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100+ Free MS HVAC Practice Questions

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2026 Statistics

Key Facts: MS HVAC Exam

70%

Passing Score (Both Exams)

MSBOC

2 Exams

Trade + Business/Law

MSBOC

$10K / $50K

License Thresholds (Res/Comm)

MSBOC

$20K

Min Net Worth (Specialty)

MSBOC

100 Q

Practice Questions Available

OpenExamPrep

About the MS HVAC Exam

The Mississippi HVAC contractor license requires passing two exams: an 80-question HVAC trade exam and a 50-question business and law exam. The HVAC specialty covers heating, cooling, ventilation, fuel gas systems, ductwork, and related work. Residential projects over $10,000 and commercial projects over $50,000 require licensure.

Questions

130 scored questions

Time Limit

6 hours total (4 hr trade + 2 hr business/law)

Passing Score

70% on each exam

Exam Fee

$120 (trade) + business/law fee + $400 application (Mississippi State Board of Contractors (MSBOC))

MS HVAC Exam Content Outline

25%

State Laws & Licensing

MSBOC regulations, license thresholds ($10K residential/$50K commercial), insurance, net worth, and application requirements

25%

HVAC Trade Knowledge

Cooling systems, heat pumps, refrigerant handling, dehumidification, and equipment diagnostics

20%

Ductwork & Air Distribution

Duct design, insulation, sealing, moisture prevention, and Manual D procedures

15%

Business & Law

Contract law, lien rights, insurance requirements, financial management, and consumer protection

15%

Safety & Codes

OSHA, gas safety, EPA Section 608, mechanical codes, and heat illness prevention

How to Pass the MS HVAC Exam

What You Need to Know

  • Passing score: 70% on each exam
  • Exam length: 130 questions
  • Time limit: 6 hours total (4 hr trade + 2 hr business/law)
  • Exam fee: $120 (trade) + business/law fee + $400 application

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

MS HVAC Study Tips from Top Performers

1Study both the HVAC trade content AND Mississippi business/law — you must pass two separate exams
2Focus on humidity control and dehumidification concepts, as Mississippi's humid climate makes this critical
3Know the licensing thresholds: $10,000 residential, $50,000 commercial
4Review the net worth and insurance requirements: $20K net worth (specialty), $300K/$600K general liability

Frequently Asked Questions

When do I need a Mississippi HVAC contractor license?

A license is required for residential HVAC work over $10,000 and commercial HVAC work over $50,000. Below these thresholds, check with local building officials for their requirements.

What exams are required for the Mississippi HVAC license?

Two exams: an HVAC trade exam (80 questions, 4 hours, $120) and a business and law exam (50 questions, 2 hours). Both require a 70% passing score.

What financial requirements must I meet?

You must submit a CPA-reviewed financial statement showing a minimum net worth of $20,000 (specialty) or $50,000 (major classification), plus $300,000/$600,000 general liability insurance.

How much does the Mississippi HVAC license cost total?

The application fee is $400 (includes one specialty), plus $120 for the trade exam and the business/law exam fee. Additional specialties cost $100 each.