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Key Facts: CWI Exam
25-30%
First-Time Pass Rate
AWS data
72%
Passing Score
Each part
150
Part A Questions
2 hours
5+ years
Experience Required
AWS requirement
3 years
Certification Valid
Recertification required
$55-120k
Salary Range
Industry data
The AWS CWI exam has a challenging 25-30% first-time pass rate. The exam consists of three parts: Part A (Fundamentals - 150 questions, 2 hours, closed book), Part B (Practical - 46 questions using weld replicas and tools), and Part C (Code Book - 50-65 questions, 3 hours, open book). Each part requires 72% to pass. Candidates must have 5+ years of welding-related experience (engineering, welding, or inspection). The certification is highly valued in construction, manufacturing, and pipeline industries.
About the CWI Exam
The AWS Certified Welding Inspector (CWI) exam is a three-part certification for professionals who inspect welds in structural steel, pipelines, pressure vessels, and other applications. Part A covers welding fundamentals (150 questions, closed book), Part B is hands-on practical inspection (46 questions), and Part C tests code book application (50-65 questions, open book).
Questions
150 scored questions
Time Limit
6 hours (Part A), 2 hours (Part B), 3 hours (Part C)
Passing Score
72% per part
Exam Fee
$1,070-$1,285 (American Welding Society (AWS))
CWI Exam Content Outline
Welding Processes & Procedures
SMAW, GMAW, GTAW, FCAW, SAW processes, WPS, PQR, welder qualification, essential variables, preheat and interpass temperature
Welding Metallurgy & Materials
Carbon and alloy steels, stainless steel, aluminum, heat-affected zone, phase diagrams, heat treatment, cracking mechanisms
NDE Methods
Visual inspection (VT), radiographic testing (RT), ultrasonic testing (UT), magnetic particle (MT), liquid penetrant (PT), acceptance criteria
Weld Discontinuities & Quality
Porosity, slag inclusions, lack of fusion, cracks, undercut, distortion control, acceptance standards per AWS D1.1, API 1104, ASME
Safety & Documentation
OSHA welding safety, PPE, hexavalent chromium exposure, hot work permits, WPS documentation, inspection reports, audit trails
How to Pass the CWI Exam
What You Need to Know
- Passing score: 72% per part
- Exam length: 150 questions
- Time limit: 6 hours (Part A), 2 hours (Part B), 3 hours (Part C)
- Exam fee: $1,070-$1,285
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
CWI Study Tips from Top Performers
Frequently Asked Questions
What is the pass rate for the CWI exam?
The AWS CWI exam has approximately a 25-30% first-time pass rate, making it one of the more challenging certification exams. Many candidates fail one or more parts on their first attempt. The exam's difficulty reflects the critical safety role welding inspectors play in structural integrity. With thorough preparation using 200+ practice questions and hands-on code book study, you can significantly improve your chances.
How many questions are on each part of the CWI exam?
The CWI exam has three parts: Part A (Fundamentals) has 150 multiple-choice questions with a 2-hour time limit. Part B (Practical) has 46 questions requiring hands-on inspection of weld replicas and use of inspection tools. Part C (Code Book) has 50-65 questions with a 3-hour time limit, testing your ability to apply welding codes (D1.1, API 1104, or ASME Section IX). Each part requires 72% to pass.
What experience do I need to take the CWI exam?
AWS requires 5+ years of welding-related experience for the CWI exam. This can include work as a welder, welding engineer, welding supervisor, or quality control inspector. An engineering degree can substitute for some experience. AWS also offers the Certified Associate Welding Inspector (CAWI) for those with less experience, which can be upgraded to CWI later.
Which welding code book should I choose for Part C?
Most candidates choose AWS D1.1 (Structural Welding Code - Steel) because it is the most commonly used in general fabrication and construction. API 1104 is used for pipeline work. ASME Section IX is for pressure vessels and boilers. Choose the code that matches your industry or the one you are most familiar with. You can change your code book selection when you register for the exam.
How long is CWI certification valid?
CWI certification is valid for 3 years. To maintain your certification, you must submit a renewal application with evidence of 80 hours of continuing education or retake the exam. Many CWIs maintain certification through AWS seminars, technical courses, and industry conferences. Recertification ensures inspectors stay current with changing codes and technologies.
What is the salary range for a Certified Welding Inspector?
CWI salaries vary by industry and location. According to AWS and industry surveys, entry-level CWIs typically earn $55,000-$75,000 annually. Experienced CWIs in high-demand sectors (oil & gas, nuclear, aerospace) can earn $80,000-$120,000+. Senior CWIs and those with additional certifications (SCWI, CWE) can exceed $150,000. Many CWIs work as independent contractors at higher hourly rates.