| 31. | At what temperature should the metal be kept? |
| 32. | What happens when too much metal is in the pot? |
| 33. | What does a slug show when the metal is too hot? |
| 34. | What does the slug show when the metal is too cold? |
| 35. | What does a smooth, bright bottom on a slug indicate? |
| 36. | What are some of the causes of a defective face? |
| 37. | How should the mouthpiece be cared for? |
| 38. | How is the mouthpiece removed on the wedge style |
| | crucible? Screw style models? |
| 39. | How is a “stuck” plunger taken out and cleaned? |
| 40. | How is the metal pot adjusted? Give all adjustments. |