CWI Duties, Ethics and Safety Study Guide (Part A)

What this domain covers

This domain covers the welding inspector's job and conduct, and how welding work is kept safe. The certification rules come from AWS QC1, the specification for AWS certification of welding inspectors, and the related qualification standard AWS B5.1. Safety questions draw on ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes. It is a small share of Part A, but scenario questions elsewhere on the exam also depend on knowing the inspector's authority.

The inspector's job

A welding inspector compares work against stated requirements: the drawings, the contract documents, the governing code and the welding procedure specification (WPS). The inspector's value is independent, factual judgment. The inspector is not the designer and does not change requirements.

A typical exam scenario: a weld does not meet the drawing, and someone on the shop floor says it is fine. The inspector reports the nonconformance and refers it to the party with authority to accept it, usually the engineer, preferably in writing. The inspector neither quietly accepts it nor orders work done outside the proper channel.

Inspection runs through the whole job:

• Before welding: documents (WPS and welder qualifications, covered in the welding performance guide), materials and consumables, joint preparation, fit-up and cleanliness.
• During welding: preheat and interpass temperature, filler metal, technique, root quality and interpass cleaning.
• After welding: visual examination, dimensions, any required nondestructive testing (NDT) and the final records. The weld examination guide covers each stage in detail.

Communication and reports

An inspection report may be used for acceptance, audits or a legal dispute years later. A good report:

• Records factual, verifiable observations and measurements.
• States the requirement each item was judged against.
• Is written promptly from notes, dated and signed.
• Leaves out opinions about people.

Clear, calm communication with welders, supervisors and engineers lets problems be fixed before welds are finished.

Ethics

QC1 includes a code of ethics. The themes are integrity, responsibility to the public and avoidance of conflicts of interest. In practice:

• Sign only for work you actually inspected. Signing for uninspected work is falsifying a record and can cost you the certification.
• Decline gifts from parties whose work you evaluate.
• Accept only work you are competent to perform.
• Report what you find, even when it is unwelcome.

An exam choice that hides, softens or skips a finding is usually wrong.

Keeping the certification

Under QC1, a CWI renews certification every three years and recertifies every nine years. Recertification is by examination or by the professional development option in force at the time.

QC1 also has vision requirements. Near vision must be Jaeger J2 or better at not less than 12 in., with or without correction. A color perception test is also required. Codes may add their own rules; AWS D1.1, for example, requires inspectors to have periodic eye examinations.

Working from the documents

An inspector can only judge work against requirements they know. Before a job starts, confirm which code and edition apply and which drawings and revisions are current. Also confirm which WPSs are approved and which welders are qualified for them. When documents conflict or are unclear, the inspector asks the responsible party for clarification rather than guessing. Keeping copies of what was used, and noting revision levels in reports, protects everyone if questions come up later.

Fire safety

Sparks and spatter travel a long way. Common hot-work rules are in ANSI Z49.1 and NFPA 51B. They call for combustibles within 35 ft (11 m) to be moved away or protected. When that is not possible, a fire watch is needed. The work area should be checked after welding is finished, because smoldering fires can start later. Fire rules for cutting and gouging are in the thermal cutting guide.

Compressed gas cylinders

• Secure cylinders upright so they cannot fall.
• Keep valve caps on when cylinders are not in use.
• In storage, keep oxygen and fuel gas cylinders at least 20 feet apart. The other option is a noncombustible barrier at least 5 ft high with at least a half-hour fire rating.
• Do not use free acetylene above 15 psig, because it can decompose violently.

Eye and skin protection

Arc radiation burns eyes and skin. Filter shade depends on the process and current. Take shielded metal arc welding (SMAW) between about 160 and 250 A. The AWS/ANSI lens shade guide lists a minimum shade 10 for it. It suggests a darker shade for comfort. Start darker and go lighter only if you cannot see the weld zone. Helpers and inspectors nearby need protection too.

Fumes and gases

• Galvanized steel: zinc oxide fume causes metal fume fever, a flu-like illness. Remove the coating near the weld or use local exhaust and respiratory protection.
• Stainless steel: fumes can contain hexavalent chromium, a serious health hazard.
• Chlorinated solvents: arc radiation can break their vapors down into phosgene, a highly toxic gas. Keep degreasing away from welding, and make sure parts are dry first.
• Ventilation: natural or mechanical ventilation and local exhaust keep the welder's breathing zone clear.

Electrical safety

Electric shock risk rises sharply in wet or confined spaces. The main controls are dry gloves and clothing, and insulation from the work and ground. Keep cables and holders well maintained, and never touch live parts with bare skin. Wet materials around the welder increase conductivity and risk.

How questions are framed

Questions in this domain often describe a workplace situation and ask what the inspector should do. Pick the answer that:

• Keeps the inspector within their authority.
• Documents facts.
• Routes decisions to the person who owns them.
• Protects people first.

Mark J. Curry's tip: on ethics questions, imagine the report being read out in a courtroom. The defensible action is the right answer.

Related: CWI vs CAWI vs SCWI and how to become a welding inspector.

Work through the free duties and safety practice questions. To see which Part A topic to study first, take the free CWI diagnostic test.

Sources

The Duties, Responsibilities and Safety questions cite these documents, by document and, where we can confirm it, chapter or section. We never reproduce them.

1. ANSI Z49.1 (6 questions)
2. AWS QC1 (4 questions)
3. AWS D1.1 (1 question)
4. OSHA 29 CFR 1910.253 (1 question)

Found a mistake? Use "Report a problem" under any question, and Mark J. Curry checks it.

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