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.
120) In TIG arc welding, the welding zone is shielded by an atmosphere of
Answer is:
either (a) or (b)
Explanation:
Related Workshop Technology MCQ with Answers
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.
Answer is:
TIG welding
Explanation:
Gas tungsten arc welding (GTAW), or tungsten/inert-gas (TIG) welding, is a manual welding process that uses a non-consumable electrode made of tungsten, an inert or semi-inert gas mixture, and a separate filler material.
Answer is:
iron oxide and aluminum
Explanation:
Thermit which is used in Thermit welding is a mixture of Iron oxide and aluminium.
Answer is:
all of the above
Explanation:
Advantages of thermit welding is listed below:
The weld formed has high mechanical strength, excellent corrosion resistance as compared with other forms of weld.
It is highly stable to repeated short circuit pulses the electrical resistance remains unchanged over lifetime of the installation
All parts of the weld section are molten at the same time Weld cools almost uniformly
Results in a minimum problem with internal residual stresses.