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CWB Welding Inspector Level 1 practice questions

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Question 1Visual Welding Inspection Fundamentals

Which document normally specifies the acceptance criteria a visual welding inspector applies to a completed weld?

  1. The consumable manufacturer's catalogue
  2. The shop's general safety briefing
  3. The applicable welding code or project specification Correct answer.
  4. The welder's personal preference sheet

Explanation

Acceptance criteria come from the contractually applicable code, standard, or project specification, which defines the weld category and the allowable discontinuity sizes. The inspector compares measured conditions against those written limits rather than personal judgement. Consumable catalogues and safety documents do not establish weld acceptance limits.

Question 2Visual Welding Inspection Fundamentals

Before beginning a visual inspection of a completed weld, the inspector should confirm that the surface is:

  1. Wet with a penetrant developer
  2. Coated with a thin protective primer
  3. Free of slag, spatter, and dirt Correct answer.
  4. Still at the preheat temperature

Explanation

Visual inspection requires an unobstructed view of the weld and adjacent base metal, so slag, spatter, dirt, oil, and loose scale must be removed first. Surface coatings hide cracks and undercut and must be removed where inspection is required. Cleanliness of the surface is a precondition for reliable observation.

Question 3Visual Welding Inspection Fundamentals

A weld shows a shallow, smooth groove melted into the base metal along the weld toe. This condition is best described as:

  1. Undercut Correct answer.
  2. Arc strike
  3. Porosity
  4. Overlap

Explanation

Undercut is a groove melted into the base metal at the weld toe or root that remains unfilled by weld metal. It reduces the effective throat and creates a notch that concentrates stress. Overlap is excess weld metal lying on the surface without fusion, porosity is gas entrapment, and an arc strike is localized surface melting away from the weld.

Question 4Visual Welding Inspection Fundamentals

The primary purpose of a weld gauge such as an undercut or fillet gauge is to:

  1. Determine the preheat temperature
  2. Estimate the welding current used
  3. Measure the tensile strength of the joint
  4. Quantify the size of a discontinuity Correct answer.

Explanation

Weld gauges are dimensional tools used to measure features such as undercut depth, fillet leg length, throat thickness, and misalignment. The measured value is then compared with the acceptance limit in the applicable code. Gauges do not measure strength, current, or temperature.

Question 5Visual Welding Inspection Fundamentals

Which discontinuity is characterized by a linear, often branching indication that follows the weld axis or the fusion boundary and is usually associated with restraint and hydrogen?

  1. Slag inclusion
  2. Crack Correct answer.
  3. Spatter
  4. Lack of penetration

Explanation

Cracks are linear, sharp-tipped separations that may branch and are driven by restraint, hydrogen, or thermal stress. They are among the most serious discontinuities because they propagate under load. Slag inclusions are entrained nonmetallic material, lack of penetration is incomplete fusion at the root, and spatter is expelled metal droplets.

Question 6Visual Welding Inspection Fundamentals

An inspector is viewing a weld and reports that the fillet leg lengths are unequal. Which condition does this describe?

  1. Convexity
  2. Root concavity
  3. Weld toe blend
  4. Unequal leg fillet Correct answer.

Explanation

An unequal leg fillet has one leg longer than the other, so the weld is asymmetric about the joint. This changes the effective throat and load distribution compared with a equal-leg fillet of the same size. Convexity and concavity describe the profile of the weld face, not leg symmetry.

Question 7Visual Welding Inspection Fundamentals

Which of the following is a basic requirement for adequate visual inspection lighting?

  1. Coloured filters over the light source
  2. Enough illuminance at the weld surface for detail to be resolved Correct answer.
  3. Lighting directed only from directly above
  4. A dim background to increase contrast

Explanation

Visual inspection depends on sufficient illuminance at the surface being examined so that small discontinuities can be resolved. Codes and standards typically state minimum illumination values and viewing distances. Dim backgrounds, coloured filters, and fixed single-direction lighting can create shadows or false colour that reduce detection reliability.

Question 8Visual Welding Inspection Fundamentals

The heat-affected zone in a fusion weld is best described as:

  1. Slag trapped along the fusion line
  2. Base metal altered by welding heat without melting Correct answer.
  3. The region of spatter adjacent to the toe
  4. Weld metal diluted with base metal

Explanation

The heat-affected zone is base metal that has been metallurgically changed by the welding thermal cycle but has not melted. Its properties differ from both the weld metal and the unaffected base metal. Dilution describes mixing in the weld pool, and slag and spatter are separate conditions.

