One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 481
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Single-choice question: What type of personal protective mask should be used when cleaning a polymerization reactor? A. Cotton mask B. