Workshop Technology
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.

Drop core
Vertical core
Horizontal core
Balanced core

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Workshop Technology
The diaphragm moulding machine is used to

Give uniform sand hardness throughout the mould
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
Ram the sand harder at the back of the mould and softer on the pattern face

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