Workshop Technology
Thermit welding is often used in

Joining rails, truck frames and locomotive frames etc.
Replacing broken gear teeth
Repairing broken shears
All of these

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
The purpose of a riser is to

Deliver molten metal into the mould cavity
Deliver the molten metal from pouring basin to gate
Feed the molten metal to the casting in order to compensate for the shrinkage
Act as a reservoir for the molten metal

ANSWER DOWNLOAD EXAMIANS APP