Workshop Technology
The purpose of a riser is to

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

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Spot welding is used for welding

Lap joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having thickness above 3 mm

ANSWER DOWNLOAD EXAMIANS APP