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Answer : 4. "oxygen and acetylene"
The gases used in different types of welding would include
5Q:
The gases used in different types of welding would include
- 1oxygen and hydrogenfalse
- 2oxygen, hydrogen, acetylene and nitrogenfalse
- 3oxygen, acetylene and argonfalse
- 4oxygen and acetylenetrue
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Answer : 4. "oxygen and acetylene"
Explanation :
Acetylene is the only fuel gas suitable for gas welding because of its favourable flame characteristics of both high temperature and high propagation rates. Other fuel gases, such as propane, propylene or natural gas, produce insufficient heat input for welding but are used for cutting, torch brazing and soldering.