Necking is

A.Machining a groove around cylindrical shaft
B.Drilling a hole in a plate
C.Hole drilled for riveting
D.Preparation of surface for brazing
E.Initial spot welding to position jobs

A stick is

A.Automatic moulding tool
B.A device for measuring moisture content in foundry sand
C.A hand tool for repairing mould in foundry shop
D.A tool for mostening the sand
E.A tool for lifting the pattern from mould

A 30 ton press means

A.Gross weight of the press is 30 tons
B.The weight of die is 30 tons
C.The pressure exerted by slide is 30 tons
D.The flywheel of the press weighs 30 tons
E.The quantity of work produced in 8 hours will be 30 tons