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VIRGINIA SOLAR THERMAL SYSTEMS CONTRACTOR EXAM — 200 PRACTICE QUESTIONS AND CORRECT ANSWERS WITH DETAILED RATIONALES

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This comprehensive practice exam bank is your ultimate preparation resource for the Virginia Alternative Energy Systems (AES) specialty exam. Designed specifically for the Virginia Department of Professional and Occupational Regulation (DPOR) licensing requirements, this guide contains 350 multiple-choice questions with detailed answers and rationales to ensure you master the material and pass with confidence. What's Inside This Complete Study Guide? This practice exam covers every topic you need to know, organized into nine key sections that mirror the actual AES exam: Section 1: Virginia Contractor Licensing & Regulations (Questions 1-20): Master the Virginia Administrative Code (VAC), DPOR requirements, license classifications (Class A, B, C), bond amounts, down payment limits, and the legal scope of the AES specialty. Section 2: Solar Thermal System Fundamentals (Questions 21-70): Build a solid foundation in solar thermal technology. Topics include flat-plate and evacuated tube collectors, active vs. passive systems, heat transfer fluids (propylene glycol), freeze protection, system components, and the principles of solar thermal energy conversion. Section 3: System Design & Sizing (Questions 71-110): Learn how to properly size a solar thermal system. This section covers load determination, solar fraction, collector orientation and tilt, storage tank sizing, pipe sizing, flow rates, and software tools like TRNSYS and F-Chart. Section 4: Installation & Code Compliance (Questions 111-150): Ensure your installations meet all Virginia and national standards. Topics include the Virginia Uniform Statewide Building Code (USBC), NEC requirements (Articles 690, 705), rapid shutdown, grounding, combiner boxes, and roof attachment methods. Section 5: Safety & OSHA Regulations (Questions 161-200): Prioritize safety on every job site. This section covers fall protection, lockout/tagout (LOTO), arc flash protection, ladder safety, working with antifreeze, pressure testing, and heat stress prevention. Section 6: Legal & Business Practices (Questions 131-150): Understand your legal responsibilities as a Virginia contractor. Topics include mechanic's liens, the Virginia Consumer Protection Act, workers' compensation, third-party ownership, and handling complaints from the Board for Contractors. Section 7: System Components & Equipment (Questions 151-170): Gain a deep understanding of solar PV and thermal system components, including photovoltaic cells, inverters, charge controllers, MC4 connectors, bypass diodes, and the differences between string inverters and microinverters. Section 8: Site Assessment & Energy Analysis (Questions 171-190): Master the art of site assessment. Topics include solar resource evaluation, shading analysis (using a solar pathfinder), load analysis, energy audits, payback periods, ROI calculations, and the federal Investment Tax Credit (ITC). Section 9: Maintenance & Troubleshooting (Questions 191-200): Learn how to keep systems running efficiently. This section covers annual inspections, cleaning collector glazing, checking antifreeze concentration, flushing systems, and troubleshooting common failures like freeze damage and pump issues. Why Choose This Guide? Realistic Practice: Get the most authentic test-taking experience with 350 questions designed to reflect the actual difficulty and style of the Virginia AES exam. Detailed Rationales: Every question includes a clear, concise rationale that explains why the answer is correct and why the other options are not. This is crucial for building deep understanding, not just memorization. Updated for 2026: Stay current with the latest Virginia regulations, code requirements, and industry best practices. Comprehensive Coverage: One resource covers the entire scope of the exam—no need to search through multiple books or websites. Pass Your Exam with Confidence: This guide is designed to help you pass the Virginia Solar Thermal Systems Contractor Exam and start your career as a licensed AES contractor.

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VIRGINIA SOLAR THERMAL SYSTEMS CONTRACTOR
EXAM — 200 PRACTICE QUESTIONS AND CORRECT
ANSWERS WITH DETAILED RATIONALES

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Section 1: Licensing & Regulatory Framework (Questions 1–50)


1. Which Virginia agency is responsible for overseeing contractor licensing for
alternative energy systems?
A) Virginia Department of Energy
B) Virginia Department of Professional and Occupational Regulation (DPOR)
C) Virginia State Corporation Commission
D) Virginia Board of Education


Correct Answer: B
Rationale: The Virginia Department of Professional and Occupational
Regulation (DPOR) manages contractor licensing across all categories,
including Alternative Energy System Contracting. DPOR's Board for
Contractors specifically oversees licensing requirements and examinations for
AES and other contractor specialties.


2. What is the minimum passing score for the Virginia AES specialty exam?
A) 65%
B) 70%
C) 72%

,D) 75%


Correct Answer: C
Rationale: The Virginia Board for Contractors requires a minimum passing
score of 72% for the AES specialty exam administered by PSI.


3. Under Virginia regulations, what is the maximum project value for a Class C
licensed contractor?
A) $5,000
B) $10,000
C) $15,000
D) $25,000


Correct Answer: B
Rationale: Virginia contractor licenses are based on project dollar thresholds.
A Class C license allows contractors to perform individual projects with a
maximum value of $10,000. Class B covers projects between $10,000 and
$120,000, and Class A covers projects exceeding $120,000.


4. What license classification covers the installation of solar photovoltaic
systems in Virginia?
A) Class C Residential Building
B) Electrical Journeyman License
C) Alternative Energy Systems Contracting (AES)
D) Master Plumber License


Correct Answer: C

,Rationale: The Alternative Energy Systems Contracting (AES) specialty license
covers the installation of solar photovoltaic systems, solar thermal systems,
wind energy systems, and geothermal systems in Virginia.


5. Which Virginia regulation defines the scope of practice for an AES
contractor?
A) Virginia Uniform Statewide Building Code
B) Virginia Electrical Safety Act
C) Virginia Administrative Code § 18-124-10
D) Virginia Consumer Protection Act


Correct Answer: C
Rationale: VAC § 18-124-10 specifically outlines licensure requirements and
the scope of work for Alternative Energy System contractors in Virginia.


6. Which activity is explicitly excluded from the AES contractor scope of work?
A) Installing solar photovoltaic panels
B) Installing residential wind turbines
C) Installing emergency generators powered by fossil fuels
D) Installing geothermal heat pump loops


Correct Answer: C
Rationale: Emergency generators that run on fossil fuels are specifically
excluded from the AES specialty. AES focuses on alternative energy generation
systems.


7. What must you obtain before scheduling the AES exam with PSI?

, A) A passing NABCEP certificate
B) A valid electrician journeyman license
C) Pre-approval from the Virginia Department of Professional and
Occupational Regulation (DPOR)
D) Proof of 5 years of contracting experience


Correct Answer: C
Rationale: DPOR must pre-approve your application before you can schedule
any contractor specialty examination, including AES.


8. What is the minimum bond amount required for a Class A Alternative
Energy System Contractor in Virginia?
A) $10,000
B) $25,000
C) $50,000
D) $100,000


Correct Answer: C
Rationale: Virginia Class A contractors must maintain a minimum bond of
$50,000 as part of their licensing requirements. This bond protects consumers
in case of contractor default or non-performance.


9. Under Virginia regulations, what is the correct name of the specialty that
covers solar, wind, and geothermal work from the customer's meter?
A) Solar Energy Specialist License
B) Alternative Energy System Contracting (AES)
C) Renewable Energy Installer Certification

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