CSWIP 3.1 Certification Exam Prep Test

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CSWIP 3.1 Certification Exam Prep Test - Quiz


Questions and Answers
  • 1. 

    During inspection of a fillet weld you notice slag in the toes of the weld. What action will you take?

    • A.

      As a fillet weld does not need to be strong, slag will not be a problem

    • B.

      Measure slag, if it is less than 3mm it will not be a problem

    • C.

      Have the welder to remove the slag in as this could mask any discontinuity

    • D.

      Tell the welder to leave the slag in as it will add strength to the fillet weld

    Correct Answer
    C. Have the welder to remove the slag in as this could mask any discontinuity
    Explanation
    Slag in the toes of a weld can potentially mask any discontinuity or defect in the weld. It is important to have the welder remove the slag to ensure that the weld is thoroughly inspected for any potential issues. This will help to maintain the quality and integrity of the fillet weld.

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  • 2. 

    Which is the most accurate method of ensuring that the correct preheat is applied

    • A.

      Measure it with heat sensitive crayon (tempil stick)

    • B.

      Using calibrated digital thermometer

    • C.

      Using heat treatment equipment with thermocouples attached and a chart recorder

    • D.

      Temperature measuring paint

    Correct Answer
    C. Using heat treatment equipment with thermocouples attached and a chart recorder
    Explanation
    Using heat treatment equipment with thermocouples attached and a chart recorder is the most accurate method of ensuring that the correct preheat is applied. This method allows for precise temperature monitoring and recording throughout the heating process. The thermocouples measure the actual temperature, and the chart recorder provides a visual representation of the temperature over time. This ensures that the desired preheat temperature is reached and maintained consistently, minimizing the risk of overheating or underheating the material.

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  • 3. 

    For which of the following types of NDT does the term prod related?

    • A.

      Ultrasonic testing

    • B.

      Radiography testing

    • C.

      Penetrant testing

    • D.

      Magnetic particle testing

    Correct Answer
    D. Magnetic particle testing
    Explanation
    The term "prod" is related to Magnetic particle testing. Magnetic particle testing is a non-destructive testing method used to detect surface and near-surface defects in ferromagnetic materials. It involves magnetizing the material and applying iron particles to the surface. If there is a defect, the magnetic field will cause the iron particles to gather at the defect location, making it visible. The term "prod" is commonly used in the context of Magnetic particle testing to refer to the act of physically touching or probing the surface with a magnetic particle probe to detect defects.

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  • 4. 

    During root weld which of the following would be main cause lack of root penetration?

    • A.

      The root gap is too large in accordance with wps

    • B.

      Preheat was not used

    • C.

      The current is too low 

    • D.

      Root face is too small

    Correct Answer
    C. The current is too low 
    Explanation
    The main cause of lack of root penetration during root weld is the current being too low. When the current is insufficient, it does not provide enough heat to melt and fuse the root properly, resulting in poor penetration. This can lead to weak welds and potential structural issues. The other options mentioned, such as the root gap being too large, preheat not being used, or the root face being too small, can also contribute to welding issues, but the current being too low is the most significant factor in this case.

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  • 5. 

    A weld all around symbol is not required when:

    • A.

      Indicating circumferential joint

    • B.

      Indicating a pipe to pipe butt weld

    • C.

      Indicating a nozzle to shell weld

    • D.

      All of the answers indicated

    Correct Answer
    D. All of the answers indicated
    Explanation
    When all of the answers indicated are true, it means that a weld all around symbol is not required in any of the mentioned scenarios. This symbol is typically used to indicate that a weld is required to extend all the way around the joint. However, in the case of a circumferential joint, a pipe to pipe butt weld, or a nozzle to shell weld, the weld is already implied to be all around and therefore the symbol is not necessary.

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  • 6. 

    What are the three metal transfer modes when using MIG/MAG (GMAW):

    • A.

      Dip, drop, drag

    • B.

      Trailing, vertical, leading

    • C.

      Pulse, dip, flood

    • D.

      Dip, spray, pulse

    Correct Answer
    D. Dip, spray, pulse
    Explanation
    The correct answer is dip, spray, pulse. When using MIG/MAG (GMAW) welding, there are three metal transfer modes. The dip transfer mode occurs at low current and voltage, where the wire tip touches the weld pool and small droplets are transferred. The spray transfer mode happens at high current and voltage, where the wire tip is continuously fed into the weld pool, creating a fine spray of molten metal. The pulse transfer mode involves alternating between high and low current levels, resulting in controlled droplet transfer. These three transfer modes offer different benefits and are used in different welding applications.