Question 9Visual Welding Inspection Fundamentals

During inspection of a fillet weld, the inspector measures a leg of 6 mm on a weld specified as 8 mm equal leg. What is the most appropriate action?

  1. Accept it if the weld looks smooth
  2. Reject it without recording the measurement
  3. Record the undersize and evaluate it against the acceptance criteria Correct answer.
  4. Accept it because fillet size is not a code item

Explanation

Fillet weld size is a specified dimension, and an undersized leg reduces the throat and load capacity. The inspector must document the measured value and compare it with the acceptance limits in the applicable code before deciding acceptance. Accepting on appearance alone or rejecting without documentation is not proper practice.

Question 10Visual Welding Inspection Fundamentals

An inspector finds scattered individual pores visible on the finished weld face. Which factor should be evaluated first when judging acceptability?

  1. The size, number, and distribution limits in the code Correct answer.
  2. The welder's certification date
  3. The ambient humidity at inspection
  4. The colour of the weld

Explanation

Surface porosity is judged against code limits on individual pore size, total quantity, and distribution within a stated length of weld. The inspector measures and counts indications and compares them with those limits. Colour, certification date, and humidity at the time of inspection do not set acceptance thresholds.

Question 11Visual Welding Inspection Fundamentals

A weld exhibits a sharp, deep toe notch with measured undercut of 1.2 mm in a butt weld where the code permits a maximum of 0.8 mm. What disposition is correct?

  1. Accept, because the depth is less than 2 mm
  2. Accept, because undercut is only cosmetic
  3. Reject or repair, because the measured depth exceeds the limit Correct answer.
  4. Accept, provided the weld is painted

Explanation

When a measured discontinuity exceeds the code limit, the weld does not meet acceptance criteria and must be repaired or rejected per the applicable procedure. The measurement, not appearance, governs the decision. Painting or a general tolerance unrelated to the code does not change the measured depth.

Question 12Visual Welding Inspection Fundamentals

Which condition would most likely be classified as a geometric discontinuity rather than a metallurgical one?

  1. Sigma phase formation
  2. Weld reinforcement that is excessive Correct answer.
  3. Grain growth in the heat-affected zone
  4. Hydrogen-induced cracking

Explanation

Geometric discontinuities relate to the shape and dimensions of the weld, such as excessive reinforcement, poor profile, misalignment, or undersize. Metallurgical discontinuities arise from changes in microstructure or composition, including cracking and harmful phase formation. Grain growth and sigma phase are metallurgical effects.

Question 13Visual Welding Inspection Fundamentals

An inspector observes that the weld face is convex and the toes blend smoothly, but the specified throat is not achieved. What is the key concern?

  1. The base metal will be undercut
  2. The weld will have excessive distortion
  3. The weld is stronger than required
  4. The joint may be understrength despite good appearance Correct answer.

Explanation

A smooth convex profile can look acceptable while the actual throat thickness is below the design requirement, reducing load capacity. Visual inspection must include dimensional checks, not appearance alone. Distortion and undercut are separate conditions not implied by the described profile.

Question 14Visual Welding Inspection Fundamentals

When is a weld most appropriately examined visually relative to the welding sequence?

  1. Only when a defect is suspected by production
  2. Only after the component has been in service
  3. Only after the final protective coating is applied
  4. At stages defined by the inspection and test plan, including before, during, and after welding Correct answer.

Explanation

Visual inspection is performed at defined hold points in the inspection and test plan, covering joint preparation and fit-up, in-process conditions, and the finished weld. Early checks catch conditions that later become hidden or costly to correct. Post-coating or in-service examination alone is too late for many conditions.

Question 15Visual Welding Inspection Fundamentals

A welder produces a weld with deep, irregular grooves along the fusion line filled with dark nonmetallic material. Which discontinuity is most consistent with this description?

  1. Spatter
  2. Slag inclusion Correct answer.
  3. Porosity
  4. Crater pipe

Explanation

Slag inclusion appears as entrained nonmetallic material, often as elongated or irregular dark lines along the fusion boundary or between passes. It results from incomplete removal of slag between passes or from poor manipulation. Porosity is rounded gas pockets, spatter is surface metal droplets, and a crater pipe is a shrinkage cavity at the weld end.

Question 16Visual Welding Inspection Fundamentals

Why must an inspector examine both the weld face and the weld root where access permits?

