system identification and labeling requirementsApproved pipe and fitting materials for water supply and distribution systemsJoining methods for water supply piping (soldered, brazed, flared, mechanical, solvent cement, heat-fusion)Water pressure regulation, pressure relief valves, and expansion tanksValve requirements and shutoff valve placement in water distribution systemsWater supply system sizing using fixture units and Table 610.4Residential fire sprinkler system installation, piping, and sizing requirements
2017 Idaho State Plumbing Code Capítulo 72 Q · 2%
Drainage fixture unit (DFU) values and trap sizing by fixture typeSizing of drainage piping using maximum fixture unit loading and pipe length tablesApproved drainage piping materials and permitted locations (underground, aboveground, building sewer)Joints and connection methods by pipe material (ABS, PVC, cast-iron, copper, stainless steel, vitrified clay)Cleanout requirements: location, spacing, clearance, and accessGrade and slope requirements for horizontal drainage piping and building sewersDrainage of below-grade fixtures: backwater valves, sewage ejectors, sumps, and alarmsBuilding sewer requirements: materials, sizing, separation from water pipes, and testing
2017 Idaho State Plumbing Code Capítulo 85 Q · 5%
Air gap and air break requirements for indirect waste connectionsIndirect waste piping sizing, length limits, and trapping requirementsIndirect waste receptors — standpipe dimensions, placement restrictions, and approval requirementsFood and beverage establishment indirect waste requirements (equipment types, pipe sizes, air gap mandates)Condensate waste disposal, pipe sizing, overflow protection, and point of dischargeChemical and industrial waste pretreatment, approved pipe materials, and venting restrictionsSteam and high-temperature discharge condensers, sumps, and blowoff pipe sizingClear water wastes, swimming pool drainage, cooling water, and pressure drainage connections
2017 Idaho State Plumbing Code Capítulo 95 Q · 5%
Trap seal protection and siphonage/backpressure preventionVent pipe sizing based on fixture units and developed lengthVent pipe grades, connections, and rise requirementsVent termination requirements including roof clearance, frost/snow closure, and sidewall venting (Idaho-specific)Wet venting — vertical and horizontal bathroom group configurationsSpecial venting for island fixtures and air admittance valve (AAV) limitations (Idaho-specific)Circuit venting requirements and relief ventsCombination waste and vent systems — permitted conditions, sizing, and restrictions
2017 Idaho State Plumbing Code Capítulo 103 Q · 3%
Trap requirements and where required (fixture trapping rules, tailpiece length, shared traps)Prohibited trap types (S-traps, bell traps, crown-vented traps, movable-part devices)Trap seal depth requirements (minimum and maximum liquid seal dimensions)Trap arm horizontal length limits and vent placement (Table 1002.2)Floor drain traps and trap seal protection (backwater valves, trap seal primers)Building traps (installation conditions, cleanouts, relieving vents)Grease interceptor requirements (hydromechanical vs. gravity types, sizing, maintenance, prohibited connections)Sand and oil/flammable liquid interceptor requirements (design, sizing, venting, special occupancy applications)
2017 Idaho State Plumbing Code Capítulo 112 Q · 2%
Approved materials for storm drainage conductors, leaders, and underground pipingPrimary and secondary roof drainage system requirementsSizing of roof drains, vertical conductors, and leaders using rainfall tablesSizing of horizontal storm drains and sewers by projected roof and paved areaSubsoil drain installation, discharge, and sump requirementsControlled-flow roof drainage system design and conditionsTraps on storm drains and leaders connected to combined sewersTesting methods for storm drainage systems (water test and air test)
2017 Idaho State Plumbing Code Capítulo 124 Q · 4%
Acceptable piping materials and joining methods (metallic pipe, tubing, plastic, CSST)Gas piping system sizing methods (longest length, branch length, hybrid pressure) and sizing tablesUnderground and aboveground gas piping installation requirementsGas pressure regulators: installation, venting, and overpressure protectionPressure testing and inspection procedures (test medium, test pressure, duration, leak detection)Appliance connections, shutoff valves, sediment traps, and flexible connectorsElectrical bonding and grounding requirements for gas piping systemsPurging requirements for gas piping systems
Dimensionamiento de Plomería Usando Esquemas Proporcionados Durante el Examen8 Q · 8%
Water supply fixture units (WSFU) and minimum fixture branch pipe sizes using Table 610.3Sizing water supply pipe and meter using Table 610.4 (pressure ranges, developed length, fixture unit totals)Drainage fixture unit (DFU) values and minimum trap/trap arm sizes using Table 702.1Maximum unit loading and maximum length of drainage and vent piping using Table 703.2Sizing vent piping based on fixture units and developed lengthSizing storm water drainage systems using rainfall rates and projected roof/paved areas (Tables 1101.8 and 1101.12)Flushometer valve fixture unit assignments for water supply sizing using Table 610.10Available pressure calculations for water supply sizing (elevation adjustments, pressure loss, developed length)