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  • 7. 

    Which of these statements is true concerning lamellar tearing?

    • A.

      As material gets thicker the ductility decreases

    • B.

      As material gets thicker the resistance to lamellar tearing improves

    • C.

      As material gets thicker the ductility improves

    • D.

      Thick material don't  suffer from lamellar tearing

    Correct Answer
    A. As material gets thicker the ductility decreases
    Explanation
    As material gets thicker, the ductility decreases. This means that as the thickness of the material increases, its ability to deform or stretch without breaking or tearing decreases. Lamellar tearing refers to a type of tearing that occurs along the grain boundaries of steel plates during welding or fabrication. Thicker materials are more prone to this type of tearing due to the increased stress and strain on the grain boundaries. Therefore, the statement that as material gets thicker the ductility decreases is true concerning lamellar tearing.

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  • 8. 

    The similarities between EN ISO 22553 and AWS A2.4 in depicting welding symbols are:

    • A.

      Both have the same rule for depicting "weld all around"

    • B.

      Both have the same rule for depicting "other side"

    • C.

      Both have the same rule for depicting "sequence of operations"

    • D.

      Both have the same method

    Correct Answer
    A. Both have the same rule for depicting "weld all around"
    Explanation
    Both EN ISO 22553 and AWS A2.4 have the same rule for depicting "weld all around". This means that in both standards, the symbol used to represent a weld that extends all the way around a joint is the same. This similarity ensures consistency and clarity in communication between welders and engineers using either standard.

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  • 9. 

    When would you measure the minimum preheat temperature?

    • A.

      On completion of each pass

    • B.

      Immediately prior to commencing the first pass and subsequent passes

    • C.

      When the welding is completed 

    • D.

      Minimum preheat temperature measurement is only required if the heat input lower than the specified in WPS

    Correct Answer
    B. Immediately prior to commencing the first pass and subsequent passes
    Explanation
    The minimum preheat temperature should be measured immediately prior to commencing the first pass and subsequent passes. This is because preheating is done to reduce the risk of hydrogen cracking and to ensure proper weld quality. By measuring the temperature right before starting each pass, the welder can ensure that the preheat temperature is maintained throughout the welding process, minimizing the risk of defects in the weld.

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  • 10. 

    A typical temperature for stress relieving carbon steel is:

    • A.

      100oC

    • B.

      200oC

    • C.

      600oC

    • D.

      900oC

    Correct Answer
    C. 600oC
    Explanation
    The correct answer is 600oC. Stress relieving is a heat treatment process used to reduce residual stresses in materials, including carbon steel. The typical temperature for stress relieving carbon steel is around 600oC. At this temperature, the steel undergoes a transformation that helps to relieve internal stresses and improve its mechanical properties. Higher temperatures may cause excessive grain growth, while lower temperatures may not be sufficient to fully relieve the stresses. Therefore, 600oC is the most suitable temperature for stress relieving carbon steel.

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  • 11. 

    When examining a completed macro test, the recorded hardness figures were 5HV points over the maximum permitted. what would your course of action be?

    • A.

      Apply for concession

    • B.

      Reject the whole procedure

    • C.

      Request a retest

    • D.

      Accept it is as only just over the permitted value

    Correct Answer
    C. Request a retest
    Explanation
    If the recorded hardness figures were 5HV points over the maximum permitted, the appropriate course of action would be to request a retest. This is because the results are slightly above the permitted value, indicating a potential error or inconsistency in the initial test. By requesting a retest, it allows for a second evaluation to confirm the accuracy of the hardness figures and ensure compliance with the permitted standards.

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  • 12. 

    What does the term of wps mean?

    • A.

      Weld productivity specifications

    • B.

      Weld production scheme 

    • C.

      Welding procedure specification

    • D.

      Work productivity standard

    Correct Answer
    C. Welding procedure specification
    Explanation
    "WPS" typically stands for "Welding Procedure Specification." This document outlines the necessary welding parameters and procedures required to achieve a specific weld. It includes information such as welding process, materials, joint design, welding positions, preheat and interpass temperatures, welding techniques, and other relevant details. It ensures consistency and quality in welding operations by providing a standardized procedure for welders to follow.

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  • 13. 

    Due to the high heating effect in the electrode when TIG welding with AC it is usual that a tungsten electrode used for AC welding is?

    • A.

      Ground to a fine vertex angle of >30o before welding

    • B.