  1. The root is always the strongest region
  2. The root side determines the weld colour
  3. Discontinuities such as lack of penetration may be visible only from the root side Correct answer.
  4. Code requires the root to be ground flush in all cases

Explanation

Root-side examination can reveal lack of penetration, incomplete fusion, root concavity, or suck-back that is not visible from the face. Conditions on the root affect joint integrity, particularly in single-sided welds. Grinding the root flush is not a universal requirement, and colour and strength are not the reason for examining both sides.

Question 17Visual Welding Inspection Fundamentals

An inspector must judge whether a small amount of scattered spatter on the base metal is acceptable. Which approach is most defensible?

  1. Reject the entire weld regardless of specification
  2. Compare it with the specification's limits for spatter and surface condition Correct answer.
  3. Accept it if it can be removed by light wire brushing
  4. Accept it because spatter never affects service

Explanation

Spatter acceptance depends on the project specification, which may limit spatter size, quantity, or location, particularly where coatings or fatigue resistance matter. The inspector should measure and compare against those stated limits. Personal judgement about brushing or blanket rejection is not a substitute for the specification.

Question 18Visual Welding Inspection Fundamentals

A butt weld shows a slight cap height above the base metal surface, and the code permits reinforcement up to a stated maximum. What should the inspector do?

  1. Accept it only if the weld is painted
  2. Reject it because any reinforcement is a defect
  3. Grind it flush without measuring
  4. Accept it if the measured height is within the permitted maximum Correct answer.

Explanation

Controlled reinforcement is permitted within code limits because it does not reduce the required section and may be acceptable for the application. The inspector measures the cap height and compares it with the stated maximum. Rejecting all reinforcement or grinding without measurement is not justified by the code.

Question 19Visual Welding Inspection Fundamentals

Which set of conditions most strongly suggests that a visual indication is a crack rather than a scratch?

  1. Rounded ends, uniform width, and no branching
  2. Smooth surface with parallel tool marks
  3. Sharp irregular path, branching, and origin at a stress concentration Correct answer.
  4. Isolated round depression with a bright base

Explanation

Cracks typically follow an irregular, sharp path, may branch, and often originate at stress concentrations such as weld toes or craters. Scratches tend to be straight, uniform in width, and mechanical in origin. Round depressions suggest porosity or arc strikes rather than cracks.

Question 20Visual Welding Inspection Fundamentals

An inspector notes that a fillet weld has a concave profile with a throat thinner than the specified size, although the leg lengths appear to meet the drawing. What is the most likely explanation?

  1. The base metal was preheated excessively
  2. The weld face was dressed or the profile is excessively concave, reducing throat Correct answer.
  3. The weld was made with excessive current only
  4. The weld was made with a backing strip

Explanation

Throat thickness is measured perpendicular to the weld axis from the root to the face, so a concave face reduces throat even when leg lengths are correct. Dressing or a naturally concave profile can produce this condition. Current, preheat, and backing do not by themselves explain reduced throat with correct legs.

Question 21Visual Welding Inspection Fundamentals

A visual inspection reveals a linear indication at the toe of a weld in a highly restrained joint. The indication is sharp and does not disappear after light grinding. What is the most appropriate interpretation?

  1. It is surface porosity and can be ignored
  2. It is likely a crack and requires further evaluation and repair Correct answer.
  3. It is spatter and should be wire brushed
  4. It is acceptable because it is at the toe

Explanation

A sharp linear indication that persists after light grinding at a restrained joint toe is highly suggestive of cracking, which is generally unacceptable and requires further evaluation. Cracks can propagate and must be characterized before repair. Porosity, spatter, and toe location do not explain a persistent sharp linear indication.

Question 22Visual Welding Inspection Fundamentals

An inspector compares two welds of equal leg length, one convex and one concave. Which statement about their load-carrying behaviour is most accurate?

  1. Both have identical throat regardless of profile
  2. The concave weld is always stronger because it is smoother
  3. The convex weld always has a smaller throat
  4. The concave weld has a smaller effective throat and may be weaker Correct answer.

Explanation

Effective throat is measured from the root to the face, so a concave profile reduces throat compared with a flat or convex profile of the same leg length. Reduced throat lowers the weld's load capacity. Smoothness alone does not increase strength, and profile changes do affect throat.

