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Cert III Welding study materials
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Cert III Welding practice questions

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Question 1Workplace Safety, Health and Environment (WHS)

Which document should a welder consult first to find the hazards and required controls for a specific welding task in their workplace?

  1. The welder's trade certificate
  2. The company's annual financial report
  3. The safe work method statement for that task Correct answer.
  4. The manufacturer's invoice for the welding machine

Explanation

A safe work method statement (or job safety analysis) sets out the hazards of a specific task and the controls required before work starts. It is the primary task-level document a welder checks, and it should be reviewed with the supervisor when conditions change.

Question 2Workplace Safety, Health and Environment (WHS)

What is the main purpose of wearing a welding helmet with an appropriate filter shade?

  1. To keep the welder's head warm in cold workshops
  2. To improve the welder's view of the arc
  3. To protect the eyes and face from radiation, sparks and spatter Correct answer.
  4. To filter out toxic fumes from the breathing zone

Explanation

A welding helmet with the correct filter shade shields the eyes and face from ultraviolet and infrared radiation, intense visible light, sparks and spatter. The shade number must suit the process and current so the arc is comfortable to view.

Question 3Workplace Safety, Health and Environment (WHS)

A welder notices sparks landing on a nearby drum labelled as containing a flammable solvent. What is the most appropriate immediate action?

  1. Continue welding and check the drum afterwards
  2. Ask another welder to watch the drum while work continues
  3. Stop welding and move or isolate the drum before restarting Correct answer.
  4. Continue welding but turn up the extraction fan

Explanation

Sparks and hot slag are ignition sources, so welding must stop until flammable materials are removed or protected by fire-resistant barriers. Continuing work near a labelled flammable container creates an unacceptable fire and explosion risk.

Question 4Workplace Safety, Health and Environment (WHS)

What does the hazard pictogram for a corrosive substance on a chemical drum indicate?

  1. The substance is only hazardous if swallowed
  2. The substance is a compressed gas
  3. The substance is safe to handle without gloves
  4. The substance can damage skin, eyes and metal surfaces on contact Correct answer.

Explanation

The corrosive pictogram warns that the substance attacks living tissue and can corrode metals, so appropriate gloves, eye protection and handling procedures are required. Contact with skin or eyes can cause serious chemical burns.

Question 5Workplace Safety, Health and Environment (WHS)

Which type of fire extinguisher is suitable for a fire involving flammable liquids such as solvents or fuel?

  1. Foam or dry chemical extinguisher Correct answer.
  2. Wet chemical extinguisher
  3. Water extinguisher
  4. Carbon dioxide extinguisher only for cooking oils

Explanation

Class B fires involve flammable liquids, and foam or dry chemical extinguishers are designed to smother or inhibit them. Water can spread burning liquid and must not be used on this class of fire.

Question 6Workplace Safety, Health and Environment (WHS)

Why should welding cables be inspected before each use?

  1. Cables must be coiled tightly to keep the work area tidy
  2. Inspection makes the cable last longer by stretching it
  3. Damaged insulation can expose live conductors and cause electric shock Correct answer.
  4. Cables become heavier when warm and are hard to lift

Explanation

Cracked or worn insulation on welding cables can expose live parts and lead to electric shock or arcing. A pre-use inspection lets the welder remove damaged leads from service before work begins.

Question 7Workplace Safety, Health and Environment (WHS)

What should a welder do with a hot workpiece immediately after finishing a weld?

  1. Pick it up with bare hands to check the temperature
  2. Leave it unmarked because it will cool on its own
  3. Pour cold water on it while standing over it
  4. Mark it clearly as hot and allow it to cool before handling Correct answer.

Explanation

Hot metal looks the same as cold metal, so workpieces must be marked or barricaded until they cool to a safe temperature. This prevents burns to the welder and to others who may pass or work nearby.

Question 8Workplace Safety, Health and Environment (WHS)

When should a welder use a welding fume extraction system or approved respiratory protection?

