📊 Concrete Technology
Q. A small quantity of …………. % of gypsum is added to prevent flash-setting of the cement.
  • (A) 1 to 2
  • (B) 2 to 3
  • (C) 9 to 10
  • (D) 10 to 12
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✅ Correct Answer: (B) 2 to 3

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