Question 23Visual Welding Inspection Fundamentals

An inspector is asked to verify that a completed weld meets a specified 3 mm maximum mismatch. Which action best demonstrates correct practice?

  1. Compare the weld colour on each side
  2. Estimate the mismatch by eye from a distance
  3. Measure the offset with an appropriate gauge and record the value Correct answer.
  4. Ask the welder whether the fit-up was correct

Explanation

Mismatch is a dimensional condition that must be measured with a suitable gauge, such as a hi-lo or alignment gauge, and recorded against the specified limit. Eyeball estimates and colour comparisons are not reliable for millimetre tolerances. The welder's statement does not substitute for measurement.

Question 24Visual Welding Inspection Fundamentals

Which observation would most likely indicate that a weld was made with insufficient heat input, based on visual appearance alone?

  1. Bright blue heat tint across the weld
  2. Narrow, high-crowned bead with poor toe wetting Correct answer.
  3. Uniform spatter pattern
  4. Wide, flat, smooth bead with deep penetration

Explanation

Low heat input tends to produce a narrow, high-crowned bead with poor fusion at the toes and limited penetration. A wide flat bead with good wetting generally indicates adequate or high heat input. Spatter pattern and heat tint alone are not reliable indicators of heat input.

Question 25Visual Welding Inspection Fundamentals

During a final visual inspection, an inspector finds that a previously accepted weld now shows a fresh, bright arc strike on the base metal near the weld. What is the correct interpretation?

  1. It is evidence of adequate preheat
  2. It is a cosmetic mark that can be ignored
  3. It is a localized thermal discontinuity that should be evaluated and documented Correct answer.
  4. It is a slag inclusion from the welding process

Explanation

An arc strike is a localized area of base metal melted by an arc outside the intended weld, producing a hard, potentially cracked heat-affected zone. It should be documented and evaluated against the specification, and often removed or repaired. It is not cosmetic, not slag, and not evidence of preheat.

Question 26Visual Welding Inspection Fundamentals

Which tool is most appropriate for checking the alignment of two plate surfaces across a completed butt weld?

  1. A magnifying glass and a weld gauge for fillet size
  2. A hardness tester and a thermometer
  3. A straightedge and a taper gauge or feeler gauge Correct answer.
  4. A torque wrench and a caliper

Explanation

Surface alignment or mismatch is measured by bridging the joint with a straightedge and measuring any step with a taper or feeler gauge. This directly quantifies the height difference between the two plate surfaces. Hardness and torque tools do not measure geometry.

Question 27Visual Welding Inspection Fundamentals

Before beginning visual inspection of a newly completed weld, what is the most important preparatory step for the inspector?

  1. Preheating the weld to a specified temperature
  2. Confirming the weld and adjacent base metal are clean and free of slag, spatter, and debris Correct answer.
  3. Applying a penetrant to the weld surface
  4. Painting the weld to protect it from corrosion

Explanation

Visual inspection requires an unobstructed view of the actual weld surface, so slag, spatter, flux residue, and dirt must be removed first. Surface contamination can hide or mimic discontinuities. Penetrant, paint, and preheat are unrelated or would interfere with the examination.

Question 28Visual Welding Inspection Fundamentals

What does a weld symbol placed on the reference line with the arrow pointing to the joint side indicate about where the weld is to be made?

  1. The weld is to be placed on the arrow side of the joint Correct answer.
  2. The weld is a temporary tack only
  3. The weld is to be made on both sides regardless of symbol position
  4. The weld is to be placed on the other side of the joint

Explanation

On a standard welding symbol, a symbol drawn on the reference line below the line denotes the arrow side, and above the line denotes the other side. The arrow points to the joint member to be prepared or welded. This convention tells the welder which face receives the weld.

Question 29Visual Welding Inspection Fundamentals

A weld bead shows a uniform, fine, closely spaced ripple pattern with smooth toes. Which interpretation is most reasonable?

  1. The bead was probably made with excessive current and burned through
  2. The bead likely suffered from arc blow and erratic deposition
  3. The bead likely had stable arc conditions and acceptable travel consistency Correct answer.
  4. The bead likely contains extensive internal porosity

Explanation

Evenly spaced, regular ripples with smooth blending generally reflect a steady arc, consistent travel speed, and good manipulation. Irregular ripple spacing or ragged toes would suggest instability. Visual appearance alone cannot confirm internal soundness, but uniform ripples are a favorable sign.

Question 30Visual Welding Inspection Fundamentals

Which visual feature is the primary indicator of a weld's leg size on a fillet weld?

