Machine moulding of dry mixture of refractories requires a pressure of the order of _____________ kg/cm2?
Correct answer: D. 1000
- A. 10
- B. 100
- C. 500
- D. 1000
Explanation
Dry mixtures of refractory materials are compacted by high-pressure machine moulding, typically of the order of 1000 kg/cm². Lower pressures such as 10 or 100 kg/cm² are insufficient for proper densification.
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