  1. Only when welding galvanised steel
  2. Only when welding for more than eight hours
  3. Whenever welding generates fume in an area without adequate ventilation Correct answer.
  4. Only when a supervisor is watching

Explanation

All welding fume is a health hazard, so exposure must be controlled by ventilation or respiratory protection whenever fume is generated in an enclosed or poorly ventilated area. Controls are chosen from the risk assessment, not from the length of the shift or supervision.

Question 9Workplace Safety, Health and Environment (WHS)

A welder is working alone in a confined space and begins to feel dizzy. What is the correct action?

  1. Remove the helmet to get more air
  2. Increase the welding current to finish faster
  3. Exit the space immediately and raise the alarm Correct answer.
  4. Sit down and rest until the feeling passes

Explanation

Dizziness in a confined space can signal oxygen deficiency or exposure to toxic gases, which can rapidly progress to unconsciousness. The welder must leave the space at once and follow the emergency procedure, and no rescue should be attempted without proper equipment.

Question 10Workplace Safety, Health and Environment (WHS)

Why is welding galvanised steel particularly hazardous without adequate controls?

  1. The coating prevents the arc from starting
  2. The coating releases oxygen into the workspace
  3. The zinc coating produces metal fume that can cause metal fume fever Correct answer.
  4. The coating makes the steel too hard to weld

Explanation

Welding galvanised steel vaporises the zinc coating and produces zinc oxide fume, which can cause metal fume fever with flu-like symptoms. Local exhaust ventilation and appropriate respiratory protection are needed, and the coating is often removed from the weld zone first.

Question 11Workplace Safety, Health and Environment (WHS)

What is the purpose of a fire watch during and after hot work?

  1. To detect and control fires that may start from sparks and slag Correct answer.
  2. To operate the welding machine while the welder rests
  3. To record the welder's start and finish times
  4. To supervise the quality of the weld bead

Explanation

A fire watch observes the work area for ignition during hot work and for a set period afterwards, because smouldering materials can ignite well after welding stops. The watcher must have extinguishing equipment and a means to raise the alarm.

Question 12Workplace Safety, Health and Environment (WHS)

Which control measure ranks highest in the hierarchy of risk control for welding fume?

  1. Placing a warning sign near the work area
  2. Issuing a respirator to each welder
  3. Eliminating the fume source by using a different process or method Correct answer.
  4. Rotating welders so each works shorter periods

Explanation

The hierarchy of control places elimination and substitution above engineering, administrative and personal protective measures. Removing or replacing the fume-generating process protects everyone without relying on individual behaviour or equipment fit.

Question 13Workplace Safety, Health and Environment (WHS)

A welder must use a grinder to prepare a joint. Which combination of personal protective equipment is most appropriate?

  1. Safety glasses alone
  2. Face shield over safety glasses, hearing protection and a dust mask Correct answer.
  3. A welding helmet with a shade 10 filter
  4. Earplugs and cotton gloves only

Explanation

Grinding produces flying particles, noise and dust, so the eyes and face need a face shield over safety glasses, along with hearing protection and respiratory protection for dust. A welding helmet is not designed for grinding and offers poor impact protection.

Question 14Workplace Safety, Health and Environment (WHS)

What is the correct way to move a compressed gas cylinder short distances on a site?

  1. Roll it on its base while holding the valve
  2. Secure it upright on a suitable trolley with the valve closed and cap fitted Correct answer.
  3. Carry it over the shoulder with the regulator attached
  4. Drag it by the hose with the regulator removed

Explanation

Cylinders must be moved upright and secured on a trolley or cylinder cart, with the valve closed and the protective cap fitted to protect the valve from impact. Rolling, dragging or carrying cylinders risks valve damage and a violent release of gas.

Question 15Workplace Safety, Health and Environment (WHS)

A welder is about to weld inside a tank that previously held fuel. What must happen before hot work begins?