Manual de Referencia de Negocios y Leyes para Contratistas Sección 11 Q · 1%
Purpose and components of a business planExecutive summary preparationManagement plan developmentMarketing plan elementsOperations plan considerationsFinancial plan and projected financial statementsSupporting documents assemblyBusiness research resources and tools
Manual de Referencia de Negocios y Leyes para Contratistas Sección 21 Q · 1%
Selecting and working with a CPA or LPAAccountant fee structures and engagement lettersSelecting a business attorneyAttorney fee arrangements and referral servicesSelecting an insurance agent for contractor businessesKey questions when evaluating insurance coverage needsSelecting a bank for business needsComparing banking products, loan programs, and financial services
Manual de Referencia de Negocios y Leyes para Contratistas Sección 31 Q · 1%
Sole proprietorship characteristics and owner liabilityGeneral partnership structure and assumed business name filing requirementsLimited liability partnership (LLP) formation and partner liability protectionsLimited partnership (LP) general vs. limited partner roles and filing requirementsLimited liability company (LLC) formation, naming rules, and registration with Idaho Secretary of StateCorporation types: S Corp, C Corp, and professional service corporation distinctionsForeign business entity registration requirements in IdahoSecurities regulations and Idaho Department of Finance notification requirements
Manual de Referencia de Negocios y Leyes para Contratistas Sección 41 Q · 1%
DOPL mission and regulatory oversight roleSeven regulatory boards under DOPLLicensing requirements by trade category in IdahoPenalties for unlicensed workLicense qualification requirements and application processNon-refundable fees and supporting documentationDOPL contact information and application resources
Manual de Referencia de Negocios y Leyes para Contratistas Sección 51 Q · 1%
Bookkeeping process and financial recordkeeping (journals, general ledger, trial balance)Financial statements (balance sheet, income statement, cash flow statement)Cash vs. accrual accounting methodsProject accounting methods (completed contract and percentage of completion)Financial ratios (liquidity, efficiency, leverage, and profitability ratios)Cash flow management and cash flow analysisEquipment depreciation methods (straight-line, MACRS, Section 179 deduction)Equipment acquisition options (leasing, renting, and purchasing)
Manual de Referencia de Negocios y Leyes para Contratistas Sección 620 Q · 20%
Federal anti-discrimination laws (ADEA, ADA, Title VII, EPA, GINA, Pregnancy Discrimination Act)Reasonable accommodation and undue hardship under ADA and Title VIIWage and hour requirements under the Fair Labor Standards Act (FLSA)Family and Medical Leave Act (FMLA) eligibility and leave entitlementsFederal contractor labor law requirements (Davis-Bacon, Service Contract Act, Walsh-Healey, Copeland Anti-Kickback)Idaho-specific employment laws (minimum wage, wage payment, child labor, new hire reporting, recordkeeping)Required workplace poster obligations for employersEmployee Polygraph Protection Act and Consumer Credit Protection Act wage garnishment rules
Manual de Referencia de Negocios y Leyes para Contratistas Sección 715 Q · 15%
Types of contractor insurance coverage (automobile, builder's risk, CGL, completed operations, pollution liability, EPLI, professional liability, property)Workers' compensation insurance requirements and employer obligations in IdahoUnemployment insurance employer liability and experience ratingSurety bonds: bid bonds, performance bonds, and payment bondsIndependent contractor classification criteria for UI tax exemptionMiller Act requirements for federal public works bondingUnemployment insurance reportable and non-reportable wagesPenalties for non-compliance with workers' compensation and unemployment insurance requirements
Manual de Referencia de Negocios y Leyes para Contratistas Sección 83 Q · 3%
Open bids vs. closed bids in public works constructionBid decision factors (qualifications, schedule, cost, job site, risk)Plans and specifications components (general conditions, drawings, specifications)Estimation methods: conceptual, preliminary, and detailed estimatesQuantity survey/takeoff process and measurement unitsLabor, materials, and equipment pricing in detailed estimatesGeneral and project overhead costs and contingency/allowanceMarkup calculation and area modification factors
Manual de Referencia de Negocios y Leyes para Contratistas Sección 91 Q · 1%
Essential elements of a valid contract (offer, acceptance, consideration, mutuality, legal purpose)Idaho Statute of Frauds — agreements required to be in writingIdaho construction contract retention limits and release timelines (Idaho Code 29-115)Types of construction contracts (lump sum, cost plus, time and materials, design-build, guaranteed maximum)Common required and optional provisions in construction contractsBreach of contract definition and civil remediesChange orders and additional work provisionsSubcontractor retention payment obligations and dispute withholding rules
