all the answers for chapter 11 . 45 Questions
A gap may require narrow, less penc forehand welding e wide more penetrataos 2, Is there any benefit to the mi scale that can be found on almost all hol rolled steel weld a. It can help the deoxidizers in the filler metal to react with the weld lo make a better b. It can help to prevent nust from forming. getting too wide. cliacts like a drm along the sides orthe weld poolto keep the weld baad from d No it has no benefit. which may cause 3. Adding axygen or carbon dioxide to an inert gas causes the shielding gas to become in some ferrous materia oidizing, spalter a. inert ovidzing c, oxidizing, porosity d inert,porosity an extension bealigned with the grooved aler? 4, How should the condut a. These parts are preset in the factory and must not be changed in the field. b They should be lightly touching the rollers so that the welding current can flow down the wire to the welding gun c Ain. (13 mm) from the grooves in the roller to prevent arcing d Set as close as potessible without touching the roller. 5.What can be doce to keep the spatter to a minimum when using co2 as the shielding gas?
1. b : A Narrow Gap may require less pentration
This welding procedure uses joint preparations with small, included angles, typically in the range 2-20°, which require less weld metal and less welding time to fill.
2. b: It can help to prevent rust from the forming
Mill scale is thus a boon for a while until its coating breaks due to handling of the steel product or due to any other mechanical cause.
3. C : Oxidizing and Porosity
Oxygen causes oxidation of the weld, so it is not suitable for welding aluminium, magnesium, copper, and some exotic metals. Increased oxygen makes the shielding gas oxidize the electrode, which can lead to porosity in the deposit if the electrode does not contain sufficient deoxidizers.
4. D
The conduit or an extension should be aligned with the groove in the roller and set as close to the roller as possible without touching
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