  1. The tank must be filled with water to the weld line
  2. The welder must wear a dust mask and start welding
  3. The tank must be ventilated for five minutes with the hatch open
  4. The tank must be cleaned, purged and tested to confirm a safe atmosphere Correct answer.

Explanation

Confined spaces that held fuel can contain flammable vapour or lack oxygen, so they must be isolated, cleaned, purged and tested before entry or hot work. A documented entry permit and atmospheric monitoring are normally required.

Question 16Workplace Safety, Health and Environment (WHS)

What is the main risk of wearing clothing with frayed cuffs or open pockets while welding?

  1. The clothing will melt onto the electrode
  2. The clothing will increase fume production
  3. Sparks and slag can be trapped and cause burns Correct answer.
  4. The clothing will conduct the welding current

Explanation

Frayed cuffs, open pockets and torn seams can catch and hold hot sparks and slag against the skin, causing serious burns. Flame-resistant clothing should be worn in good repair with cuffs and pockets closed.

Question 17Workplace Safety, Health and Environment (WHS)

What is the first step in responding to a small fire that has just started in a welding area?

  1. Open all windows to let the smoke out
  2. Raise the alarm and evacuate if the fire cannot be safely controlled Correct answer.
  3. Fetch water from a nearby tap
  4. Continue welding while watching the fire

Explanation

The first priority is to raise the alarm so others can respond and evacuate, then to attack the fire only if it is small, safe to do so and the correct extinguisher is available. Personal safety and warning others always come before firefighting attempts.

Question 18Workplace Safety, Health and Environment (WHS)

Which health effect is most strongly associated with long-term exposure to welding fume containing manganese?

  1. Permanent hearing loss
  2. Neurological effects resembling Parkinsonism Correct answer.
  3. Loss of colour vision
  4. Skin cancer from ultraviolet exposure

Explanation

Manganese in welding fume is linked to neurological effects that resemble Parkinsonism after prolonged overexposure. Fume must be controlled through ventilation and respiratory protection to keep exposure well below workplace limits.

Question 19Workplace Safety, Health and Environment (WHS)

A welder is working in an area where another worker is using a solvent-based paint. Why is this a concern?

  1. The paint will protect the welder from fume
  2. Ultraviolet radiation and heat can break down solvents into harmful gases Correct answer.
  3. The paint will make the welding arc unstable
  4. The solvent will improve the weld penetration

Explanation

Ultraviolet radiation and heat from the arc can decompose chlorinated solvents and other paint vapours into harmful gases such as phosgene. Welding and solvent work should be separated or ventilated so the vapours are removed before welding starts.

Question 20Workplace Safety, Health and Environment (WHS)

What should be checked about a welding machine's earth return before work begins?

  1. The return lead is disconnected to reduce current
  2. The return clamp is attached to a painted surface
  3. The return clamp is securely connected to clean bare metal close to the work Correct answer.
  4. The return cable is coiled around the gas cylinder

Explanation

A poor return connection forces current to find other paths, which can cause arcing, overheating and electric shock. The clamp should be attached to clean bare metal on the workpiece as close as practicable to the weld.

Question 21Workplace Safety, Health and Environment (WHS)

A welder has been exposed to welding fume all shift and develops headache, nausea and a metallic taste. What do these symptoms most likely indicate?

  1. Carbon monoxide poisoning from the shielding gas
  2. Metal fume fever from zinc or other metal oxide fume Correct answer.
  3. Noise-induced hearing damage
  4. Ultraviolet radiation burn to the eyes

Explanation

Headache, nausea, thirst and a metallic taste after welding, especially of galvanised steel, are classic signs of metal fume fever. The welder should leave the fume area, report the symptoms and be assessed, and controls must be improved.

Question 22Workplace Safety, Health and Environment (WHS)

Why is it unsafe to use oxygen from a compressed gas cylinder to blow dust off clothing or workpieces?