      Use straight from packet without any grinding

    • C.

      Lightly ground to a slight chamfer (corners only removed)

    • D.

      Use without grinding and baked at 300o​​​​​​​C for an hour before use

    Correct Answer
    C. Lightly ground to a slight chamfer (corners only removed)
    Explanation
    When TIG welding with AC, the high heating effect in the electrode causes it to wear down quickly. Therefore, it is necessary to lightly grind the tungsten electrode to a slight chamfer, removing only the corners. This helps to maintain a stable arc and prevent the electrode from overheating and melting too quickly. Grinding the electrode to a fine vertex angle or using it straight from the packet without grinding would not be ideal as it would result in poor arc stability and premature electrode failure. Baking the electrode at 300oC for an hour before use is not necessary for AC welding and would not have any significant impact on its performance.

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  • 14. 

    Usually liquid penetrant is applicable at temperature range of approximately?

    • A.

      0oC - 100oC

    • B.

      -5oC - 90oC

    • C.

      -20oC - 60oC

    • D.

      5oC - 60oC

    Correct Answer
    D. 5oC - 60oC
    Explanation
    The correct answer is 5oC - 60oC. This temperature range is typically suitable for the application of liquid penetrant. Temperatures below 5oC may cause the penetrant to freeze or become less effective, while temperatures above 60oC may cause the penetrant to evaporate or degrade. Therefore, the recommended temperature range ensures optimal performance and accurate results during the penetrant testing process.

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  • 15. 

    What heat treatment is used to create a high strength but brittle microstructure?

    • A.

      Quenching hardening

    • B.

      Normalizing 

    • C.

      Annealing

    • D.

      Stress relieving

    Correct Answer
    A. Quenching hardening
    Explanation
    Quenching hardening is the heat treatment used to create a high strength but brittle microstructure. During quenching hardening, the material is heated to a high temperature and then rapidly cooled by immersing it in a quenching medium such as oil or water. This rapid cooling causes the formation of a hardened microstructure, which increases the material's strength but also makes it more brittle. This heat treatment is commonly used for materials that require high strength, such as tool steels, but may not be suitable for applications where toughness and ductility are important.

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  • 16. 

    In the GMAW process the use of pulsed current usually result in between?

    • A.

      Globular transfer and dip transfer

    • B.

      Spray and globular transfer

    • C.

      Spray and dip transfer

    • D.

      None of the answer given are correct

    Correct Answer
    C. Spray and dip transfer
    Explanation
    The principal advantages of pulsed MIG/MAG welding are:

    It allows the use of smooth, spatter free welding at mean currents (50-150A), which would otherwise be too low for all except dip transfer with its irregular transfer and associated spatter.

    Pulsing can extend spray operation below and through the natural transition (180-220A for 1-1.2mm mild steel wire) from dip to spray where globular transfer would normally occur.

    Pulsed transfer is midway between spray transfer and the dip transfer mechanism, which can be too 'cold' (due to non-continuous arcing; the arc effectively 'goes out' between each melting cycle). This makes it ideal for welding thicker sections where more heat is needed but for which spray transfer is still too 'hot'.

    Pulsed MIG allows welding at higher deposition rates in all positions where dip or spray transfer are not applicable.

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  • 17. 

    According to AWS A2.4, where does the symbol go for welding on the arrow side?

    • A.

      Above solid line 

    • B.

      Below solid line 

    • C.

      Depend on the joint 

    • D.

      Answer weld where the arrow is pointing 

    Correct Answer
    B. Below solid line 
    Explanation
    According to AWS A2.4, the symbol for welding on the arrow side should be placed below the solid line. This indicates that the weld should be made on the side of the joint where the arrow is pointing. The placement of the symbol below the solid line helps to clearly identify the intended location for the weld.

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  • 18. 

    Which of the following defect are the most difficult to size correctly when ultrasonically testing a weld?

    • A.

      Isolated pore > 3mm diameter

    • B.

      Clustered porosity

    • C.

      Slag

    • D.

      Lack of root penetration

    Correct Answer
    B. Clustered porosity
    Explanation
    Clustered porosity refers to a group of small pores or voids that are closely spaced together in a weld. These pores are difficult to size correctly when using ultrasonic testing because they are small and closely packed, making it challenging to distinguish individual pores from each other. Additionally, the proximity of the pores can cause acoustic interference, further complicating the sizing process. Therefore, clustered porosity is the most difficult defect to accurately size when using ultrasonic testing on a weld.

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  • 19. 

