CSWIP 3.1 Certification Exam Prep Test

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| By Catherine Halcomb
Catherine Halcomb
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1. Is it always necessary to preheat the base metal before welding?

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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About This Quiz
CSWIP 3.1 Certification Exam Prep Test - Quiz

Prepare for the CSWIP 3.1 Certification Exam with this specialized quiz designed to assess skills in welding inspection, including slag detection, preheat verification, and root penetration troubleshooting. This... see moretest is ideal for professionals seeking to validate their expertise in welding processes and quality assurance. see less

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

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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3. 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instrument and controls on the welding machine are not functioning properly and their calibration certificate are also out of date.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?

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 If they are not functioning properly and their calibration certificates are out of date, it is necessary to stop welding until corrective measures are completed to rectify the situation.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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4. What does the term of wps mean?

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

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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6. You find several unacceptable weld and reject them, the welding supervisor insist they are acceptable. He sign off them and request NDT, what action would you take?

Explanation

It is important to raise the issue with the QC department supervisor because the welding supervisor's insistence that the unacceptable welds are acceptable goes against the quality control standards. The QC department supervisor is responsible for ensuring that all products meet the required quality standards, so they should be made aware of the situation. Accepting the unacceptable welds without addressing the issue could compromise the quality of the final product and potentially lead to further problems down the line.

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7. Usually liquid penetrant is applicable at temperature range of approximately?

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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8. Slag line found in MMA welds are usually associated with:

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

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

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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11. A standard radiographic film test cannot adequately detect:

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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12. Which of the following may 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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13. The depletion of chromium is austenitic stainless steel will leave the grain structure low, in which of the following?

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

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

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

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

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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18. Which of the following NDE process will best detect internal lack of sidewall fusion on a MAG weld?

Explanation

Ultrasonic testing is the most suitable NDE (Non-Destructive Examination) process for detecting internal lack of sidewall fusion on a MAG (Metal Active Gas) weld. Ultrasonic testing uses high-frequency sound waves to detect flaws or inconsistencies in the material being tested. It is capable of penetrating through the weld and can accurately identify any lack of fusion within the sidewall. Visual inspection may not be able to detect internal flaws, dye penetrant testing is more suitable for surface defects, and radiography may not provide the same level of detail as ultrasonic testing for this specific type of flaw.

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19. Which of the following will help to reduce distortion?

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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20. Solidification cracking take place in carbon steels:

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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21. Thoriated tungsten electrodes have the major disadvantages of:

Explanation

Thoriated tungsten electrodes have the major disadvantage of being radioactive in nature. This means that they emit radiation, which can be harmful to human health and the environment. This poses a risk for workers who handle these electrodes and for anyone who is exposed to them. It is important to handle and dispose of thoriated tungsten electrodes properly to minimize the potential risks associated with their radioactive nature.

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

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

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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24. When reviewing the wps during welding the maximum interpass stated is 250oC. What would be the minimum interpass 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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25. In welding inspection, what does the term "WPS" typically refer to?

Explanation

A Welding Procedure Specification (WPS) is a written document that provides detailed instructions and guidelines for performing welding operations. It includes information such as welding parameters, materials to be welded, welding positions, and post-weld heat treatment requirements. A WPS ensures that welding procedures are consistently followed to achieve the desired quality and integrity of welded joints.

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26. A typical temperature for stress relieving carbon steel is:

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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27. 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?

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

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

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

Explanation

In Non-Destructive Testing (NDT), prod is used in Magnetic Particle Testing (MPI) to create a magnetic field on the test surface, helping to detect surface and near-surface flaws. Prods are placed directly on the material to induce a magnetic field. On the other hand, probe is used in Ultrasonic Testing (UT) to send and receive ultrasonic waves. The probe generates high-frequency sound waves that reflect off internal flaws, helping to locate and assess defects within the material.

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31. When would you measure the minimum preheat temperature?

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

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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33. When welding medium carbon steel plate over 100mm in thickness would basic electrodes used any pre-treatment before 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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34. Which of the following is quantitative test?

Explanation

A quantitative test is a test that provides numerical data or measurements. The tensile test is a type of mechanical test that measures the strength and elasticity of a material by subjecting it to tension. This test involves applying a controlled force to a specimen until it breaks, and the resulting data is used to determine various mechanical properties such as yield strength, ultimate tensile strength, and elongation. Therefore, the tensile test is considered a quantitative test as it provides numerical data for analysis and comparison.

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

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

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

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

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

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

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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41. A weld all around symbol is not required when:

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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42. 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?

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

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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44. 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?

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

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

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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47. 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?

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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48. During PWHT what is the sequence for PWHT chart?

Explanation

The correct sequence for the PWHT chart is as follows: unrestricted heating rate, restricted heating rate, soak time, restricted cooling rate, unrestricted cooling rate. This sequence ensures that the material is heated at a controlled rate, held at a specific temperature for a certain period of time, and then cooled down gradually to prevent any thermal stresses or distortions. By following this sequence, the material can be effectively treated during PWHT.