  1. Oxygen removes dust from the air too quickly
  2. Oxygen-rich atmospheres make clothing and materials burn fiercely Correct answer.
  3. Oxygen has a strong smell that causes headaches
  4. Oxygen cylinders are too heavy to move safely

Explanation

Oxygen is not a fuel, but it greatly accelerates combustion, so clothing or hair saturated with oxygen can ignite violently from a small spark. Compressed air or a vacuum should be used for cleaning, never oxygen.

Question 23Workplace Safety, Health and Environment (WHS)

During a risk assessment for a welding job, which factor most directly determines the required filter shade number?

  1. The length of the welder's shift
  2. The colour of the workpiece
  3. The welding process and the current being used Correct answer.
  4. The diameter of the electrode packaging

Explanation

Filter shade selection depends mainly on the welding process and the arc current, with higher currents needing darker shades. Other factors such as overhead work or long arc viewing may require a higher shade than the minimum.

Question 24Workplace Safety, Health and Environment (WHS)

A welder is asked to weld on a steel platform near live overhead power lines. What is the most appropriate control?

  1. Ask a colleague to watch the lines during welding
  2. Lower the welding current to reduce the risk
  3. Wear rubber gloves and proceed carefully
  4. Isolate or de-energise the lines, or maintain the required exclusion distance Correct answer.

Explanation

The preferred control is to have the lines de-energised and isolated, or to maintain the safe approach distance specified for the voltage involved. Rubber gloves and reduced current do not protect against contact with high-voltage lines.

Question 25Workplace Safety, Health and Environment (WHS)

What is the key reason for isolating and locking out a welding machine before performing maintenance on it?

  1. To prevent accidental energisation while a person is working on the equipment Correct answer.
  2. To keep the machine clean during maintenance
  3. To allow the machine to cool faster
  4. To reduce electricity costs during maintenance

Explanation

Lockout and tagout isolate the energy source and prevent another person from switching the machine on while it is being serviced. The person performing the work should apply their own lock and verify isolation before starting.

Question 26Workplace Safety, Health and Environment (WHS)

Before starting a welding task, what is the primary purpose of a pre-start safety check of the work area?

  1. To measure the thickness of the material to be joined
  2. To record the welder's qualification number in the site diary
  3. To identify and control hazards before anyone is exposed to them Correct answer.
  4. To confirm the correct filter shade has been fitted to the helmet

Explanation

A pre-start check is a proactive step in which the welder and supervisor look for hazards such as flammable materials, poor ventilation, damaged leads and trip hazards, then put controls in place. The aim is to eliminate or reduce risk before work begins, rather than reacting after an incident. It is a core part of the duty to manage workplace health and safety.

Question 27Workplace Safety, Health and Environment (WHS)

What does the term 'hierarchy of control' mean when managing welding hazards?

  1. The order in which PPE items are put on before welding
  2. A ranking of controls from most to least reliable at reducing risk Correct answer.
  3. The sequence of steps used to shut down a welding machine
  4. The list of penalties applied for breaching site safety rules

Explanation

The hierarchy of control ranks risk controls by how reliably they reduce risk, starting with eliminating the hazard and moving down through substitution, engineering controls, administrative controls and finally PPE. Higher-order controls protect everyone in the area and do not depend on individual behaviour. PPE is the least reliable and is used as a last line of defence.

Question 28Workplace Safety, Health and Environment (WHS)

A welder notices the insulation on the electrode holder is cracked and a small section of live metal is exposed. What is the most appropriate immediate action?

  1. Reduce the welding current so the exposed part is less dangerous
  2. Continue welding but wear two pairs of gloves for extra protection
  3. Stop work, tag the equipment out of service and report the defect Correct answer.
  4. Wrap the cracked area with electrical tape and continue welding

Explanation

Damaged insulation on an electrode holder exposes the welder to electric shock, so the equipment must be taken out of service, tagged and reported for repair or replacement. Continuing to use faulty electrical equipment, even with improvised repairs, keeps a serious shock hazard in place. Only a competent person should repair or replace the holder.

