Trivia Questions On CSWIP 3.1 Welding Inspector Test!

The welder qualification test is conducted to verify the skill of the welder. This test aims to assess the welder's ability to perform welding tasks according to specific standards and requirements. It ensures that the welder has the necessary expertise and proficiency to produce high-quality welds that meet the desired specifications. The test evaluates various aspects of the welder's skills, such as their understanding of welding techniques, ability to interpret welding symbols, knowledge of welding procedures, and proficiency in handling welding equipment. By passing this test, the welder demonstrates their competence and suitability for performing welding tasks in a professional setting.

TIG (Tungsten Inert Gas) welding is the correct welding process out of the given options. TIG welding uses a tungsten electrode to create an arc that melts the metal being welded, while an inert gas (usually argon) protects the weld area from atmospheric contamination. TIG welding is commonly used for precise and high-quality welds on thin materials, as it allows for better control over the heat input and produces clean and aesthetically pleasing welds.

Using manual metal arc electrodes, stripped of flux, as filler wire for TIG welding can lead to incorrect weld metal composition. The composition of the electrode is specifically designed for manual metal arc welding, where the flux plays a crucial role in shielding the weld pool from atmospheric contamination. Without the flux, the weld metal may be exposed to impurities, resulting in an incorrect composition and potentially compromising the quality and strength of the weld. Therefore, using stripped electrodes as filler wire for TIG welding would not be advisable.

The increase in carbon and manganese content in the steel composition can lead to an increase in the susceptibility to cracking in the weld area. Higher carbon content can result in increased hardenability, making the steel more prone to cracking during the welding process. Similarly, higher manganese content can also contribute to the formation of brittle phases, which can further increase the risk of cracking. Therefore, the change in steel composition can potentially influence the incidence of cracking in the weld area.

DWSI stands for Double Wall Single Image. It is a radiographic testing technique used to inspect welds in pipes. In this method, the radiation source is placed outside the pipe, and the film is placed inside. The resulting radiograph shows a single image of the weld, even though the radiation has passed through both walls of the pipe. This technique is commonly used for pipes with diameters greater than 80mm.

If a welder is found to be working outside the parameters of the procedure, it means that they are not following the approved guidelines and specifications for welding. In such a case, the welding inspector has the authority to revoke the welder's approval. This is because working outside the set parameters can result in faulty welds, compromising the quality and integrity of the welded joints. The welding inspector's role is to ensure that all welders adhere to the approved procedures to maintain the highest standards of safety and quality in welding operations.

A side bend test specimen would show lack of inter-run fusion in a carbon steel butt weld. This is because a side bend test involves bending the specimen to examine the weld fusion along the side of the weld joint. If there is a lack of fusion between the different runs of the weld, it will be visible during the bending process. In contrast, a face bend test examines the fusion on the surface of the weld, a guided bend test examines the fusion at the root of the weld, and a root bend test examines the fusion at the root of the weld.

Carbon has the greater effect on the hardenability of a steel plate compared to the other elements listed. Hardenability refers to the ability of a steel to be hardened through heat treatment. Carbon plays a crucial role in this process as it forms carbides, which are responsible for increasing the hardness of the steel. The higher the carbon content, the greater the hardenability of the steel. In contrast, while elements like sulphur, molybdenum, and chromium can also affect the properties of steel, they do not have as significant an impact on hardenability as carbon does.

Argon is the recommended gas shroud for tungsten arc gas shielded welding of aluminium alloys. Argon is an inert gas that helps to create a protective atmosphere around the weld, preventing oxidation and contamination. It is commonly used for welding non-ferrous metals like aluminium because it does not react with the metal. Nitrogen and carbon dioxide are not suitable for this type of welding as they can cause porosity and other defects in the weld. An argon/carbon dioxide mixture may be used in some cases, but pure argon is generally preferred for welding aluminium alloys.

Linear slag inclusions are not expected to be found by visual inspection of welds. Slag inclusions occur when molten slag becomes trapped in the weld metal during the welding process. However, linear slag inclusions are typically not visible on the surface of the weld and may require more advanced inspection techniques such as radiography or ultrasonic testing to detect. Therefore, they would not be expected to be identified through visual inspection alone.

Proof stress is indeed used when non-ferrous metals are undergoing tensile tests to determine the equivalent Yield strength. During a tensile test, a non-ferrous metal is subjected to increasing tensile forces until it reaches its breaking point. The proof stress is the stress at which a material begins to exhibit permanent deformation, and it is an indicator of the yield strength of the material. By measuring the proof stress, one can determine the equivalent yield strength of the non-ferrous metal being tested. Therefore, the statement "Proof stress is used when non-ferrous metals are undergoing tensile tests to determine the equivalent Yield strength" is true.

Adjusting the inductance control can help in finely controlling spatter during MIG / MAG welding. Inductance control refers to the adjustment of the inductance level in the welding machine. By adjusting this control, the welder can regulate the rate at which the welding current rises and falls. This can have an impact on the spatter produced during the welding process. By finding the right balance of inductance, the welder can minimize spatter and achieve a cleaner weld.

In multi-run welding, each subsequent weld pass introduces heat to the previously deposited weld metal. This heat can cause microstructural changes, including recrystallization. Recrystallization is a process where new, strain-free grains form within the existing weld metal, refining the grain structure and improving the mechanical properties of the weld. While the other options relate to heat treatment processes, they don't specifically describe the refinement process in multi-run welds.

