CSWIP 3.1- Model Paper-2

1. Lack of fusion imperfections are defined as?

Lack of union between two adjacent areas of material

Not cleaning out slag

Incorrect electrode manipulation in the final run

Incorrect set up

Lack of fusion imperfections refer to the absence of a proper bond between two adjacent areas of material. This means that there is a failure to achieve a complete fusion or joining of the materials, resulting in a lack of union. This can occur due to various factors such as improper welding techniques, inadequate heat input, or incorrect electrode manipulation. It is important to address these issues to ensure a strong and reliable weld.

Explanation

Lack of fusion imperfections refer to the absence of a proper bond between two adjacent areas of material. This means that there is a failure to achieve a complete fusion or joining of the materials, resulting in a lack of union. This can occur due to various factors such as improper welding techniques, inadequate heat input, or incorrect electrode manipulation. It is important to address these issues to ensure a strong and reliable weld.

2. Undercut can be defined as one of the following?

Concavity in the root of the weld

Crater in the fill of the weld

An oxide within the weld

Depression at the toe of the weld

Undercut refers to a depression or groove that forms at the toe of a weld. It is caused by excessive heat or improper welding technique, resulting in the melting away of the base metal. This depression weakens the weld joint and can lead to structural failure. Therefore, the correct definition of undercut in welding is a depression at the toe of the weld.

Explanation

Undercut refers to a depression or groove that forms at the toe of a weld. It is caused by excessive heat or improper welding technique, resulting in the melting away of the base metal. This depression weakens the weld joint and can lead to structural failure. Therefore, the correct definition of undercut in welding is a depression at the toe of the weld.

3. Excess penetration is often caused by which of the following?

Too high a welding current

Slow travel speed

Large root gap

All of the above

Excess penetration in welding refers to the excessive depth of the weld pool, which can weaken the joint. It is caused by various factors, including too high a welding current, slow travel speed, and a large root gap. When the welding current is too high, it generates excessive heat, leading to excessive penetration. Similarly, a slow travel speed allows more time for the heat to be absorbed, resulting in deeper penetration. A large root gap creates a larger space for the molten metal to flow into, causing excessive penetration. Therefore, all of the above factors can contribute to excess penetration in welding.

Explanation

Excess penetration in welding refers to the excessive depth of the weld pool, which can weaken the joint. It is caused by various factors, including too high a welding current, slow travel speed, and a large root gap. When the welding current is too high, it generates excessive heat, leading to excessive penetration. Similarly, a slow travel speed allows more time for the heat to be absorbed, resulting in deeper penetration. A large root gap creates a larger space for the molten metal to flow into, causing excessive penetration. Therefore, all of the above factors can contribute to excess penetration in welding.

4. All things contain imperfections, but is only when they fall outside the level of acceptance they should be termed?

Discontinuity

Defect

Mechanical damage

Welding imperfections

Defects refer to imperfections that exceed the acceptable level. While all things have imperfections, only those that fall outside the acceptable range should be considered defects. This term is used to describe flaws or faults that affect the functionality, quality, or appearance of an object. It implies that the item does not meet the required standards or specifications.

Explanation

Defects refer to imperfections that exceed the acceptable level. While all things have imperfections, only those that fall outside the acceptable range should be considered defects. This term is used to describe flaws or faults that affect the functionality, quality, or appearance of an object. It implies that the item does not meet the required standards or specifications.

5. A singular gas filled cavity that is= or more than 1.6 mm in diameter is termed?

Cavity

Cluster porosity

Blow hole

Rounded porosity

A singular gas filled cavity that is equal to or more than 1.6 mm in diameter is termed a blow hole.

Explanation

A singular gas filled cavity that is equal to or more than 1.6 mm in diameter is termed a blow hole.

6. What should happen to spatter before visual inspection is carried out?

Spatter is not a problem for visual inspection

Spatter that is more than 2 mm need not be cleaned for visual inspection

Spatter should be cleaned off before visual inspection

Spatter will not have any affect on the weld or the base material

Spatter should be cleaned off before visual inspection. This is because spatter, which refers to the unwanted bits of molten metal expelled during welding, can obstruct the view and make it difficult to properly assess the weld. Cleaning the spatter ensures a clear and accurate visual inspection of the weld and the base material.

Explanation

Spatter should be cleaned off before visual inspection. This is because spatter, which refers to the unwanted bits of molten metal expelled during welding, can obstruct the view and make it difficult to properly assess the weld. Cleaning the spatter ensures a clear and accurate visual inspection of the weld and the base material.