  1. The depth of penetration into the root gap
  2. The distance from the weld toe to the root along the fusion face Correct answer.
  3. The height of the reinforcement above the base metal
  4. The width of the heat-affected zone

Explanation

Fillet leg size is the length of the fusion face measured from the toe to the root of the joint along the base metal surface. It defines the size of the triangular fillet cross-section. Reinforcement height and heat-affected zone width are different attributes.

Question 31Visual Welding Inspection Fundamentals

An inspector observes a weld that is narrower at the top than at the root, with steeply sloped sides. What term best describes this profile?

  1. A convex bead with high crown
  2. An underfilled bead below the surface
  3. A wide, flat bead with good tie-in
  4. A narrow, steep-sided bead with poor tie-in Correct answer.

Explanation

A bead that is narrow at the cap and steep-sided indicates limited width and poor blending into the base metal at the toes. This profile concentrates stress at the toe and can indicate improper technique or current. It is distinct from a wide, flat, or convex bead.

Question 32Visual Welding Inspection Fundamentals

Which of the following best describes the purpose of a visual inspection checklist during fabrication?

  1. To establish the welding procedure specification independently
  2. To ensure consistent, documented verification of required attributes at defined stages Correct answer.
  3. To replace the need for any measuring instruments
  4. To certify the welder's qualification without further testing

Explanation

A checklist provides a structured, repeatable record that each required attribute is checked at the proper stage and that results are documented. It supports consistency and traceability. It does not substitute for instruments, welder qualification, or procedure development.

Question 33Visual Welding Inspection Fundamentals

What is the main reason an inspector records the location and size of a discontinuity on a weld?

  1. To determine the welder's hourly rate
  2. To decide the preheat temperature for future welds
  3. To calculate the cost of the base metal
  4. To allow evaluation against acceptance criteria and to support traceability if repair is needed Correct answer.

Explanation

Recording location and size allows the inspector to judge the indication against the applicable acceptance criteria and to document findings. It also supports later repair, re-inspection, and traceability. It has no bearing on wages, base metal cost, or preheat selection.

Question 34Visual Welding Inspection Fundamentals

An inspector measures a fillet weld throat that is smaller than the leg-based theoretical throat, and the profile is distinctly concave. What is the most likely consequence?

  1. The weld will be immune to toe cracking
  2. The weld may not carry the design load assumed for the specified fillet size Correct answer.
  3. The weld will have higher toughness than a convex weld
  4. The weld will have a larger effective throat than specified

Explanation

A concave profile reduces the actual throat below the theoretical throat of an equal-leg fillet, lowering the effective load-bearing area. The design assumes a throat based on the specified size, so a reduced throat can compromise strength. Concavity is therefore evaluated against acceptance criteria.

Question 35Visual Welding Inspection Fundamentals

A butt weld cap shows a slight crown above the base metal, but the crown exceeds the maximum reinforcement allowed by the applicable code. How should the inspector treat this?

  1. Accept it because any reinforcement improves strength
  2. Accept it because crown height is never specified
  3. Reject the entire base metal as defective
  4. Record it as a nonconforming condition requiring evaluation or repair per the code Correct answer.

Explanation

Excessive reinforcement is a code-controlled attribute because a high crown concentrates stress at the toes and can mask lack of fusion. If the measured crown exceeds the permitted maximum, the weld is nonconforming and must be handled per the code, often by grinding. Acceptance is not automatic.

Question 36Visual Welding Inspection Fundamentals

An inspector finds that the weld toes blend smoothly into the base metal with no visible notch, but the weld shows a slightly low cap. Which attribute should the inspector verify next against the specification?

  1. Whether the heat-affected zone is wider than the base metal
  2. Whether the arc voltage was recorded correctly
  3. Whether the ripple spacing exceeds the maximum allowed
  4. Whether the cap height meets the minimum required fill or flushness Correct answer.

Explanation

A low cap may indicate underfill, which is a dimensional acceptance issue distinct from toe blending. The inspector should measure fill against the specified minimum or flushness requirement. Ripple spacing, heat-affected zone width, and voltage records are not the governing acceptance attributes here.