During the service life of a structure, it is subjected to repeated loading and unloading, which can lead to the development of fatigue cracking. Fatigue cracking occurs when the structure is exposed to cyclic stresses that are below the yield strength of the material but still cause damage over time. This type of defect is commonly found in structures due to the accumulation of small cracks that grow and propagate under repeated loading, eventually leading to failure if not addressed. Crystallisation, weld decay, and stress fracture are also types of defects but are less common compared to fatigue cracking.

Fatigue testing is used to test welds under cyclic loading. This is because cyclic loading involves the application of repeated stress cycles to the weld, simulating real-life conditions where the weld may be subjected to fluctuating loads over time. Fatigue failure can occur when the weld is repeatedly stressed, leading to crack initiation and propagation. By subjecting the weld to cyclic loading in fatigue testing, its resistance to such failure can be evaluated, ensuring its durability and reliability in practical applications.

If the pipe bores are not matched correctly, it can result in a lack of root penetration. This means that the weld does not fully penetrate the base metal, leading to a weak joint. This can compromise the structural integrity of the pipe, causing potential leaks or failures.

A macro section of a 'T' butt joint that shows a step-like defect lying outside the visible HAZ indicates the presence of lamellar tearing. Lamellar tearing is a type of defect that occurs during the welding process when the steel plate has a high level of internal stress. These stresses can cause the material to tear along the grain boundaries, resulting in a step-like appearance. This defect is typically found outside the heat-affected zone (HAZ) and can weaken the joint, making it susceptible to failure under stress.

Stove welding is a type of welding process that requires a coating on the electrode to provide protection and control the welding arc. The cellulosic coating is specifically designed for this purpose. It contains a high amount of cellulose, which creates a gas shield during welding that helps to stabilize the arc and protect the weld pool. This coating is commonly used for welding pipes and pressure vessels, as it produces a deep penetration and strong welds. The other coatings mentioned, such as rutile, basic, and oxidizing, are not typically associated with stove welding.

Charpy impact testing is more likely to reveal HAZ (Heat Affected Zone) embrittlement. HAZ embrittlement is a phenomenon that occurs in the heat-affected zone of a weld, where the material becomes brittle and prone to cracking. Charpy impact testing measures the impact energy absorbed by a material when subjected to a high-velocity impact, and it can detect the presence of embrittlement by measuring the decrease in impact energy. Transverse tensile and all weld tensile tests primarily measure the tensile strength of a material, while root bend tests assess the ductility and soundness of a weld.

The unit of Joules would not be used to measure tensile strength. Tensile strength is measured in units of force per unit area, such as pounds per square inch (psi) or newtons per square meter (N/m^2). Joules, on the other hand, are used to measure energy or work done.

GTAW, also known as TIG (Tungsten Inert Gas) welding, uses a tungsten electrode that does not melt during the welding process. The arc is struck between the tungsten electrode and the workpiece, creating the heat needed to melt the base metal. A separate filler metal may be used to add material to the weld joint. In contrast, SMAW, GMAW, and FCAW all use consumable electrodes that melt and become part of the weld.

Elasticity refers to the property of a metal to return to its original shape after being deformed. When a force is applied to a metal, it undergoes temporary deformation, but once the force is removed, the metal regains its original shape. This ability to recover from deformation is known as elasticity. Elastic materials can stretch or compress under stress, but they will always return to their original form once the stress is released. This property makes metals highly useful in various applications where flexibility and resilience are required.

Symbol A from EN 22553 would indicate that a weld has to be finished on the 'other' side of the weld.

Lamellar tearing is a type of defect that occurs in steel fabrication due to the presence of non-metallic inclusions. These inclusions are difficult to detect using inspection methods such as dye penetrant, ultrasonic inspection, or X-ray examination. This is because the defect is not visible on the surface and cannot be detected using traditional non-destructive testing methods. Therefore, it would not have been found by any inspection method.

An Izod impact machine is used to give indication of the ductility of a material. Ductility refers to the ability of a material to undergo plastic deformation without breaking or fracturing. The Izod impact test measures the energy absorbed by a material when it is struck by a pendulum, which helps determine its resistance to fracture and its ability to withstand sudden impact or shock. Therefore, the correct answer is ductility.

Pearlite is the correct answer because it is the tough laminated structure that is formed on slow cooling of ferrite and iron carbide (cementite). It consists of alternating layers of ferrite and cementite, giving it a characteristic appearance under a microscope. This structure provides a good combination of strength and ductility, making it desirable for certain applications in materials engineering.

Rutile High Recovery is the correct MMA welding rod because it offers high recovery rates, meaning that it has a high deposition efficiency and can provide a higher amount of weld metal compared to other rods. This makes it suitable for applications where a strong and efficient weld is required.

Sulphur and phosphorus are not alloying elements; they are impurities. Impurities are substances that are present in a material but are not desired or intentionally added. In the context of alloys, impurities can have negative effects on the properties and performance of the alloy. Therefore, it is important to control the levels of impurities, such as sulphur and phosphorus, in alloys to ensure their quality and desired characteristics.

Welder qualification tests focus on evaluating the welder's ability to apply their skills and knowledge to produce welds that meet specific quality standards. These tests assess the welder's technique, control, and understanding of the welding process. While welding procedures and material weldability are important factors, they are typically validated through separate procedure qualification tests and material testing, respectively.

Quenching involves rapidly cooling a heated metal, such as carbon or low alloy steel, in order to increase its hardness. The rapid cooling prevents the formation of large crystals, resulting in a harder material. However, this process also decreases the ductility of the steel, making it less able to withstand deformation without breaking. Therefore, quenching a carbon or low alloy steel will result in an increase in hardness and a decrease in ductility.