This is a well established and extremely versatile method of welding. Submerged-arc welding (SAW) involves the formation of an arc between a continuously fed electrode and the work piece.
A blanket of powdered flux, which generates a protective gas shield and a slag (and may also be used to add alloying elements to the weld pool), protects the weld zone. A shielding gas is not required.
117) Which of the following welding method uses a pool of molten metal?
Answer is:
Submerged arc welding
Explanation:
Related Workshop Technology MCQ with Answers
Answer is:
bare metal electrode and the work
Explanation:
Submerged arc welding is an arc welding process in which heat is generated by an arc which is produced between bare consumable electrode wire and the workpiece.
Answer is:
MIG arc welding
Explanation:
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together. A shielding gas is also sent through the welding gun and protects the weld pool from contamination. In fact, MIG stands for metal inert gas.
Answer is:
either (a) or (b)
Explanation:
In TIG arc welding, The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas argon or helium.
Answer is:
direct current with straight polarity is used
Explanation:
In welding copper alloys with TIG arc welding Direct current with straight polarity is used.
Copper and copper-base alloys have specific properties which make them widely used. Their high electrical conductivity enable their use in the electrical industries, and the corrosion resistance of certain alloys makes them very useful in the process industries.