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100+ Free VA ISC QI Practice Questions

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Key Facts: VA ISC QI Exam

USD 85

PSI QI Specialty Fee

DPOR Board for Contractors / PSI Specialty CIB

Open Book

Book Policy

PSI Specialty CIB

ISC

Official Specialty Abbreviation

18VAC50-22-30

QI exam required

Technical Examination

DPOR A501-27EXINFO 09/01/2025

Virginia Landscape Irrigation Contracting Qualified Individual Examination is the official DPOR/PSI specialty exam for the ISC specialty (18VAC50-22-30). PSI fee is USD 85. Official item count is on the PSI specialty outline.

Sample VA ISC QI Practice Questions

Try these sample questions to test your VA ISC QI exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under 18VAC50-22-30, what work does Virginia landscape irrigation contracting (ISC) authorize?
A.Installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems
B.Only planting, grading, and construction of landscape retaining walls
C.Installation of indoor potable plumbing, water heaters, and sanitary drains
D.Installation of water-based fire-suppression sprinkler systems in buildings
Explanation: 18VAC50-22-30 defines landscape irrigation contracting as the service that provides for the installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. That is the entire licensed ISC function. Planting and landscape walls are LSC work, indoor plumbing is PLB work, and fire sprinklers are the SPR classification.
2What official abbreviation does 18VAC50-22-30 assign to landscape irrigation contracting?
A.LSC
B.IRR
C.ISC
D.SPR
Explanation: The Board for Contractors regulation writes the specialty as landscape irrigation contracting (Abbr: ISC). Candidates should match that three-letter code on a Virginia contractor license to this outdoor-sprinkler scope, not to landscape service or fire sprinklers.
3Besides an ISC specialty, which Virginia license classifications also provide landscape irrigation functions under 18VAC50-22-30?
A.ELE and HVA only
B.CBC and RBC only
C.ASB and LAC only
D.PLB and H/H
Explanation: The ISC definition states that the PLB and H/H classifications also provide this function. A firm holding plumbing or highway/heavy may perform irrigation-sprinkler work without a separate ISC designation. CBC and RBC include landscape service (LSC), but they do not automatically include irrigation.
4When may an ISC specialty contractor install a backflow prevention device on an irrigation job?
A.Whenever the homeowner asks, with no extra training
B.Only if the device is incidental to the irrigation work and the installer has board-approved vocational training that included backflow installation
C.Never; only a master plumber may touch any backflow device in Virginia
D.Only on fire-sprinkler mains, never on landscape irrigation
Explanation: 18VAC50-22-30 allows ISC to install backflow prevention devices incidental to work in this specialty when the installer has received formal vocational training approved by the board that included instruction in the installation of backflow prevention devices. The permission is limited, trained, and incidental — it is not a stand-alone plumbing backflow practice.
5How does landscape irrigation contracting (ISC) differ from landscape service contracting (LSC) under 18VAC50-22-30?
A.They are the same specialty and share the abbreviation LSC
B.ISC is outdoor sprinkler systems; LSC is excavation, clearing, grading, landscape retaining walls, and landscaping timbers
C.ISC covers only indoor plant watering; LSC covers only rooftop gardens
D.LSC is the only specialty that may install irrigation heads
Explanation: ISC is limited to irrigation sprinkler systems or outdoor sprinkler systems. LSC is the alteration or improvement of a land area by excavation, clearing, grading, construction of retaining walls for landscaping purposes, or placement of landscaping timbers. A contractor who only holds LSC is not licensed for sprinkler installation.
6A Virginia firm holds only a CBC classification. Does that classification, by itself, authorize landscape irrigation sprinkler installation?
A.Yes; CBC includes every specialty listed in 18VAC50-22-30
B.Yes; CBC includes LSC, and LSC includes sprinklers
C.No; 18VAC50-22-20 lists LSC among CBC functions but does not list ISC, and 18VAC50-22-30 assigns irrigation overlap only to PLB and H/H
D.No, because only Class A firms may install irrigation
Explanation: CBC includes landscape service contracting among its listed functions, but it does not include landscape irrigation. The ISC definition names only PLB and H/H as the overlapping classifications. The firm needs ISC, PLB, or H/H before it installs outdoor sprinkler systems.
7Which of the following is inside the ISC specialty as written in 18VAC50-22-30?
A.Removal of an existing outdoor sprinkler system
B.Installation of a building fire-sprinkler riser
C.Construction of a landscape timber retaining wall with no irrigation
D.Replacement of a water heater and sanitary stack
Explanation: The ISC definition expressly includes installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. Taking out an old outdoor sprinkler system is therefore licensed ISC work. Fire risers, landscape walls, and water heaters belong to other classifications.
8Why is a water-based building fire-sprinkler system outside the ISC specialty?
A.Because fire sprinklers use a different water chemistry than irrigation
B.Because 18VAC50-22-20 assigns water fire-suppression systems to fire sprinkler contracting (SPR), while ISC is limited to irrigation or outdoor sprinkler systems
C.Because only HVA contractors may pipe any water indoors
D.Because ISC may install fire sprinklers if the heads are bronze
Explanation: SPR is the classification for sprinkler systems that use water as fire suppression when annexed to real property. ISC is a specialty for irrigation sprinkler systems or outdoor sprinkler systems. The two share the word sprinkler but not the licensed function.
9An ISC Qualified Individual is asked to replace a kitchen sink, trap, and branch drain while on site to repair a lawn sprinkler. What is the correct scope decision?
A.Do the sink work; ISC includes any water piping on the property
B.Do the sink work if the homeowner signs a waiver
C.Decline the indoor plumbing; ISC is irrigation or outdoor sprinkler systems, not sanitary fixtures
D.Do the sink work because PLB automatically attaches to every ISC license
Explanation: ISC is limited to irrigation sprinkler systems or outdoor sprinkler systems. Kitchen fixtures and sanitary drains are plumbing functions under the PLB classification. Holding ISC does not grant a general plumbing license.
10Which system is clearly inside the ISC definition of outdoor sprinkler systems?
A.A rooftop cooling-tower spray used for HVAC heat rejection
B.A residential pop-up lawn-sprinkler system in a Virginia yard
C.A wet-pipe office fire-sprinkler grid
D.A kitchen grease-interceptor wash-down
Explanation: A pop-up lawn-sprinkler system is an irrigation sprinkler system or outdoor sprinkler system — the exact ISC wording. HVAC process spray, building fire sprinklers, and grease-interceptor piping are other trades.

