Workshop Technology
The binder commonly used in making oil sand, is

Inorganic type binder
Organic type binder
Any one of the listed here
Clay type binder

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Workshop Technology
A jolt machine is used to

Ram the sand harder at the back of the mould and softer on the pattern face
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Produce uniform packing of sand in the mould
Produce uniform sand hardness throughout the mould

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