CSWIP Questin 3
Multi Choice Question
Questions and Answers
- 1.
Which of the following does not require baking or drying?
- A.
E 6010
- B.
E7018
- C.
Sub are flux with Basicity Index of 2
- D.
Sub are flux with Basicity Index of
Correct Answer
A. E 6010Explanation
E 6010 does not require baking or drying because it is a cellulose-based electrode. Cellulose electrodes have a moisture content that helps to provide a shielding gas during welding, eliminating the need for baking or drying. This electrode is commonly used for welding in all positions and is known for its deep penetration and high deposition rates.Rate this question:
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- 2.
A welder and procedure re-qualification would be required:
- A.
When the run out date of the procedure has been reached
- B.
Every Year
- C.
When changing from day to night shift work
- D.
When there is a change in an essential variable
Correct Answer
D. When there is a change in an essential variableExplanation
A welder and procedure re-qualification would be required when there is a change in an essential variable. This means that if there is any change in the welding procedure or any essential variable that affects the quality or integrity of the weld, the welder and procedure need to be re-qualified to ensure that they meet the necessary standards. This is important to maintain the safety and quality of the welding process.Rate this question:
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- 3.
Tensile strength can be increased in steel by:
- A.
Annealing
- B.
Galvanising
- C.
Addition of carbon
- D.
Casting
Correct Answer
C. Addition of carbonExplanation
The addition of carbon can increase the tensile strength of steel. Carbon is a strong and hard element that can form strong bonds with iron, the main component of steel. When carbon is added to steel, it forms a solid solution, strengthening the material and improving its tensile strength. This process is known as carbonization and is commonly used in the production of high-strength steel alloys.Rate this question:
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- 4.
Which of the following always occurs in the parent material?
- A.
Hydrogen cracks
- B.
Laps and laminations
- C.
Centre line cracks
- D.
Porosity
Correct Answer
B. Laps and laminationsExplanation
Laps and laminations always occur in the parent material. Laps are caused by incomplete fusion during the welding process, resulting in a thin layer of metal that does not bond properly. Laminations, on the other hand, are layers of non-metallic inclusions that are embedded in the parent material. Both laps and laminations can weaken the integrity of the material and lead to structural failures if not detected and repaired.Rate this question:
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- 5.
To prevent the hardening and cracking of High Carbon Steel plate when flame cutting it is advisable to:
- A.
Pre-heat the plate
- B.
Soak the plate in oil
- C.
Cool the plate quickly after cutting
- D.
Increase the cutting Oxygen pressure
Correct Answer
A. Pre-heat the plateExplanation
Pre-heating the plate before flame cutting High Carbon Steel helps to prevent hardening and cracking. When the plate is heated, it becomes more ductile and less prone to brittleness. This allows for easier cutting without causing excessive stress on the material, reducing the risk of cracking. Pre-heating also helps to minimize the temperature gradient between the cut and the surrounding material, preventing rapid cooling and subsequent hardening. Overall, pre-heating the plate helps to maintain the integrity of the High Carbon Steel and ensures a successful flame cutting process.Rate this question:
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- 6.
You should always refer to a higher authority for guidance when:
- A.
Cracks appear during welding
- B.
The welder will not follow your instructions
- C.
Instructions are missing in the specification or contract documents
- D.
All of the above
Correct Answer
A. Cracks appear during weldingExplanation
When cracks appear during welding, it is important to refer to a higher authority for guidance. This is because cracks can indicate a problem with the welding process, such as incorrect technique or insufficient heat control. A higher authority, such as a supervisor or expert, can provide guidance on how to address the issue and ensure that the welding is done correctly to prevent further cracks and ensure the structural integrity of the weld.Rate this question:
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- 7.
Fatigue testing is used to test welds:
- A.
Under cyclic loading
- B.
Under creep stress loadings
- C.
Under impact loading
- D.
Under static loading
Correct Answer
A. Under cyclic loadingExplanation
Fatigue testing is used to test welds under cyclic loading. This means that the welds are subjected to repeated or fluctuating loads over a period of time. This type of testing is important because it helps determine the durability and strength of the welds under real-life conditions where they may experience repeated stress or load variations. By subjecting the welds to cyclic loading, any potential weaknesses or failures can be identified, allowing for improvements to be made in the welding process or design to ensure the welds can withstand long-term use.Rate this question:
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- 8.
In BS 639 and BSEN499 the first digits of the electrode classification indicate:
- A.
Tensile and yield strength
- B.
Toughness
- C.
Electrode coating
- D.