Question 37Visual Welding Inspection Fundamentals

An inspector sees a series of small, rounded depressions along the weld face that are open to the surface and have smooth interior walls. These most likely represent:

  1. Lack of fusion at the root
  2. Slag inclusions trapped below the surface
  3. Surface porosity or pitting exposed at the weld face Correct answer.
  4. A crack propagating from the toe

Explanation

Small rounded surface depressions with smooth interiors are characteristic of exposed porosity or pitting at the weld face. They differ from planar lack of fusion, subsurface slag, and sharp crack indications. The inspector should record their size and distribution for evaluation.

Question 38Visual Welding Inspection Fundamentals

A weld exhibits a linear indication running parallel to the weld axis along the toe, with a sharp edge and slight branching. What should the inspector do first?

  1. Classify it as spatter and ignore it
  2. Dismiss it as a scratch from handling
  3. Assume it is a slag line and accept the weld
  4. Treat it as a suspected crack and evaluate it with appropriate follow-up examination Correct answer.

Explanation

A sharp, linear, branching indication at the toe is highly suspicious for a crack, especially in restrained joints. The inspector should not dismiss it and should use appropriate follow-up examination to confirm its nature and extent. Only then can acceptance be judged.

Question 39Visual Welding Inspection Fundamentals

During inspection, an inspector notices that the weld metal surface is rough and has a coarse, rope-like appearance with irregular ripples. Which process condition is most likely indicated?

  1. Excessive post-weld heat treatment
  2. Excessively high preheat
  3. Insufficient base metal thickness
  4. Unstable arc or inconsistent travel and manipulation Correct answer.

Explanation

Coarse, irregular, rope-like beads usually reflect arc instability, inconsistent travel speed, or poor manipulation. These conditions affect bead shape and ripple regularity. Preheat, post-weld heat treatment, and base metal thickness do not directly produce this surface pattern.

Question 40Visual Welding Inspection Fundamentals

An inspector is checking a completed fillet weld for size using a fillet weld gauge. The gauge shows the weld is smaller than the specified size. What is the correct interpretation?

  1. The weld size is acceptable because gauges only check profile
  2. The weld is oversized and acceptable
  3. The weld is undersized and should be evaluated against the acceptance criteria Correct answer.
  4. The gauge is faulty because fillet welds cannot be undersized

Explanation

A fillet weld gauge directly compares the weld leg or throat to the specified size. If the weld is smaller than specified, it is undersized and must be evaluated against the applicable acceptance criteria. The gauge is designed for this measurement and is not limited to profile checking.

Question 41Visual Welding Inspection Fundamentals

What is the significance of examining the weld root on a partial-joint-penetration groove weld where access is available?

  1. It can reveal lack of penetration, root concavity, or burn-through not visible from the face Correct answer.
  2. It measures the heat-affected zone width
  3. It verifies the base metal chemistry
  4. It confirms the weld cap height on the opposite side

Explanation

The root region is where lack of penetration, root concavity, suck-back, and burn-through commonly occur, and these may be invisible from the face. Root examination provides information the face cannot show. It does not measure cap height, heat-affected zone width, or chemistry.

Question 42Visual Welding Inspection Fundamentals

An inspector observes that the weld metal overlaps the base metal at the toe without fusing to it, forming a distinct ledge. What condition is this?

  1. An overlap or rollover defect at the toe Correct answer.
  2. A crater crack at the weld termination
  3. A gas pore at the weld face
  4. A slag inclusion along the fusion line

Explanation

Overlap occurs when molten weld metal flows onto the base metal without fusing, leaving a ledge at the toe. It is a fusion-related geometric defect that concentrates stress. Crater cracks, slag inclusions, and gas pores have different appearances and locations.

Question 43Visual Welding Inspection Fundamentals

Which visual characteristic most strongly suggests that a weld was made with excessive travel speed?

  1. A uniform bead with fine, closely spaced ripples
  2. A convex bead with a high crown and good wetting
  3. A wide, flat bead with deep penetration
  4. A narrow, peaked bead with poor toe wetting and possible undercut Correct answer.

Explanation

Excessive travel speed reduces heat input per unit length, producing a narrow, peaked bead with poor wetting and a tendency to undercut at the toes. Wide flat beads and deep penetration generally reflect slower travel or higher heat input. Uniform fine ripples indicate stable conditions.

Question 44Visual Welding Inspection Fundamentals

An inspector is reviewing a weld that shows a dark, elongated, slightly raised line along the fusion boundary that does not follow the bead ripple pattern. What is the most appropriate first action?

