Workshop Technology
In a unilateral system of tolerance, the tolerance is allowed on

One side of the nominal size
Both sides of the actual size
One side of the actual size
Both sides of the nominal size

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Workshop Technology
The diaphragm moulding machine is used to

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

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