Disadvantage of having a short sprue is________________?
Correct answer: C. Incomplete evacuation of gases
- A. Rapid solidification of metal
- B. No place for reservoirs
- C. Incomplete evacuation of gases
- D. Difficulty in removing casting from investment
Explanation
A short sprue may not provide adequate length for gases to escape from the mold, causing gas entrapment and incomplete casting. Reservoir placement is a separate issue related mainly to the sprue-reservoir design.
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