Question 29Workplace Safety, Health and Environment (WHS)

A welder finishes a shift and removes a disposable particulate respirator. Which practice best maintains its protective performance for reuse?

  1. Store it loose in a pocket with gloves and tools
  2. Hang it by the straps in a clean, dry, dust-free place Correct answer.
  3. Place it on the bench beside the grinder for the next shift
  4. Seal it in a plastic bag while it is still damp from breath

Explanation

A respirator should be stored so it keeps its shape and stays clean, dry and free of contamination, for example hung by the straps in a clean area. Storing it loose, damp or near grinding dust allows the filter media and face seal to become soiled or deformed. A damaged or contaminated respirator will not seal properly and will leak.

Question 30Workplace Safety, Health and Environment (WHS)

A welder is preparing to weld a small job in a workshop where a flammable solvent is being decanted nearby. Analysis of the situation shows the solvent vapour could reach the arc. What is the most reliable control?

  1. Keep a fire extinguisher within five metres of the weld
  2. Ask the other worker to wear a respirator during decanting
  3. Move the solvent decanting to a separate, well-ventilated area away from the hot work Correct answer.
  4. Increase the workshop ventilation fans to full speed

Explanation

Removing the flammable solvent activity from the hot work area eliminates the chance of ignition, which is the most reliable control because it removes the hazard rather than relying on behaviour or equipment. Ventilation and extinguishers reduce consequences but do not remove the ignition source or the fuel. Separating incompatible activities is a standard hot work control.

Question 31Interpretation of Drawings, Plans and Specifications

On an engineering drawing, what does the abbreviation 'CL' placed at the centre of a circular feature indicate?

  1. Clearance
  2. Chamfer length
  3. Cutting length
  4. Centre line Correct answer.

Explanation

CL is a standard drawing abbreviation for centre line, the chain line that marks the axis of a symmetrical or circular feature. Welders use it to locate the true centre of holes, pipes and bores before marking out or setting up a joint.

Question 32Interpretation of Drawings, Plans and Specifications

A drawing shows a weld symbol with a triangle sitting on the reference line and no size number beside it. What does this tell the welder?

  1. The weld must be ground flush after welding
  2. The weld is a full penetration butt weld
  3. The weld is a temporary tack only
  4. The weld is a fillet weld made to the size shown in the general notes Correct answer.

Explanation

The triangle is the fillet weld symbol, and when no leg size is written the size is taken from the general notes or the standard referenced on the drawing. The symbol also sits on the reference line, meaning the weld is placed on the arrow side of the joint.

Question 33Interpretation of Drawings, Plans and Specifications

On a third-angle projection drawing, where is the top view placed relative to the front view?

  1. To the left of the front view
  2. To the right of the front view
  3. Below the front view
  4. Above the front view Correct answer.

Explanation

In third-angle projection the object is imagined between the viewer and the plane, so the top view appears above the front view. First-angle projection places it below, so recognising the projection method is essential before reading dimensions.

Question 34Interpretation of Drawings, Plans and Specifications

A drawing note states 'ALL DIMENSIONS IN MILLIMETRES'. What is the correct interpretation of a dimension written as 6?

  1. 6 inches
  2. 6 metres
  3. 6 centimetres
  4. 6 millimetres Correct answer.

Explanation

A general note declaring millimetres means every undimensioned unit on the drawing is read as millimetres. Without such a note the welder must confirm the unit with the supervisor before cutting or setting up.

Question 35Interpretation of Drawings, Plans and Specifications

What does the term 'scale 1:10' on a drawing title block mean?

  1. The drawing has been checked ten times
  2. Ten units on the drawing represent one unit on the real part
  3. One unit on the drawing represents ten units on the real part Correct answer.
  4. The tolerance is one tenth of a millimetre

Explanation

A ratio of 1:10 is a reducing scale, so every drawn length is one tenth of the actual component size. Dimensions written on the drawing always state true size, so the welder must never scale directly from the paper.

Question 36Interpretation of Drawings, Plans and Specifications

A weld symbol has the triangle drawn below the reference line. On which side of the joint is the weld placed?