About the VA ISC QI Exam

The Virginia Landscape Irrigation Contracting Qualified Individual Examination is the official PSI technical examination for the ISC specialty. 18VAC50-22-30 defines the specialty as installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. Incidental backflow devices are allowed only with board-approved vocational training that included backflow instruction. The PSI specialty examination fee is USD 85. The examination is open book. Official scored item count, time, and passing score appear on the PSI specialty content outline. This bank is an English-language MCQ study adaptation. It does not replace required trade experience, pre-license education, board approval, or the official examination.

Assessment

Computer-based open-book multiple-choice Qualified Individual examination for the ISC specialty. Official 18VAC50-22-30 scope: installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. Incidental backflow devices are allowed only with board-approved vocational training that included backflow instruction.

Time Limit

120 minutes

Passing Score

74% (37 of 50 correct)

Exam Fee

USD 85 (PSI Services (for the Virginia Board for Contractors / DPOR))

VA ISC QI Exam Content Outline

study

ISC Scope

ISC Scope within the official ISC specialty definition

study

Hydraulics and Zoning

Hydraulics and Zoning within the official ISC specialty definition

study

Heads and Valves

Heads and Valves within the official ISC specialty definition

study

Incidental Backflow

Incidental Backflow within the official ISC specialty definition

study

Jobsite Safety

Jobsite Safety within the official ISC specialty definition

How to Pass the VA ISC QI Exam

What You Need to Know

  • Passing score: 74% (37 of 50 correct)
  • Assessment: Computer-based open-book multiple-choice Qualified Individual examination for the ISC specialty. Official 18VAC50-22-30 scope: installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. Incidental backflow devices are allowed only with board-approved vocational training that included backflow instruction.
  • Time limit: 120 minutes
  • Exam fee: USD 85

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

VA ISC QI Study Tips from Top Performers

1Study the official 18VAC50-22-30 ISC specialty definition
2Use the PSI specialty content outline and listed references
3Permanent tabs are allowed in listed code books; study guides are not permitted in the PSI center
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the Virginia ISC Qualified Individual exam?

The DPOR-approved PSI specialty content outline lists 50 scored questions, 120 minutes, and a minimum passing score of 74% (37 of 50 correct). PSI may also administer 5 to 10 unscored experimental items. Those numbers are published on the individual specialty content outline linked from the Contractor Specialty Examination CIB, not in the main bulletin.

How much does the Virginia ISC QI exam cost?

PSI charges USD 85 for a Qualified Individual specialty examination (DPOR Board for Contractors page and PSI Specialty CIB).

What work does a Virginia ISC specialty cover?

18VAC50-22-30 defines this specialty as installation, repair, improvement, or removal of irrigation sprinkler systems or outdoor sprinkler systems. Incidental backflow devices are allowed only with board-approved vocational training that included backflow instruction.

Is this practice bank the official PSI exam?

No. This is an English-language multiple-choice study adaptation. It is not an official translation, format simulation, or substitute for the PSI examination or required field experience.