Workshop Technology
Thermit, used in Thermit welding, is a mixture of

Iron oxide and aluminium
Charcoal and iron oxide
Charcoal and aluminium
Charcoal, iron oxide and aluminium

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Piercing is an operation of cutting

A flat sheet to the desired shape
A number of holes evenly spaced in a regular pattern on a sheet of metal
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A cylindrical hole in a sheet of metal by the punch and the die

ANSWER DOWNLOAD EXAMIANS APP