    Slag line found in MMA welds are usually associated with:

    • A.

      The voltage being too low

    • B.

      The open circuit current being too high

    • C.

      Improper cleaning between weld runs

    • D.

      Low open circuit voltage

    Correct Answer
    C. Improper cleaning between weld runs
    Explanation
    Slag lines found in MMA welds are usually associated with improper cleaning between weld runs. When welding, it is important to remove any slag or impurities from the previous weld before starting a new one. If this cleaning step is not done properly, slag can be trapped between the weld runs, leading to the formation of slag lines. These lines can weaken the weld and reduce its overall quality. Therefore, it is essential to ensure thorough cleaning between weld runs to avoid the presence of slag lines.

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  • 20. 

    At what level is H2 considered to be more critical in cracking?

    • A.

      Less than 5ml/100gr of weld metal deposited

    • B.

      Between 5ml/100gr and 10ml/100gr of weld metal deposited

    • C.

      Between 5ml/100gr and 15ml/100gr of weld metal deposited

    • D.

      Over 15ml/100gr of weld metal deposited

    Correct Answer
    D. Over 15ml/100gr of weld metal deposited
    Explanation
    When H2 (hydrogen) is present in a concentration of over 15ml/100gr of weld metal deposited, it is considered to be more critical in cracking. This indicates that a high level of hydrogen is present in the weld metal, which increases the risk of hydrogen-induced cracking. The higher the concentration of hydrogen, the greater the likelihood of cracking occurring in the weld. Therefore, it is important to monitor and control the hydrogen content in weld metal to prevent cracking.

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  • 21. 

    In SAW at higher currents or in the case of multiple electrode system, AC is often preferred to:

    • A.

      Avoid the problem of lack of fusion

    • B.

      Avoid the problem of excess of penetration

    • C.

      Avoid the problem of arc blow

    • D.

      Avoid the problem of dilution

    Correct Answer
    C. Avoid the problem of arc blow
    Explanation
    In SAW (Submerged Arc Welding), using AC (Alternating Current) can help avoid the problem of arc blow. Arc blow is a phenomenon where the welding arc is deflected or deviated from its intended path due to magnetic fields or other factors. By using AC, the direction of the magnetic fields can be constantly changing, reducing the chances of arc blow occurring. This helps in maintaining a stable and controlled welding arc, resulting in a better quality weld.

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  • 22. 

    At what level is the hardness value a problem when trying to minimize the risk of HAZ cracking?

    • A.

      270 to 290 HV

    • B.

      300 to 350 HV

    • C.

      100 to 150 HV

    • D.

      160 to 200 HV

    Correct Answer
    B. 300 to 350 HV
    Explanation
    The hardness value becomes a problem when it is in the range of 300 to 350 HV. This range indicates a high level of hardness, which increases the risk of heat-affected zone (HAZ) cracking. HAZ cracking occurs during welding or other high-temperature processes, and it can lead to structural integrity issues. Therefore, minimizing the risk of HAZ cracking requires keeping the hardness value below 300 to 350 HV.

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  • 23. 

    A transverse tensile test was carried out on a welding procedure. The cross sectional area was 30mm wide and 15mm thick. The maximum load applied was 170kN. What is the ultimate tensile strength value?

    • A.

      377 kN/mm2

    • B.

      377 N/mm2

    • C.

      300 N/mm2

    • D.

      600 N/mm2

    Correct Answer
    B. 377 N/mm2
    Explanation
    The ultimate tensile strength value is 377 N/mm2. This can be determined by dividing the maximum load applied (170kN) by the cross-sectional area (30mm x 15mm = 450mm2).

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  • 24. 

    The correct joint preparation is very important since it decides of the volume of weld metal. To be use high volume of weld metal deposited can?

    • A.

      Increased residual stress

    • B.

      Be useful since joint will have better strength

    • C.

      Give a longer service life

    • D.

      Give superior corrosion resistance

    Correct Answer
    A. Increased residual stress
    Explanation
    Increasing the volume of weld metal deposited can lead to increased residual stress in the joint. Residual stress refers to the stress that remains in a material even after the external forces are removed. This can occur due to the uneven heating and cooling during the welding process. Increased residual stress can have negative effects on the joint, such as distortion, cracking, and reduced fatigue life. Therefore, the statement suggests that increased residual stress is a potential consequence of using a high volume of weld metal, rather than a benefit.

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  • 25. 

    Which of the following types of imperfection is generally considered to be the most serious?

    • A.

