1. How can you tell whether cavities in a casting are due to shrinkage or entrained air bubbles? 2..

1. How can
you tell whether cavities in a casting are due to shrinkage or entrained air
bubbles?

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2. Describe
the drawbacks to having a riser that is (a) too large and (b) too small.

3. List the
process variables that affect the fluidity index.