Multiple choice

The major difficulty during welding of aluminium is due to its

  1. high tendency of oxidation

  2. high thermal conductivity

  3. low melting point

  4. low density

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aluminium has high tendency of oxidation so during welding it is converted into aluminium oxide (Al2O3) and Al2O3 has very high melting point (2702oC) so now it will not melt and welding can not be performed easily.