Electrode efficiency
Correct Answer
A. Tensile and yield strengthExplanation
The first digits of the electrode classification in BS 639 and BSEN499 indicate the tensile and yield strength of the electrode. This means that the classification code provides information about the maximum amount of stress the electrode can withstand before breaking (tensile strength) and the amount of stress it can bear without permanent deformation (yield strength). This information is crucial in determining the suitability of the electrode for specific welding applications, as it helps in selecting the appropriate electrode for achieving the desired strength and performance in the welded joint.Rate this question:
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- 9.
Cellulosic coatings are generally used because of:
- A.
Their low hydrogen content
- B.
Their high penetration characteristic
- C.
Their high strength weld deposit
- D.
Their high weld toughness values
Correct Answer
B. Their high penetration characteristicExplanation
Cellulosic coatings are generally used because of their high penetration characteristic. This means that these coatings have the ability to deeply penetrate into the material being coated, resulting in better adhesion and coverage. The high penetration characteristic of cellulosic coatings ensures that the coating is able to reach difficult-to-access areas and provide a uniform protective layer. This is especially beneficial in industries such as oil and gas, where equipment and structures are exposed to harsh environments and require a reliable and durable coating.Rate this question:
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- 10.
When welds have a depth to width ration of higher than 2:1 it is possible that:
- A.
Centreline cracks may appear
- B.
The fusion boundary will be outside the HAZ
- C.
The HAZ will be too narrow
- D.
The weld will be non magnetic
Correct Answer
A. Centreline cracks may appearExplanation
When welds have a depth to width ratio of higher than 2:1, it means that the depth of the weld is more than twice its width. This can lead to a concentration of stress along the centerline of the weld, which increases the likelihood of centerline cracks forming. These cracks can weaken the weld and compromise its integrity. Therefore, it is possible that centerline cracks may appear in welds with a depth to width ratio higher than 2:1.Rate this question:
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- 11.
On which of the following would you not use MPI inspection?
- A.
A low carbon steel butt-welded joint
- B.
An Austenitic Stainless steel fillet welded T joint
- C.
A medium carbon steel fillet welded lap joint
- D.
All of the above
Correct Answer
B. An Austenitic Stainless steel fillet welded T jointExplanation
MPI inspection is a non-destructive testing method used to detect surface and near-surface defects in ferromagnetic materials. Austenitic Stainless steel is non-magnetic and does not respond well to MPI inspection. Therefore, MPI inspection would not be suitable for detecting defects in an Austenitic Stainless steel fillet welded T joint.Rate this question:
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- 12.
Increasing the arc energy input of a welded joint will:
- A.
Increase the strength of the joint
- B.
Increase the toughness of the joint
- C.
Increase the grain size of the weld and HAZ
- D.
Decrease the width of the HAZ
Correct Answer
C. Increase the grain size of the weld and HAZExplanation
Increasing the arc energy input of a welded joint will lead to an increase in the grain size of the weld and heat-affected zone (HAZ). This is because higher arc energy input results in a higher heat input during the welding process, causing the metal to heat up more and resulting in larger grains in the weld and HAZ. Larger grain size can affect the mechanical properties of the joint, such as reducing its strength and toughness. Therefore, increasing the arc energy input can have a negative impact on the quality and performance of the welded joint.Rate this question:
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- 13.
In Sub Arc Welding, excessive flux melting will result from:
- A.
Increasing the arc voltage
- B.
Decreasing the arc voltage
- C.
Increasing the travel speed
- D.
Increasing the wire feed speed
Correct Answer
A. Increasing the arc voltageExplanation
Increasing the arc voltage in Sub Arc Welding will result in excessive flux melting. The arc voltage is the electrical potential difference between the electrode and the workpiece. When the arc voltage is increased, it causes the arc to become longer and hotter. This increased heat causes the flux to melt more rapidly, leading to excessive flux melting.Rate this question:
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- 14.
An IQI would be used in radiography to assess:
- A.
Image quality
- B.
Type of steel
- C.
Density of graph
- D.
Type of welding process used
Correct Answer
A. Image qualityExplanation
An IQI, or Image Quality Indicator, is a tool used in radiography to assess the quality of an image. It helps determine the clarity, resolution, and overall accuracy of the radiographic image. By using an IQI, radiographers can evaluate factors such as contrast, sharpness, and visibility of details in the image. This allows them to ensure that the radiographic image meets the required standards for diagnostic purposes. Therefore, the correct answer for this question is "Image quality."Rate this question:
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- 15.
Silicon is added to electrode coating as:
- A.
A slipping agent
- B.
A slag former
- C.
A de-oxidant
- D.
