Workshop Technology
In sheet metal work, he cutting force on the tool can be reduced by

Grinding the cutting edges sharp
Increasing the hardness of die
Providing shear on tool
Increasing the hardness of tool

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Workshop Technology
In permanent mould casting method

Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is forced into mould under high pressure
None of these
Molten metal is poured and allowed to solidify while the mould is revolving

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Workshop Technology
A jolt machine is used to

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

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