Manufacturing And Production Technology
The primary purpose of a sprue in a casting mould is to

Feed the casting at a rate consistent with the rate of solidification
Act as a reservoir for molten metal
Feed molten metal from the pouring basin to the gate
Help feed the casting until all solidification takes place

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Manufacturing And Production Technology
The snag grinding is done

To produce good surface finish and high degree of accuracy
To remove considerable amount of metal without regard to accuracy of the finished surface
Any one of the above
To grind exterior cylindrical surfaces

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Manufacturing And Production Technology
The strength of a brazed joint

Increases up to certain gap between the two joining surfaces beyond which it decreases
Decreases up to certain gap between the two joining surfaces beyond which it increases
Increases with increase in gap between the two joining surfaces
Decreases with increase in gap between the two joining surfaces

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