Manual de Referencia de Negocios y Leyes para Contratistas Sección 102 Q · 2%
Project management phases: initiation, planning, executing, monitoring/controlling, and closingScheduling methods: Critical Path Method (CPM) and Gantt chartsFloat/slack time and critical path identificationStaffing roles: owner's representative, construction manager, superintendent, foreman, and expediterCost control procedures: variance detection, diagnostics, and corrective actionInventory control and purchase order systems for materialsQuality control: conformance to design specifications during constructionProject closeout: project close and contract closure
Manual de Referencia de Negocios y Leyes para Contratistas Sección 1110 Q · 10%
OSHA employer responsibilities and general duty clauseOSHA recordkeeping requirements (Forms 300, 300-A, 301)OSHA worksite inspection procedures and prioritiesPersonal protective equipment requirements by hazard typeFall protection systems and height thresholdsHazard communication and material safety data sheetsOSHA cooperative and voluntary protection programs (VPP, SHARP, Alliance)Construction-specific safety standards (excavation, scaffolding, confined spaces)
Manual de Referencia de Negocios y Leyes para Contratistas Sección 121 Q · 1%
Income tax filing requirements by business entity type (sole proprietor, partnership, S corporation, corporation, LLC)Federal and Idaho estimated tax payment requirements and thresholdsIdaho sales and use tax obligations for contractorsContractor vs. retailer vs. contractor/retailer sales tax classification and billing treatmentSales tax exemptions available to contractors (out-of-state jobs, agricultural irrigation, production machinery)Independent contractor vs. employee classification using the right-to-control testEmployment tax forms and withholding requirements for employees (W-4, I-9, W-2, EIN)Tax recordkeeping periods and retention requirements
Manual de Referencia de Negocios y Leyes para Contratistas Sección 133 Q · 3%
Right to lien under Idaho Title 45 (who qualifies and for what work)Filing requirements and deadlines for lien claims (90-day rule, county recorder, required contents)Priority and ranking of mechanic's lien claims among competing lienholdersDuration and enforcement of mechanic's liens (6-month limitation, court proceedings)Release of mechanic's lien by posting surety bond (bond form, petition, hearing process)Contractor recovery and deduction of subcontractor debts in lien actionsResidential property disclosure requirements for general contractors (Idaho 45-525)Lien waivers and joint checks as protective measures for contractors
Distinciones Clave
Accrual AccountingvsCash-Basis Accounting
Accrual accounting is GAAP-compliant and recognizes revenues and expenses when transactions occur, while cash-basis accounting records them only when payment is made or received and does not meet GAAP.
Contractor's Business and Law Reference Manual, Section 5: Accounting & Finance
Named-peril coverage protects only against losses from specifically listed items in the policy, while all-risk is the more common and broader coverage.
Most employers are assigned an experience rate for Idaho unemployment insurance, while governmental units and 501(c)(3) nonprofits may elect to reimburse the Idaho Employment Security Fund directly for actual benefit payment costs.
Contractor's Business and Law Reference Manual, Section 7: Insurance — Cost Reimbursement Employers
Brazed JointvsSoldered Joint
A brazed joint uses alloys melting above 840°F (449°C) but below the melting point of the parts joined, while a soldered joint uses alloys that melt at or below 840°F (449°C).
Contamination creates an actual hazard to public health through poisoning or disease spread (High Hazard), while pollution impairs aesthetic qualities of potable water without creating a health hazard (Low Hazard).
2017 ISPC Section 218.0 (Pollution)
AccessiblevsReadily Accessible
Accessible means access may first require removal of an access panel or similar obstruction, while Readily Accessible means direct access is available without removing any panel or obstruction.
2017 ISPC, Section 203.0
Building DrainvsBuilding Sewer
The building drain is the lowest drainage piping inside the building that ends 2 feet outside the building wall, at which point the building sewer begins and conveys waste to a public sewer or disposal point.
2017 ISPC, Section 204.0 - Building Drain
Battery of FixturesvsSoil Stack
A battery of fixtures is two or more similar adjacent fixtures discharging into a common horizontal waste or soil branch, while a soil stack is the common vertical pipe that receives discharge from those branches.
An independent contractor must be free from the employer's direction and control over the manner, method, and mode of work; if the employer controls these factors, the worker is a covered employee subject to Idaho unemployment insurance tax.