      Surface breaking planar

    • B.

      Root concavity

    • C.

      Buried planar

    • D.

      Surface breaking non planar

    Correct Answer
    A. Surface breaking planar
    Explanation
    Surface breaking planar imperfections are generally considered to be the most serious because they are defects that extend across the surface and have a planar shape. These imperfections can weaken the structure and compromise its integrity, making it more susceptible to failure. They are easily detectable and can lead to significant damage if not addressed promptly. Root concavity, buried planar, and surface breaking non-planar imperfections may also have negative effects, but surface breaking planar imperfections are typically the most severe.

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  • 26. 

    Which of the following inspection point is most critical to arc conditions for the spray transfer MAG welding process?

    • A.

      All electrical connections and contacts

    • B.

      Gas flow rate

    • C.

      Inductance setting

    • D.

      Electrode coating type

    Correct Answer
    B. Gas flow rate
    Explanation
    he shield gas combination you choose will depend on the metal wire or electrode you’re using for the weld. As a rule of thumb, though, all shield gas combinations for spray arc welding use high levels of argon. At the very least, the mixture must contain a minimum of 80% Argon gas.

    The shield gas directly affects the reactivity rates of the metals. A gas with higher reactivity can significantly increase the weld puddle fluidity. The speed at which the weld puddle increases may be too high for you to control, which could result in a disastrous situation.

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  • 27. 

    The depletion of chromium is austenitic stainless steel will leave the grain structure low, in which of the following?

    • A.

      Chromium oxide

    • B.

      Aluminum oxide

    • C.

      Nickel oxide

    • D.

      Iron oxide

    Correct Answer
    A. Chromium oxide
    Explanation
    The depletion of chromium in austenitic stainless steel will result in the formation of chromium oxide. Chromium is a key element in stainless steel as it helps in forming a protective oxide layer on the surface, which prevents corrosion. When chromium is depleted, this protective layer is compromised, making the grain structure vulnerable to corrosion. Therefore, the formation of chromium oxide is crucial for maintaining the integrity of the stainless steel.

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  • 28. 

    What cause of action should be taken upon finding a welder using incorrect welding consumable?

    • A.

      Report the incident and record with relevant information

    • B.

      Allow welding to proceed if the workmanship is good

    • C.

      None if the tensile strength of the consumable is the same as the approved 

    • D.

      Change the electrode for the correct type and continue welding

    Correct Answer
    A. Report the incident and record with relevant information
    Explanation
    If a welder is found using incorrect welding consumable, the appropriate cause of action would be to report the incident and record it with relevant information. This is important to ensure that the incident is documented and can be addressed appropriately. Allowing the welding to proceed if the workmanship is good may not be advisable as it could compromise the quality and integrity of the weld. Similarly, if the tensile strength of the consumable is the same as the approved, it does not justify using incorrect consumables. Therefore, the best course of action is to report the incident and maintain a record for future reference.

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  • 29. 

    Post inspection cleaning or further treatment of component is not required in which of the following NDT method?

    • A.

      Dye penetrant testing

    • B.

      Ultrasonic testing

    • C.

      Radiographic testing

    • D.

      Magnetic particle testing

    Correct Answer
    C. Radiographic testing
    Explanation
    Radiographic testing, also known as X-ray testing, is a nondestructive testing method that uses X-rays or gamma rays to inspect the internal structure of a component. It is able to detect defects such as cracks, voids, and inclusions. Unlike other NDT methods, radiographic testing provides a clear image of the component's internal structure, eliminating the need for post inspection cleaning or further treatment. Therefore, radiographic testing does not require any additional steps after the inspection process.

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  • 30. 

    To assess the surface of a weld for direct inspection, the distance from the surface to the eye should be a maximum of?

    • A.

      200mm

    • B.

      600mm

    • C.

      60mm

    • D.

      600cm

    Correct Answer
    B. 600mm
    Explanation
    The distance from the surface to the eye should be a maximum of 600mm in order to assess the surface of a weld for direct inspection. This distance allows for a closer and more detailed examination of the weld, ensuring that any potential defects or imperfections can be properly identified and evaluated. A longer distance may result in reduced visibility and make it more difficult to accurately assess the quality of the weld.

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  • 31. 

    A standard radiographic film test cannot adequately detect:

    • A.

      Porosity in the weld volume 

    • B.

      Slag inclusion in a weld

    • C.

      Lamination in rolled plate adjacent to the weld

    • D.

