Manufacturing And Production Technology
Glazing in grinding wheels takes place when the

Wheel is too soft or wheel revolves at a very slow speed
Wheel is too hard and wheel revolves at very slow speed
Wheel is too hard or wheel revolves at a very high speed
Wheel is too soft and wheel revolves at a very high speed

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

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

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