Contractor's Business and Law Reference Manual, Section 7: Insurance — Independent Contractor
The two-opening method requires each opening to have at least 1 sq in per 2,000 Btu/h for horizontal ducts, while the one-opening method requires at least 1 sq in per 3,000 Btu/h.
2017 ISPC Section 506.4.1(2)
Scaffold Fall Protection ThresholdvsGeneral Walking/Working Surface Fall Protection Threshold
Scaffold fall protection is required when employees work more than 10 feet above a lower level, while the general fall protection threshold for other walking and working surfaces is 6 feet.
Contractor's Business and Law Reference Manual, Section 11 / Construction Industry Digest, Scaffolds section
ADA Undue Hardship StandardvsTitle VII Religious Accommodation Undue Hardship Standard
ADA undue hardship requires showing significant difficulty or expense to the employer (a higher bar), while Title VII's standard is met by showing more than a minimal burden.
Contractor's Business and Law Reference Manual, Section 6 — Americans with Disabilities Act (ADA), Disability Discrimination & Reasonable Accommodation & Undue Hardship
Términos Clave
Hot Water (2017 ISPC Section 210.0) 2017 ISPC, Section 210.0 - Hot Water
Water at a temperature of 120°F (49°C) or higher, as defined by the 2017 Idaho State Plumbing Code.
Confined Space — Fuel-Burning Appliances (2017 ISPC Section 205.0) 2017 ISPC Section 205.0 (Confined Space definition)
A room or space with a volume less than 50 cubic feet per 1,000 Btu/h of the aggregate input rating of all fuel-burning appliances installed there.
A device identified by volume, 30-minute retention time, baffles, not fewer than two compartments, a total volume of at least 300 gallons (1,135 L), and gravity separation.
A connection or arrangement, physical or otherwise, between a potable water supply and a plumbing fixture or device through which nonpotable substances could enter the potable system under any condition.
Bathroom Group (2017 ISPC Section 204.0) 2017 ISPC Section 204.0 (Bathroom Group definition)
Any combination of plumbing fixtures not exceeding one water closet, two lavatories, one bathtub or combination bath/shower, and one shower, and may include a bidet and an emergency floor drain.
An individual vent may never be smaller than 1-1/4 inch, regardless of half the fixture drain size.
Static Water Pressure Conversion
Water exerts 0.433 psi per foot of elevation head; pressure difference between two points equals their elevation difference (in feet) multiplied by 0.433 psi/ft.
Drainage Fixture Unit (DFU) — UPC Table 702.1 UPC Chapter 7, Table 702.1 (Drainage Fixture Unit Values)
A measure of probable discharge load: flush-valve water closet = 6 DFU, lavatory = 1 DFU, floor drain = 2 DFU, service sink = 3 DFU.
Required on irrigation systems that include a chemical injector to protect the potable water supply.
Lead Content Limits — Solder/Flux vs. Fittings (2017 ISPC Section 604.2) 2017 ISPC Section 604.2
Solder and flux for potable water piping must contain no more than 0.2% lead; pipes, fittings, and fixtures must not exceed a weighted average of 0.25% lead on wetted surfaces.
Miller Act — Payment Bond Notification Contractor's Business and Law Reference Manual, Section 7: Insurance — The Miller Act
Under the Construction Industry Payment Protection Act amendment to the Miller Act, subcontractors may send payment bond claim notifications by any means verifiable by a third party, not solely by registered mail.
Safety and Health Management Systems (OSHA) Section 11, p. 99, Safety and Health Add Value
Workplaces that establish OSHA safety and health management systems can expect to reduce their injury and illness costs by 20 to 40 percent.
Fórmulas que Debes Saber
Static Water Pressure from Elevation HeadPressure (psi) = Elevation head (ft) × 0.433 psi/ft
Elevation Head Required for a Given PressureHeight (ft) = Desired pressure (psi) ÷ 0.433 psi/ft
Pressure Difference Between Two FixturesΔP (psi) = (Elevation A − Elevation B) ft × 0.433 psi/ft
Total Drainage Fixture Units (DFU) for a StackTotal DFU = Σ (fixture count × DFU rating per fixture type) for all floors
Combustion Air Volume — Standard MethodRequired volume (ft³) = Total appliance input (Btu/h) ÷ 1,000 × 50 ft³
Combustion Air Opening — Two Permanent Openings (Horizontal Duct)Min free area each opening (in²) = Total input rating (Btu/h) ÷ 2,000
Combustion Air Opening — One Permanent OpeningMin free area (in²) = Total input rating (Btu/h) ÷ 3,000
Gas Pipe Spare CapacitySpare capacity (cfh) = Pipe capacity from table (cfh) − Fixture demand (cfh)