      Lack of root penetration in a weld

    Correct Answer
    C. Lamination in rolled plate adjacent to the weld
    Explanation
    A standard radiographic film test is not capable of adequately detecting lamination in rolled plate adjacent to the weld. This is because lamination refers to the separation or splitting of layers in the rolled plate, which may not be easily visible on a radiographic film. The test is more effective in detecting porosity in the weld volume, slag inclusion in a weld, and lack of root penetration in a weld, as these issues can be identified through the use of radiographic imaging.

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  • 32. 

    Weld decay is caused by the formation of a compound with carbon. The other element in this compound is:

    • A.

      Manganese

    • B.

      Sulphur

    • C.

      Chromium 

    • D.

      Nickel

    Correct Answer
    C. Chromium 
    Explanation
    Weld decay is caused by the formation of a compound with carbon, and the other element in this compound is chromium. Chromium forms a compound with carbon called chromium carbide, which can cause weld decay when it precipitates along the grain boundaries of the weld. This can lead to a loss of corrosion resistance and mechanical properties in the affected area.

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  • 33. 

    Which test from below measures the material property known as fracture toughness?

    • A.

      CTOD test

    • B.

      Fillet weld fracture test

    • C.

      Hardness

    • D.

      Nick break test

    Correct Answer
    A. CTOD test
    Explanation
    The CTOD test measures the material property known as fracture toughness. Fracture toughness is the ability of a material to resist the growth of cracks under applied stress. The CTOD test, also known as the Crack Tip Opening Displacement test, involves applying a controlled load to a pre-cracked specimen and measuring the displacement at the crack tip. This test provides valuable information about the material's resistance to crack propagation and its ability to withstand brittle fracture.

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  • 34. 

    A tensile test was 120mm long before testing and after testing the length was 135mm long, which the percentage elongation?

    • A.

      20%

    • B.

      15%

    • C.

      11%

    • D.

      12.5%

    Correct Answer
    D. 12.5%
    Explanation
    The percentage elongation can be calculated by subtracting the initial length from the final length, dividing it by the initial length, and then multiplying by 100. In this case, the initial length is 120mm and the final length is 135mm. So, the percentage elongation would be (135-120)/120 * 100 = 12.5%.

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  • 35. 

    Hydrogen cracking is considered a cold crack as it will not form until the weldment cool to below:

    • A.

      500oC

    • B.

      300oC

    • C.

      300oF

    • D.

      660oC

    Correct Answer
    B. 300oC
    Explanation
    Hydrogen cracking, also known as cold cracking, occurs when hydrogen atoms become trapped in the weld metal and cause cracks to form. These cracks typically occur during the cooling process of the weldment. The correct answer, 300oC, indicates that hydrogen cracking will not form until the weldment cools to a temperature below 300 degrees Celsius. At this temperature, the risk of hydrogen cracking significantly increases, making it important to control the cooling rate and minimize the presence of hydrogen during the welding process.

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  • 36. 

    Which one of these elongation value would be more susceptible to lamellar tearing?

    • A.

      > 20%

    • B.

      < 20%

    • C.

      ≥ 30%

    • D.

      All the option would be susceptible

    Correct Answer
    B. < 20%
    Explanation
    A lower elongation value indicates that the material has less ability to stretch or deform before it tears. Therefore, a value of less than 20% would make the material more susceptible to lamellar tearing compared to a higher elongation value.

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  • 37. 

    In considering the shielding gases argon, helium and carbon dioxide. Which of the following is true about GMAW process?

    • A.

      They can produce spray transfer

    • B.

      They are always suitable for all position welding

    • C.

      They all produce heavy spatter in DC+

    • D.

      All of the answer options given are correct

    Correct Answer
    A. They can produce spray transfer
    Explanation
    The GMAW process, also known as MIG welding, can use argon, helium, and carbon dioxide as shielding gases. These gases have the ability to produce spray transfer, which is a high-energy welding process that provides excellent penetration and deposition rates. However, it is not mentioned whether they are always suitable for all position welding. Additionally, it is not stated that they all produce heavy spatter in DC+ polarity. Therefore, the correct answer is that they can produce spray transfer, but the other statements are not necessarily true.

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  • 38. 

    Which of the following will help to reduce distortion?

    • A.

      Using the maximum number of runs

    • B.

      Using the minimum number of runs

    • C.

      Welding by a manual method

    • D.

