100+ Free IA HVAC Practice Questions

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100+ Questions

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2026 Statistics

Key Facts: IA HVAC Exam

75%

Passing Score

Iowa Plumbing and Mechanical Systems Board

100 Q

Practice Questions

OpenExamPrep

Varies by exam

Exam Fee

Iowa Plumbing and Mechanical Systems Board

$5,000 surety bond

Surety Bond

Iowa Plumbing and Mechanical Systems Board

About the IA HVAC Exam

The Iowa HVAC contractor licensing exam tests knowledge of state regulations, mechanical codes, HVAC system design and installation, refrigerant handling, safety, and business management. 4 years apprentice + 2 years journeyman for master.

Questions

100 scored questions

Time Limit

3-4 hours

Passing Score

75%

Exam Fee

Varies by exam (Iowa Plumbing and Mechanical Systems Board (DIAL))

IA HVAC Exam Content Outline

25%

State Laws & Licensing

Iowa HVAC licensing, bond/insurance requirements, permits, and contractor regulations

25%

Trade Knowledge

HVAC system design, load calculations, ductwork, refrigerant handling, and energy efficiency

20%

Mechanical Codes

IMC compliance, venting, combustion air, gas piping, and code requirements

15%

Safety Regulations

OSHA safety, EPA Section 608, refrigerant management, and worker protection

15%

Business Management

Contracts, estimating, liens, insurance, and business operations

How to Pass the IA HVAC Exam

What You Need to Know

Passing score: 75%
Exam length: 100 questions
Time limit: 3-4 hours
Exam fee: Varies by exam

Keys to Passing

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

IA HVAC Study Tips from Top Performers

1Focus on Iowa-specific HVAC licensing regulations and requirements

2Review the International Mechanical Code sections on venting, combustion air, and equipment installation

3Study EPA Section 608 refrigerant handling requirements and safety protocols

4Practice load calculation concepts relevant to Iowa's climate

Frequently Asked Questions

What license do I need for HVAC work in Iowa?

Iowa requires a Master HVAC Contractor license. Requirements include 4 years apprentice + 2 years journeyman for master.

What score do I need to pass?

You need 75% to pass the Iowa HVAC contractor exam.

What bond and insurance does Iowa require?

Iowa requires $500,000 general liability. Bond: $5,000 surety bond.

Is continuing education required?

CE requirements: As required by Board.