AWS CWI Exam Flashcards

Q: What does the AWS CWI exam cover?

The CWI exam covers welding fundamentals, hands-on inspection skills, and code application. High-value study areas include welding symbols, discontinuities, visual inspection, NDE, metallurgy, WPS/PQR documents, welder qualification, safety, and measurement.

Q: Is employer sponsorship required for the CWI exam?

No. Candidates apply through AWS and must satisfy the education, welding-related experience, vision, documentation, and testing requirements, but employer sponsorship is not a general requirement.

Q: What score is needed to pass the CWI exam?

AWS requires a minimum score of 72% on each exam part and a 72% minimum overall composite score for the CWI credential.

Q: How should these flashcards be used for CWI Part B?

Use them to reinforce inspection language before practicing with gauges, weld replicas, drawings, and specification criteria. Part B success depends on applying concepts to measurements and accept/reject decisions.

Question 1

Reference Line

Accepted Answer

The horizontal line in a welding symbol that carries the weld symbol, dimensions, tail information, and other requirements. Read the placement of symbols relative to this line before interpreting size or length.

Question 2

Arrow Side vs Other Side

Accepted Answer

A weld symbol below the reference line applies to the arrow side of the joint. A symbol above the reference line applies to the other side. This distinction controls where the weld is made.

Question 3

Field Weld Symbol

Accepted Answer

A flag at the arrow-reference line junction means the weld is to be made in the field rather than in the shop. The inspector should verify the correct location and conditions for field work.

Question 4

All-Around Symbol

Accepted Answer

A circle at the arrow-reference line junction indicates the weld continues around the entire joint where geometry permits. Inspect the full perimeter, not just the side shown in the drawing view.

Question 5

Tail of a Welding Symbol

Accepted Answer

The tail may identify the process, specification, procedure, or other reference information. If no extra reference is needed, the tail may be omitted without changing the basic weld requirement.

Question 6

Discontinuity

Accepted Answer

An interruption in the expected weld or base-metal structure, such as porosity, undercut, or lack of fusion. A discontinuity becomes a defect only when it exceeds the applicable acceptance criteria.

Question 7

Crack

Accepted Answer

A fracture-type discontinuity with a sharp tip and high stress concentration. Cracks are treated seriously because they can grow under load, vibration, or thermal cycling.

Question 8

Porosity

Accepted Answer

Rounded cavities caused by gas trapped as the weld metal solidifies. Common contributors include contamination, poor shielding, moisture, excessive travel speed, or unstable welding conditions.

Question 9

Slag Inclusion

Accepted Answer

Nonmetallic slag trapped in the weld metal or between passes. It often points to poor cleaning between passes, improper electrode manipulation, or joint geometry that traps slag.

Question 10

Incomplete Fusion

Accepted Answer

A condition where weld metal fails to fuse with the base metal or a previous weld bead. It is commonly associated with insufficient heat, poor access, improper angle, or incorrect travel technique.

Question 11

Undercut

Accepted Answer

A groove melted into base metal next to the weld toe or root and left unfilled. It reduces section thickness and creates a notch that can concentrate stress.

Question 12

Visual Testing (VT)

Accepted Answer

The first-line inspection method for weld surface condition, profile, dimensions, and workmanship. VT is most effective when performed before, during, and after welding instead of only at final inspection.

Question 13

Fillet Weld Gauge

Accepted Answer

A tool used to verify fillet weld leg size, throat-related dimensions, and profile features. The inspector must seat the gauge correctly against both members before making an accept/reject call.

Question 14

Weld Reinforcement

Accepted Answer

Extra weld metal above the required surface or contour of a groove weld. Some reinforcement may be acceptable, but excessive buildup can create stress concentration or interfere with fit-up.

Question 15

Root Opening

Accepted Answer

The separation between members at the root before welding. It affects penetration, access for the root pass, filler metal volume, and whether the joint matches the approved procedure.

Question 16

Fit-Up Inspection

Accepted Answer

The check performed before welding to verify joint preparation, alignment, backing, root opening, cleanliness, and procedure requirements. Finding problems at fit-up prevents expensive repairs later.

Question 17

Liquid Penetrant Testing (PT)

Accepted Answer

An NDE method that uses capillary action to reveal surface-breaking discontinuities. It works on many nonporous materials but cannot find discontinuities that do not open to the surface.

Question 18

Magnetic Particle Testing (MT)

Accepted Answer

An NDE method that magnetizes ferromagnetic material and uses particles to show leakage fields at surface or near-surface discontinuities. It is not suitable for nonmagnetic materials.

Question 19

Ultrasonic Testing (UT)

Accepted Answer

An NDE method that sends sound waves into a material and evaluates reflected signals. UT is useful for locating internal planar discontinuities such as cracks or lack of fusion.

Question 20

Radiographic Testing (RT)

Accepted Answer

An NDE method that uses radiation to produce an image of internal weld conditions. It is strong for volumetric discontinuities and creates a record, but orientation and safety controls matter.

Question 21

NDE Method Selection

Accepted Answer

Choose the method based on material, expected discontinuity type, location, access, code requirements, and safety. No single method is best for every weld or every discontinuity.

Question 22

Heat-Affected Zone (HAZ)

Accepted Answer

The region of base metal that did not melt but had its properties or microstructure changed by welding heat. The HAZ is important because hardness, toughness, and cracking risk can change there.

Question 23

Preheat

Accepted Answer

Heating the base metal before welding to slow cooling, reduce thermal gradients, and lower cracking risk. Required preheat depends on material, thickness, hydrogen control, restraint, and code requirements.

