Which of the following clay mixing devices is vacuum operated for deairation of clay ?
Correct answer: B. Pug mill
- A. Banbury mixer
- B. Pug mill
- C. Muller-mixer
- D. None of these
Explanation
A vacuum pug mill mixes and kneads clay while removing entrained air under vacuum, producing a dense, uniform clay body. Ordinary mullers and Banbury mixers do not specifically provide this standard vacuum deairing arrangement.
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