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Question On Welding 59 PDF

The document contains questions about welding processes and tests. It asks which physical test would be more likely to reveal heat-affected zone (HAZ) embrittlement, which test indicates the toughness of the weld metal and parent metal in the HAZ, and what preheating temperature would be required for welding a steel plate with a carbon equivalent of 0.45. It also asks about a macro section showing a step-like defect outside the HAZ and what this could signify. Finally, it asks why cellulosic electrodes are often used for the root pass of pipe welds in the field and why austenitic stainless steel electrodes are generally shorter than mild steel electrodes.

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237 views1 page

Question On Welding 59 PDF

The document contains questions about welding processes and tests. It asks which physical test would be more likely to reveal heat-affected zone (HAZ) embrittlement, which test indicates the toughness of the weld metal and parent metal in the HAZ, and what preheating temperature would be required for welding a steel plate with a carbon equivalent of 0.45. It also asks about a macro section showing a step-like defect outside the HAZ and what this could signify. Finally, it asks why cellulosic electrodes are often used for the root pass of pipe welds in the field and why austenitic stainless steel electrodes are generally shorter than mild steel electrodes.

Uploaded by

Xerex
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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c. Excessive penetration.

d. Excessive bead height.

HAZ

Which physical test is more likely to reveal HAZ embrittlement?


a. Transverse tensile.
b. All weld tensile.
c. Root bend.
d. Charpy impact.

Which of the following tests would indicate the toughness of weld metal/parent metal -
HAZ?
a. Macro
b. Nick break
c. Hardness
d. Charpy vee notch

Welding a steel plate with a CE of 0.45 would require preheating to:


a. Prevent the formation of sulphides
b. Prevent hardening in the HAZ
c. Prevent the formation of carbides
d. To improve mechanical properties in the weld

You have a macro section of a 'T' butt joint that shows a step-like defect lying outside the
visible HAZ. What would this defect possibly signify?
a. HAZ cracking.
b. Toe cracking.
c. Lamination.
d. Lamellar tearing.

Electrodes

. Cellulosic electrodes are often used when welding the root pass of pipes in the field
because:
a. Hydrogen control is needed
b. There are iron powders in the electrode
c. Higher arc voltage can be obtained
d. Shorter arc length can be obtained

Austenitic stainless steel electrodes are generally smaller in length than mild steel electrodes
because:
a. High amperage is used
b. Shelf life will be decreased
c. Their electrical conductivity is less than that of steel

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