Workshop Technology
For welding plates of thickness more than 12.5 mm, its edges

Should have a double-V or U-groove on one side
Do not require bevelling
Should have a double-V or U-groove on both sides
Should be bevelled to a single-V or U-groove

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
The purpose of a riser is to

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
Deliver molten metal into the mould cavity

ANSWER DOWNLOAD EXAMIANS APP