Maximum water percentage in refractory mix meant for hand moulding may be as high as _____________ percent?
Correct answer: D. 14-20
- A. 2-3
- B. 5-7
- C. 7-12
- D. 14-20
Explanation
A refractory mix prepared for hand moulding may require relatively high moisture for plasticity, with the maximum commonly taken as about 14 to 20 percent. The lower ranges are more typical of drier forming methods.
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