      Using very high heat input

    Correct Answer
    B. Using the minimum number of runs
    Explanation
    Using the minimum number of runs will help to reduce distortion because it minimizes the amount of heat input and thermal cycling that occurs during the welding process. Distortion is often caused by the unequal heating and cooling of the material, and by reducing the number of runs, the overall heat input is reduced, resulting in less distortion.

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  • 39. 

    Which of the following may cause distortion?

    • A.

      Heating

    • B.

      Contraction

    • C.

      Stress

    • D.

      All of the above can cause distortion

    Correct Answer
    D. All of the above can cause distortion
    Explanation
    All of the given options - heating, contraction, and stress - can cause distortion. Heating can cause expansion of materials, leading to changes in shape and size, resulting in distortion. Contraction, on the other hand, can cause materials to shrink or contract, also leading to distortion. Stress, whether it is caused by external forces or internal factors, can cause materials to deform or warp, causing distortion. Therefore, all of these factors have the potential to cause distortion.

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  • 40. 

    Many of meters, instrument and controls on the welding machine are not functioning properly and their calibration certificate are also out of date. what will you do?

    • A.

      Permit welding to proceed with no further action

    • B.

      Use MAP separate measuring instrument and permit welding

    • C.

      Stop welding until corrective measures are completed to rectify the situation

    • D.

      Begin welding and then report to their management when time is available

    Correct Answer
    C. Stop welding until corrective measures are completed to rectify the situation
    Explanation
    It is important to ensure that all meters, instruments, and controls on the welding machine are functioning properly and have up-to-date calibration certificates. If they are not functioning properly and their calibration certificates are out of date, it is necessary to stop welding until corrective measures are completed to rectify the situation. This will ensure the accuracy and safety of the welding process.

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  • 41. 

    Is it always necessary to preheat the base metal before welding?

    • A.

      Not on sunny day

    • B.

      Only in accordance with wps

    • C.

      If the equipment is available it must be used

    • D.

      If using cellulosic rods these will provide enough heat

    Correct Answer
    B. Only in accordance with wps
    Explanation
    The correct answer is "only in accordance with WPS." This means that preheating the base metal before welding is not always necessary. Instead, it should be done only if it is specified in the Welding Procedure Specification (WPS). The WPS provides guidelines for welding processes and procedures, including preheating requirements. So, whether or not preheating is necessary depends on the specific welding procedure outlined in the WPS.

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  • 42. 

    For a bend test which of the following is not true?

    • A.

      A 4T bend is more severe than 2T bend.

    • B.

      The outer surface of the bend specimen is examined.

    • C.

      It reveals defect like lack of fusion and porosity.

    • D.

      It given indication of the ductility of the welded joint and weld metal.

    Correct Answer
    A. A 4T bend is more severe than 2T bend.
    Explanation
    A 4T bend is not more severe than a 2T bend. In fact, the opposite is true. In a bend test, the "T" refers to the thickness of the specimen being bent. So a 2T bend means that the specimen is bent over a radius equal to twice its thickness, while a 4T bend means that the specimen is bent over a radius equal to four times its thickness. The larger the radius, the less severe the bend. Therefore, a 4T bend is less severe than a 2T bend.

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  • 43. 

    Why essential to clean the surrounding parent metal adjacent to weld metal made by MMA which is to be ultrasonic testing?

    • A.

      Sound wave will not travel through paint

    • B.

      Spatter could impact contact of the probe with the parent metal surface

    • C.

      Remove any rust

    • D.

      Spatter will reflect the back wall echo signal and give spurious

    Correct Answer
    B. Spatter could impact contact of the probe with the parent metal surface
    Explanation
    When performing ultrasonic testing on weld metal made by MMA, it is essential to clean the surrounding parent metal adjacent to the weld. This is because spatter, which is the molten metal expelled during the welding process, could impact the contact of the probe with the parent metal surface. If the spatter is not removed, it may create a barrier between the probe and the parent metal, affecting the accuracy of the ultrasonic testing results. Therefore, cleaning the parent metal helps ensure proper contact and reliable testing.

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  • 44. 

    Solidification cracking take place in carbon steels:

    • A.

      After PWHT

    • B.

      In the base metal

    • C.

      Immediately after welding

    • D.

      After few hours

    Correct Answer
    C. Immediately after welding
    Explanation
    Solidification cracking, also known as hot cracking or liquation cracking, occurs immediately after welding in carbon steels. During the welding process, the metal undergoes a rapid cooling and solidification phase. This rapid cooling can cause the formation of brittle microstructures and the development of high stresses. If the metal is unable to accommodate these stresses, cracks can form in the weld zone. Therefore, solidification cracking is most likely to occur immediately after welding, when the metal is still in a highly susceptible state.