A colouring agent
Correct Answer
C. A de-oxidantExplanation
Silicon is added to electrode coating as a de-oxidant. When silicon is added to the coating, it reacts with oxygen in the atmosphere to form silicon dioxide. This helps to remove any oxygen present in the coating and prevents the formation of oxides during the welding process. By acting as a de-oxidant, silicon helps to improve the quality of the weld by reducing the presence of impurities and ensuring a cleaner and stronger bond between the electrode and the base metal.Rate this question:
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- 16.
The main reason degreasing agents should always be dried from metals prior to welding, is because they are likely to:
- A.
Increase the arc voltage
- B.
Produce hazardous fumes
- C.
Slow down the welding speed
- D.
Produce lack of fusion defects
Correct Answer
B. Produce hazardous fumesExplanation
Degreasing agents should always be dried from metals prior to welding because they are likely to produce hazardous fumes. When degreasing agents are not properly dried, they can release harmful chemicals and gases when exposed to high temperatures during welding. These fumes can be toxic and pose a health risk to the welder and anyone in the vicinity. Therefore, it is important to ensure that all degreasing agents are completely removed and dried before starting the welding process to prevent the production of hazardous fumes.Rate this question:
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- 17.
Which of the following processes would be most prone to lack of fusion defects?
- A.
Pulsed arc MIG
- B.
Spray transfer MIG
- C.
Dip transfer MIG
- D.
Submerged arc
Correct Answer
C. Dip transfer MIGExplanation
Dip transfer MIG would be most prone to lack of fusion defects because in this process, the electrode is dipped into the weld pool, creating a short circuit and transferring small droplets of metal to the base material. This method is more likely to result in lack of fusion because the weld pool is not as well controlled as in other processes, leading to potential gaps or incomplete fusion between the weld metal and the base material.Rate this question:
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- 18.
Which of the following is an inspection point in Sub Arc Welding:
- A.
Flux mesh size
- B.
Gas type
- C.
Tungsten size
- D.
Gas flow rate
Correct Answer
A. Flux mesh sizeExplanation
An inspection point in Sub Arc Welding is the flux mesh size. Flux is a material that is used to protect the weld from atmospheric contamination and helps in the formation of a sound weld. The flux mesh size refers to the size of the particles in the flux. It is important to inspect the flux mesh size as it can affect the quality of the weld. If the flux mesh size is too large, it may not provide adequate protection or may cause excessive spatter. On the other hand, if the flux mesh size is too small, it may result in clogging of the welding equipment. Therefore, inspecting the flux mesh size is crucial to ensure a proper and high-quality weld.Rate this question:
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- 19.
Which of the following is not inert gas ?
- A.
Argon
- B.
Xenon
- C.
Carbon dioxide
- D.
Helium
Correct Answer
C. Carbon dioxideExplanation
Carbon dioxide is not an inert gas because it is a compound composed of carbon and oxygen. Inert gases, also known as noble gases, are elements that are characterized by their low reactivity and stability due to having a full outer electron shell. Argon, xenon, and helium are all noble gases and meet the criteria of being inert. However, carbon dioxide is a greenhouse gas and can react with other substances, making it an active and non-inert gas.Rate this question:
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- 20.
Why is a welding arc shielded?
- A.
To eliminate hydrogen
- B.
To retard the cooling rate of the weld
- C.
To eliminate the atmosphere
- D.
To ensure maximum heat input
Correct Answer
C. To eliminate the atmosphereExplanation
A welding arc is shielded to eliminate the atmosphere. When welding, the high temperatures generated by the arc can react with the surrounding air, causing oxidation and contamination of the weld. By shielding the arc, typically with an inert gas, the atmosphere is displaced, preventing these reactions and ensuring a clean and high-quality weld.Rate this question:
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- 21.
A crack in a weld zone:
- A.
Is repairable
- B.
Always results in a cut out and complete re-weld
- C.
Is acceptable up to 2mm in length
- D.
May be repaired or cut out depending on specification requirements
Correct Answer
D. May be repaired or cut out depending on specification requirementsExplanation
A crack in a weld zone may be repaired or cut out depending on specification requirements. This means that the decision to repair or cut out the crack depends on the specific requirements set by the specifications of the project. It is not always necessary to completely re-weld the area, and the crack can be repaired if it meets the specified criteria. However, if the crack does not meet the requirements, it may need to be cut out and re-welded.Rate this question:
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- 22.
If the amperage is too low during the welding of a root bead, the possible result would be:
- A.
Lack of penetration
- B.
Lack of fusion
- C.
The freezing of the electrode
- D.