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

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

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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51. In narrow gap SAW, which of the following is not true?

Explanation

The statement "operates only two wires" is not true in the case of narrow gap SAW. Narrow gap SAW typically uses multiple wires (more than two) to achieve efficient and effective welding. The use of multiple wires allows for better control of the welding process and helps in achieving higher productivity and quality.

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52. Which of the following could be used to minimize the occurrence of the solidification cracking?

Explanation

Reducing the dilution in the base metal can help minimize the occurrence of solidification cracking. When the base metal is diluted with foreign elements from the filler metal during welding, it can lead to a change in the composition and structure of the metal, making it more prone to cracking. By reducing the dilution, the base metal retains its original composition and properties, reducing the risk of solidification cracking.

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

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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54. Which of these statements is true concerning lamellar tearing?

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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55. In GMAW  welding, which mode of metal transfer uses high and low current cycles?

Explanation

In the pulse-spray transfer mode, the power supply cycles between a high spray transfer current and a low background current. This allows for supercooling of the weld pool during the background cycle, making it slightly different than a true spray transfer.

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

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

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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58. Charpy impact tests showing a rough torn surface after the completed test would indicate which type of failure?

Explanation

The Charpy impact test measures the amount of energy absorbed by a material when it is subjected to a sudden impact. A rough torn surface after the test indicates that the material underwent ductile failure. Ductile failure occurs when a material deforms plastically before fracturing, resulting in a rough and torn surface. This is in contrast to brittle failure, where the material fractures with little or no plastic deformation, resulting in a clean and smooth break. Therefore, the correct answer is ductile.

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

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

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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Is it always necessary to preheat the base metal before welding?
What are the three metal transfer modes when using MIG/MAG (GMAW):
Many of meters, instrument and controls on the welding machine are not...
What does the term of wps mean?
What cause of action should be taken upon finding a welder using...
You find several unacceptable weld and reject them, the welding...
Usually liquid penetrant is applicable at temperature range of...
Slag line found in MMA welds are usually associated with:
To assess the surface of a weld for direct inspection, the distance...
During inspection of a fillet weld you notice slag in the toes of the...
A standard radiographic film test cannot adequately detect:
Which of the following may cause distortion?
The depletion of chromium is austenitic stainless steel will leave the...
At what level is the hardness value a problem when trying to minimize...
Post inspection cleaning or further treatment of component is not...
A tensile test was 120mm long before testing and after testing the...
Hydrogen cracking is considered a cold crack as it will not form until...
Which of the following NDE process will best detect internal lack of...
Which of the following will help to reduce distortion?
Solidification cracking take place in carbon steels:
Thoriated tungsten electrodes have the major disadvantages of:
At what level is H2 considered to be more critical in cracking?
Why essential to clean the surrounding parent metal adjacent to weld...
When reviewing the wps during welding the maximum interpass stated is...
In welding inspection, what does the term "WPS" typically...
A typical temperature for stress relieving carbon steel is:
The correct joint preparation is very important since it decides of...
What heat treatment is used to create a high strength but brittle...
Which of the following types of imperfection is generally considered...
For which of the following types of NDT does the term prod related?
When would you measure the minimum preheat temperature?
The welders have increased the voltage on the SAW set. What would be...
When welding medium carbon steel plate over 100mm in thickness would...
Which of the following is quantitative test?
Which is the most accurate method of ensuring that the correct preheat...
During root weld which of the following would be main cause lack of...
Which of the following defect are the most difficult to size correctly...
The similarities between EN ISO 22553 and AWS A2.4 in depicting...
When examining a completed macro test, the recorded hardness figures...
For a bend test which of the following is not true?
A weld all around symbol is not required when:
Due to the high heating effect in the electrode when TIG welding with...
In SAW at higher currents or in the case of multiple electrode system,...
A transverse tensile test was carried out on a welding procedure. The...
Weld decay is caused by the formation of a compound with carbon. The...
Which test from below measures the material property known as fracture...
In SAW process, before starting the weld you observe that the wps was...
During PWHT what is the sequence for PWHT chart?
According to AWS A2.4, where does the symbol go for welding on the...
In a fillet weld fracture test, the specimen is broken with:
In narrow gap SAW, which of the following is not true?
Which of the following could be used to minimize the occurrence of the...
In the GMAW process the use of pulsed current usually result in...
Which of these statements is true concerning lamellar tearing?
In GMAW  welding, which mode of metal transfer uses high and low...
Which one of these elongation value would be more susceptible to...
The melting rate on the wire in the GMAW and FCAW process depend on:
Charpy impact tests showing a rough torn surface after the completed...
Which of the following inspection point is most critical to arc...
In considering the shielding gases argon, helium and carbon dioxide....
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