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Vacuum mixing systems reduce the exposure by _________ %.(a) 20(b) 40(c) 50(d) 10This question was posed to me in unit test.I'd like to ask this question from Hot Weather Concreting, Prepacked and Vacuum Cement topic in division Special Concrete and Concreting Methods of Concrete Technology |
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Answer» CORRECT CHOICE is (c) 50 Easy explanation: Vacuum mixing SYSTEM decreases the exposure by 50 % to 70% and eliminates the CONTACT with the bone cement while delivery. |
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