All of the above
Correct Answer
A. Lack of penetrationExplanation
If the amperage is too low during the welding of a root bead, the possible result would be lack of penetration. This means that the weld will not penetrate deep enough into the base metal, resulting in a weak and incomplete bond. This can lead to structural integrity issues and potential failure of the weld joint.Rate this question:
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- 23.
Pre-heating prior to welding:
- A.
Must always be carried out
- B.
Need not be carried out if post heat treatment is to follow welding
- C.
Is always carried out using gas flames
- D.
All of the above
- E.
None of the above
Correct Answer
C. Is always carried out using gas flamesExplanation
Pre-heating prior to welding is always carried out using gas flames. This process helps in reducing the risk of cracking and distortion in the welded joint by raising the temperature of the base metal. It also helps in eliminating any moisture or impurities that may be present in the metal. Pre-heating is necessary in certain cases to ensure the proper fusion of the weld and to improve the overall quality and strength of the joint. Therefore, the correct answer is "Is always carried out using gas flames."Rate this question:
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- 24.
Cold lap in another term for:
- A.
Lack of fusion
- B.
Low amperage
- C.
Undercut
- D.
Hydrogen cracking
Correct Answer
A. Lack of fusionExplanation
Cold lap refers to a welding defect where there is an incomplete fusion between the base metal and the weld metal. This occurs when the temperature of the base metal is too low to allow proper fusion, resulting in a weak joint. It is characterized by a visible line or gap between the base metal and the weld metal. Therefore, the correct answer is "Lack of fusion."Rate this question:
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- 25.
When a medium to high carbon steel is quenched:
- A.
It becomes malleable
- B.
Its hardness increases
- C.
It becomes ductile
- D.
The plasticity is increased
Correct Answer
C. It becomes ductileExplanation
When a medium to high carbon steel is quenched, the rapid cooling process causes the carbon atoms to be trapped within the crystal structure of the steel. This results in the formation of a hard and brittle material. However, the process of quenching also introduces internal stresses within the steel. These stresses can be relieved by tempering, which involves heating the steel to a specific temperature and then cooling it slowly. This tempering process helps to increase the ductility of the steel, making it less prone to cracking or breaking under stress. Therefore, the correct answer is that the steel becomes ductile after quenching.Rate this question:
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- 26.
The TIG welding process utilizes an electrode that is:
- A.
Cellulosic
- B.
Non-consumable
- C.
Consumable
- D.
None of the above
Correct Answer
B. Non-consumableExplanation
The TIG welding process utilizes a non-consumable electrode, which means that the electrode does not melt or get consumed during the welding process. Instead, the electrode is made of a material with a high melting point, such as tungsten, and it transfers the heat to the workpiece without melting. This allows for precise control over the welding process and produces high-quality welds.Rate this question:
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- 27.
Another name for Suck back in the root of a weld is:
- A.
Concavity
- B.
Convexity
- C.
LORP
- D.
Root undercut
Correct Answer
A. ConcavityExplanation
Concavity is another name for suck back in the root of a weld. Suck back refers to the phenomenon where the molten metal in a weld pool is drawn back into the weld cavity as it cools down. This can result in a concave shape in the root of the weld, hence the term "concavity". It is important to control and minimize suck back to ensure the integrity and strength of the weld.Rate this question:
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- 28.
One of the advantages of a multi-pass MMA weld is that it generally produces a:
- A.
High tensile strength
- B.
High degree of ductility
- C.
Coarse grain structure
- D.
Fine grain structure
Correct Answer
A. High tensile strengthExplanation
A multi-pass MMA weld generally produces a high tensile strength because multiple passes allow for better fusion and penetration between the base metals, resulting in a stronger bond. This is especially beneficial in applications where high strength is required, such as structural welding or heavy machinery. The multiple passes also help to distribute any residual stresses more evenly, further enhancing the overall strength of the weld.Rate this question:
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- 29.
The British code for visual inspection requirements is:
- A.
BS 4872
- B.
BS 499
- C.
BS 4870
- D.
None of the above
Correct Answer
D. None of the above -
- 30.
A code of practice for visual inspection should cover the following:
- A.
Before, during and after welding activities
- B.
Before welding activities only
- C.
After welding activities only
- D.
None of the above
Correct Answer
A. Before, during and after welding activitiesExplanation
A code of practice for visual inspection should cover before, during, and after welding activities to ensure that all necessary inspections are conducted at every stage of the welding process. This comprehensive coverage ensures that any potential issues or defects are identified and addressed promptly, minimizing the risk of faulty welds and ensuring the quality and safety of the final product. By including inspections before, during, and after welding activities, the code of practice ensures that all critical points in the welding process are thoroughly checked and monitored.Rate this question:
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