  1. Both sides equally
  2. The arrow side
  3. The side chosen by the welder
  4. The other side Correct answer.

Explanation

The reference line has an arrow side, where the arrow touches it, and an other side, opposite the arrow. A symbol placed below the line indicates welding on the other side of the joint.

Question 37Interpretation of Drawings, Plans and Specifications

A drawing shows a groove weld symbol with the letters 'BW' written in the tail. What does this indicate?

  1. A butt weld is specified by the tail reference Correct answer.
  2. A backing weld is required
  3. The weld is a bridge weld detail
  4. The weld is to be back gouged

Explanation

The tail of the welding symbol carries supplementary information such as the process or a reference document, and here BW denotes a butt weld. The welder should confirm the meaning against the drawing legend or specification referenced in the tail.

Question 38Interpretation of Drawings, Plans and Specifications

A structural drawing specifies a fillet weld with a leg size of 8 mm and a length of 200 mm, with the length dimension placed to the right of the weld symbol. What does this describe?

  1. A 200 mm long weld with 8 mm pitch
  2. An intermittent 8 mm fillet weld with 200 mm pitch
  3. A continuous 8 mm fillet weld 200 mm long Correct answer.
  4. A chain intermittent weld of 8 mm and 200 mm segments

Explanation

A length written to the right of the weld symbol gives the total length of that weld, so the detail calls for one continuous fillet 200 mm long. Intermittent welds are shown by length and pitch separated by a dash.

Question 39Interpretation of Drawings, Plans and Specifications

A drawing uses a datum line along the base of a column with dimensions stacked from it. Why are dimensions taken from the datum rather than chained end to end?

  1. It means the part needs no marking out
  2. It removes the need for a welding procedure
  3. It allows the welder to ignore tolerances
  4. It prevents accumulated error building up along the part Correct answer.

Explanation

Datum dimensioning gives every feature a single reference, so small errors in individual dimensions do not add together. Chained or running dimensions accumulate tolerance stack-up and can push the finished assembly out of specification.

Question 40Interpretation of Drawings, Plans and Specifications

A drawing shows a plate 1200 mm long with a tolerance of plus or minus 2 mm. What is the maximum acceptable finished length?

  1. 1198 mm
  2. 1204 mm
  3. 1200 mm
  4. 1202 mm Correct answer.

Explanation

A symmetric tolerance of plus or minus 2 mm allows the dimension to vary 2 mm either way from the nominal 1200 mm. The upper limit is therefore 1200 plus 2, which equals 1202 mm.

Question 41Interpretation of Drawings, Plans and Specifications

A drawing shows a surface finish symbol of a tick with the figure 6.3 beside it on a machined face near a weld. What does this tell the welder?

  1. The face must be painted to 6.3 mm thickness
  2. The face must be welded with a 6.3 mm leg
  3. The face must be tacked every 6.3 mm
  4. The face must be machined to a roughness value of 6.3 micrometres Correct answer.

Explanation

The tick symbol denotes a surface texture requirement, and the number gives the maximum roughness average in micrometres. A welder must protect such a face from spatter and distortion because it is a controlled machined surface.

Question 42Interpretation of Drawings, Plans and Specifications

A fabrication drawing shows a part with a dimension enclosed in brackets, such as (150). What does this convention mean?

  1. The dimension is critical and must be inspected
  2. The dimension has been superseded
  3. The dimension is a tolerance in inches
  4. The dimension is a reference value not used for inspection Correct answer.

Explanation

Brackets around a dimension mark it as a reference dimension, given for information only and not used for acceptance. The controlling dimension appears elsewhere on the drawing, so the welder should work to that value.

Question 43Interpretation of Drawings, Plans and Specifications

A drawing shows a welding symbol with a circle at the junction of the reference line and the arrow. What does the circle indicate?

  1. Weld by a specific process
  2. Weld with a backing strip
  3. Weld on the arrow side only
  4. Weld all around the joint Correct answer.

