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

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

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
The diaphragm moulding machine is used to

Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Give uniform sand hardness throughout the mould
Ram the sand harder at the back of the mould and softer on the pattern face

ANSWER DOWNLOAD EXAMIANS APP