ITI Fitter Question Paper 2017 Fourth Semester (Set - 1) with Answer Key

List of case hardening or surface hardening methods are 
Carburising 
Cyaniding 
Nitriding 
Induction hardening 
Flame hardening

Key Properties of Copper
Excellent heat conductivity.
Excellent electrical conductivity.
Good corrosion resistance.
Good biofouling resistance.
Good machinability.
Retention of mechanical and electrical properties at cryogenic temperatures.
Non-magnetic