Workshop Technology
Loam sand is a mixture of

70% sand and 30% clay
30% sand and 70% clay
90% sand and 10% clay
50% sand and 50% clay

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Workshop Technology
Rotary swaging

Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
Is extensively used for making bolts and rivets
Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

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Workshop Technology
Riddle is used for

Cleaning the moulding sand
Moistening the sand around the edge before removing pattern
Reinforcement of sand in the top part of moulding box
Smoothing and cleaning out depressions in the mould

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