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  • 45. 

    The welders have increased the voltage on the SAW set. What would be the effect on the weld appearance?

    • A.

      No effect 

    • B.

      The width would be narrower 

    • C.

      Penetration will be increase

    • D.

      The weld width would be wider

    Correct Answer
    D. The weld width would be wider
    Explanation
    Increasing the voltage on the SAW (Submerged Arc Welding) set would result in a wider weld width. This is because higher voltage leads to increased heat input, causing the weld pool to become larger and resulting in a wider weld bead.

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  • 46. 

    In SAW process, before starting the weld you observe that the wps was made with agglomerated flux but they would now like to use a fused flux. The classification for both is the same though both have been tested under different parameters and conditions in such you will?

    • A.

      Permit the welding to proceed since the classification is same

    • B.

      Insist on using the same type approved by the wps

    • C.

      Try to qualify the process with a new wps

    • D.

      Inform their management when you have time, and wait their advice

    Correct Answer
    B. Insist on using the same type approved by the wps
    Explanation
    In the given scenario, it is important to insist on using the same type of flux that is approved by the Welding Procedure Specification (WPS). Even though the classification for both agglomerated and fused flux is the same, they have been tested under different parameters and conditions. Therefore, using a different type of flux without proper approval from the WPS can lead to variations in the welding process and potentially compromise the quality and integrity of the weld. It is necessary to follow the approved procedures to ensure consistency and adherence to standards.

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  • 47. 

    When reviewing the wps during welding the maximum interpass stated is 250oC. What would be the minimum interpass temperature?

    • A.

      The preheat temperature

    • B.

      The welder would decide this 

    • C.

      Any temperature above 25oC would be acceptable

    • D.

      The interpass temperature is never stated on a wps

    Correct Answer
    A. The preheat temperature
    Explanation
    The minimum interpass temperature would be the preheat temperature. Preheating is done before welding to reduce the cooling rate of the weld and prevent the formation of brittle microstructures. The preheat temperature is typically specified in the welding procedure specification (WPS) and is considered the minimum temperature that should be maintained during welding. Therefore, the preheat temperature would also be the minimum interpass temperature.

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  • 48. 

    In a fillet weld fracture test, the specimen is broken with:

    • A.

      The fillet weld in tension

    • B.

      The fillet weld in compression

    • C.

      No specific method needs to be adopted 

    • D.

      Suitable machining

    Correct Answer
    B. The fillet weld in compression
    Explanation
    In a fillet weld fracture test, the specimen is broken with the fillet weld in compression. This means that the force applied to the specimen is directed towards the weld, compressing it. This type of testing is commonly used to evaluate the strength and quality of fillet welds, as it simulates the conditions that the weld would experience in real-life applications. By breaking the specimen in compression, any weaknesses or defects in the weld can be identified and analyzed.

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  • 49. 

    When welding medium carbon steel plate over 100mm in thickness would basic electrodes used any pre-treatment before use?

    • A.

      None if they were in a vacuum pack opened 8 hours prior to use

    • B.

      None if they were in a sealed vacuum pack immediately prior to use

    • C.

      Heat to 500oC for 2 hours if use outside 

    • D.

      Baked at 150oC for 4 hours prior to use

    Correct Answer
    B. None if they were in a sealed vacuum pack immediately prior to use
    Explanation
    The correct answer is "none if they were in a sealed vacuum pack immediately prior to use." This means that if the electrodes were stored in a sealed vacuum pack until just before they are used, no pre-treatment is necessary. This is because the sealed vacuum pack helps to maintain the quality and integrity of the electrodes, preventing any contamination or oxidation that would require pre-treatment.

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  • 50. 

    The melting rate on the wire in the GMAW and FCAW process depend on:

    • A.

      Voltage per unit length

    • B.

      Shielding gas flow rate

    • C.

      Current density

    • D.

      Ampere per unit length of the wire

    Correct Answer
    D. Ampere per unit length of the wire
    Explanation
    The melting rate on the wire in the GMAW and FCAW process depends on the ampere per unit length of the wire. This means that the rate at which the wire melts is influenced by the amount of current passing through the wire per unit length. A higher ampere per unit length will result in a faster melting rate, while a lower ampere per unit length will result in a slower melting rate. Therefore, the correct answer is ampere per unit length of the wire.

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Apr 08, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 11, 2020
    Quiz Created by
    Catherine Halcomb
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