Materials Science and Manufacturing Engineering Miscellaneous
- In DC welding, the straight polarity (electrode negative) results in
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Lower penetration because of 2/3rd heat is generated at work piece so lower deposition rate of consumable electrode or filter material can be observed.
Correct Option: B
Lower penetration because of 2/3rd heat is generated at work piece so lower deposition rate of consumable electrode or filter material can be observed.
- At small variations of arc length at operating conditions, the manual metal arc welding transformer provides nearly
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Constant current type of transformer is used in Manual Arc welding otherwise weld bead of irregular shape and penetration
Correct Option: D
Constant current type of transformer is used in Manual Arc welding otherwise weld bead of irregular shape and penetration
- Penetration is increased by
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By increasing the current, large heat is generated and due to lesser speed heat is generated at particular area so that larger penetration can be carried out.
Correct Option: B
By increasing the current, large heat is generated and due to lesser speed heat is generated at particular area so that larger penetration can be carried out.
- Which of the following powders should be fed for effective oxy-fuel cutting of stainless steel.
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Powder of steel is used with oxygen such a flame. This powder burns producing large amount of heat facilitating cutting.
Correct Option: A
Powder of steel is used with oxygen such a flame. This powder burns producing large amount of heat facilitating cutting.
- The composition of an oxyacetylene flame for cutting of steel contain more oxygen.
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Yes. Oxyacetylene gas cutting is an oxidation process.
Correct Option: A
Yes. Oxyacetylene gas cutting is an oxidation process.