  1. Examine it closely and consider follow-up methods to determine whether it is slag, lack of fusion, or a crack Correct answer.
  2. Grind it away and accept the weld without further evaluation
  3. Record it as spatter and take no further action
  4. Accept it because it is slightly raised

Explanation

An elongated indication along the fusion boundary that does not follow the ripple pattern may be slag, lack of fusion, or a crack, and these have very different acceptance implications. Close examination and appropriate follow-up are needed before a disposition. Grinding away without evaluation loses information and may leave an unacceptable condition.

Question 45Visual Welding Inspection Fundamentals

What does a weld symbol with a triangle placed above the reference line and an arrow pointing to a T-joint indicate about the weld location?

  1. A spot weld at the joint intersection
  2. A groove weld on the arrow side of the joint
  3. A fillet weld on the other side of the joint from the arrow Correct answer.
  4. A fillet weld on the arrow side of the joint

Explanation

On a standard welding symbol, a symbol above the reference line denotes the other side of the joint, while a symbol below denotes the arrow side. A triangle denotes a fillet weld. Therefore the symbol indicates a fillet weld on the other side.

Question 46Visual Welding Inspection Fundamentals

A weld cap is measured and found to be flush with the base metal surface over its full length, with no underfill. How should the inspector interpret this result?

  1. The weld is automatically rejected because reinforcement is required
  2. The weld is oversized and must be ground down
  3. The weld indicates lack of fusion at the root
  4. The fill meets a flushness requirement, and the weld should be checked for other attributes Correct answer.

Explanation

A flush cap can satisfy a specification that requires flushness or permits zero reinforcement, so the fill itself is not a defect. The inspector must still verify the remaining attributes, such as toe blending, undercut, and profile. Flushness does not by itself indicate root lack of fusion or oversizing.

Question 47Visual Welding Inspection Fundamentals

An inspector observes a weld where the arc has wandered and the bead is skewed to one side of the joint, with uneven leg lengths on a fillet. Which condition most likely caused this?

  1. Improper post-weld cleaning
  2. Excessive preheat of the base metal
  3. Incorrect base metal certification
  4. Arc blow or magnetic deflection during welding Correct answer.

Explanation

Arc blow, caused by magnetic forces especially in ferromagnetic materials or at corners, deflects the arc and produces a skewed bead with uneven legs. Preheat, cleaning, and certification do not cause the arc to wander. The inspector should recognize this pattern as a process condition.

Question 48Visual Welding Inspection Fundamentals

Two welds have the same leg length, but one has a convex profile and the other a concave profile. Which statement about their effective throats is correct?

  1. The convex weld has a smaller effective throat than the concave weld
  2. The concave weld has a larger effective throat than the convex weld
  3. Both welds have identical effective throats regardless of profile
  4. The convex weld has a throat at least equal to the theoretical throat, while the concave weld has a reduced throat Correct answer.

Explanation

For equal leg length, a convex profile keeps the throat at or above the theoretical throat, while a concave profile removes material and reduces the throat below the theoretical value. This affects the load-bearing area. Profile therefore matters even when leg length is the same.

Question 49Visual Welding Inspection Fundamentals

An inspector finds a shallow, smooth-bottomed groove along the toe of a fillet weld, with the base metal visibly melted away and the groove continuous over a short length. Which condition is this, and why does it matter?

  1. Porosity, which is a rounded internal cavity
  2. Undercut, which reduces the base metal section and concentrates stress at the toe Correct answer.
  3. Spatter, which is only a cosmetic surface condition
  4. Overlap, which adds extra base metal section at the toe

Explanation

Undercut is the melting away of base metal at the toe without filler replacement, creating a groove that reduces the effective section and concentrates stress. Its depth and continuity are evaluated against acceptance limits. Overlap adds metal, spatter is surface droplets, and porosity is a cavity.

Question 50Visual Welding Inspection Fundamentals

An inspector is asked to determine whether a visible linear indication near a weld toe is a crack or a surface scratch. Which combination of observations best supports a crack?

  1. Rounded ends, uniform width, and confinement to the weld cap only
  2. A bright reflective surface with no depth under oblique light
  3. A shallow depression with smooth walls and no branching
  4. Sharp edges, branching, and propagation beyond the weld toe into the base metal Correct answer.

Explanation

Cracks typically have sharp edges, may branch, and can propagate from the toe into the base metal or heat-affected zone. Scratches tend to have rounded ends, uniform width, and no branching. Observing propagation and branching therefore supports a crack diagnosis.