Explanation

A small circle at the elbow of the welding symbol means the weld continues all around the joint. The welder must plan the sequence so the weld finishes cleanly at the start point without leaving a crater.

Question 44Interpretation of Drawings, Plans and Specifications

A drawing shows a field weld symbol, a flag at the junction of the reference line and the arrow. What does this mean for the welder?

  1. The weld is a temporary field tack
  2. The weld is made with a field welding machine only
  3. The weld is made at the site of installation rather than in the workshop Correct answer.
  4. The weld must be made by a field-qualified inspector

Explanation

The flag denotes a field weld, meaning the joint is completed after the component leaves the workshop. This affects planning because access, weather protection and inspection at site must all be considered.

Question 45Interpretation of Drawings, Plans and Specifications

A drawing shows a groove weld symbol with the letters 'SS' in the tail and a note referring to a procedure. What does the tail reference normally point the welder to?

  1. The site safety plan
  2. The paint specification for the finished item
  3. The welding procedure specification or governing standard Correct answer.
  4. The steel supplier's delivery docket

Explanation

The tail is used to reference a document such as the welding procedure specification or the applicable standard. The welder must follow the parameters in that document, including process, consumable and preheat.

Question 46Interpretation of Drawings, Plans and Specifications

A drawing shows a section view marked A-A with hatching on a plate and a gap between two hatched areas. What does the gap most likely represent?

  1. A space or unwelded gap between two separate components Correct answer.
  2. A weld that has been ground flush
  3. A surface finish requirement
  4. A hole drilled through the plate

Explanation

Hatching in a section view shows solid material that has been cut by the section plane. A clear gap between hatched regions therefore shows a void or a space between separate parts, such as a root gap.

Question 47Interpretation of Drawings, Plans and Specifications

A drawing shows a weld symbol with a number 6 to the left of the fillet triangle and a length of 300 to the right, and the general notes require a 45 degree fillet. What leg size is specified?

  1. 3 mm
  2. 45 mm
  3. 300 mm
  4. 6 mm Correct answer.

Explanation

The figure to the left of the fillet triangle gives the leg length of the weld, so the specified leg is 6 mm. The 300 figure to the right is the weld length and the 45 degrees refers to the fillet angle.

Question 48Interpretation of Drawings, Plans and Specifications

A drawing specifies an intermittent fillet weld as 6-50 with a length of 200 and a note 'staggered'. What does this describe?

  1. 6 mm leg welds every 50 mm along one edge only
  2. 50 mm leg welds, 6 mm pitch, staggered on both sides
  3. 6 mm leg welds, 200 mm pitch, staggered on one side only
  4. 6 mm leg welds, 50 mm pitch, staggered on opposite sides of the joint Correct answer.

Explanation

The pair of figures gives leg size followed by pitch, so 6-50 means a 6 mm leg at 50 mm pitch. The note 'staggered' means the welds on the two sides of the joint are offset from each other rather than opposite.

Question 49Interpretation of Drawings, Plans and Specifications

A drawing shows a double-V butt weld symbol with the letters 'FP' in the tail and a note requiring ultrasonic testing. What does FP most likely indicate in this context?

  1. Field preparation
  2. Full penetration Correct answer.
  3. Fillet profile
  4. Flat position

Explanation

In a weld tail reference, FP commonly denotes full penetration, meaning the weld must fuse through the full joint thickness. The ultrasonic testing note supports this because full penetration welds are usually volumetrically inspected.

Question 50Interpretation of Drawings, Plans and Specifications

A drawing uses a first-angle projection layout and shows three views. A welder needs the view showing the top of the component. Where should it be found?

  1. Above the front view
  2. To the left of the front view
  3. To the right of the front view
  4. Below the front view Correct answer.

Explanation

In first-angle projection the object sits between the viewer and the plane, so the top view is projected below the front view. Confusing this with third-angle layout is a common cause of fabricating a part upside down.