2. What name is given to the metallurgical process used to coat steel or iron with zinc?
3. Minamata disease is related with _________________.
4. Which among the following gases are used in different types of welding?
[A]Oxygen, hydrogen, acetylene and nitrogen
[B]Oxygen and hydrogen
[C]Oxygen and acetylene
[D]Oxygen, acetylene and argon
5. One Nautical Mile is equivalent to how many meters?