Question 24

Interpass Temperature

Accepted Answer

The temperature of the weld area before the next weld pass is deposited. The inspector checks it because too cold or too hot can affect cracking risk and mechanical properties.

Question 25

Hydrogen-Induced Cracking

Accepted Answer

A delayed cracking mechanism promoted by diffusible hydrogen, a susceptible microstructure, and tensile stress. Control methods include low-hydrogen consumables, clean surfaces, preheat, and proper storage.

Question 26

Carbon Equivalent

Accepted Answer

A way to estimate steel hardenability and weldability from chemical composition. Higher values generally mean greater attention to preheat, hydrogen control, and heat input.

Question 27

Residual Stress

Accepted Answer

Stress locked into the weldment after uneven heating and cooling. It can contribute to distortion, cracking, and service performance concerns even when no external load is applied.

Question 28

Code vs Standard vs Specification

Accepted Answer

A code usually contains mandatory rules, a standard provides agreed technical requirements, and a specification defines detailed requirements for a material, process, or product. Contract language determines what is enforceable.

Question 29

AWS QC1

Accepted Answer

The AWS document that governs certification of welding inspectors. Do not confuse it with a construction welding code such as AWS D1.1, which governs welded structural work when specified.

Question 30

Part C Code Application

Accepted Answer

The code application portion tests whether a candidate can locate and apply requirements from the assigned codebook. Efficient navigation and careful reading matter more than memorizing every table.

Question 31

Acceptance Criteria

Accepted Answer

The code, specification, drawing, or contract requirements used to decide whether a weld condition is acceptable. An inspector should identify the governing criteria before making a rejection.

Question 32

Inspector Responsibility

Accepted Answer

A CWI verifies that work meets the specified requirements and documents results. The inspector should not replace engineering judgment or change contract requirements without proper authority.

Question 33

Welding Procedure Specification (WPS)

Accepted Answer

A written instruction for making a production weld. It lists variables such as process, base metal, filler metal, joint design, electrical parameters, position, preheat, and shielding.

Question 34

Procedure Qualification Record (PQR)

Accepted Answer

The record of actual variables used to weld a qualification test coupon and the test results. A PQR supports one or more WPSs within the limits allowed by the governing code.

Question 35

Essential Variable

Accepted Answer

A welding variable that can affect the mechanical properties or soundness of the weld. Changing an essential variable beyond its qualified range generally requires requalification.

Question 36

Prequalified WPS

Accepted Answer

A WPS allowed by a code without procedure qualification testing when all prequalification requirements are satisfied. If the joint, process, material, or variable falls outside those rules, qualification is needed.

Question 37

Guided Bend Test

Accepted Answer

A destructive test that bends a welded specimen to reveal ductility and soundness. The inspector evaluates discontinuities exposed on the tension surface against the applicable acceptance criteria.

Question 38

Welder Performance Qualification

Accepted Answer

A test that demonstrates a welder can deposit sound weld metal with a specific process under defined conditions. It qualifies the person, not the welding procedure.

Question 39

Qualified Position Range

Accepted Answer

The welding position used for a performance test controls which production positions the welder may use. More difficult test positions can qualify broader work ranges when the code allows.

Question 40

Continuity of Qualification

Accepted Answer

Welder qualification may depend on continued use of the qualified process and proper records. The inspector should verify continuity before accepting production welds.

Question 41

CWI Witnessing a Welder Test

Accepted Answer

When witnessing qualification, the CWI verifies identity, WPS use, test assembly details, essential variables, testing, and documentation. The goal is traceable evidence of welder ability.

Question 42

Hot Work Fire Watch

Accepted Answer

Welding and cutting can ignite nearby combustibles from sparks, slag, or heat transfer. A fire watch and area preparation are used when hazards cannot be fully removed or isolated.

Question 43

Arc Radiation

Accepted Answer

The welding arc emits intense ultraviolet and infrared energy. Eye and skin protection, screens, and controlled access help prevent burns and eye injuries.

Question 44

Fume Control

Accepted Answer

Welding fumes depend on base metal, coating, filler metal, process, and ventilation. Inspectors should recognize when ventilation, respiratory protection, or special precautions are required.

Question 45

Confined Space Welding

Accepted Answer

Welding in confined spaces requires controls for atmosphere, ventilation, rescue, fire, and electrical hazards. Inspection work should not proceed until the required safety controls are in place.

Question 46

SMAW

Accepted Answer

Shielded Metal Arc Welding uses a flux-coated consumable electrode. The flux produces shielding and slag, making the process portable and common for field and repair welding.

Question 47

GMAW

Accepted Answer

Gas Metal Arc Welding uses a continuously fed consumable wire and external shielding gas. Inspectors watch for shielding problems, parameter control, transfer mode, and procedure compliance.

Question 48

GTAW

Accepted Answer

Gas Tungsten Arc Welding uses a nonconsumable tungsten electrode and separate filler metal when needed. It is valued for control and clean welds but usually has lower deposition speed.

Question 49

FCAW

Accepted Answer

Flux-Cored Arc Welding uses tubular wire containing flux. Some wires require external shielding gas, while self-shielded wires are useful where wind makes gas shielding difficult.

Question 50

SAW

Accepted Answer

Submerged Arc Welding forms the arc beneath granular flux. It is efficient for suitable joint positions and long welds, but the flux blanket and position limits affect inspection planning.

Free AWS CWI Exam Flashcards

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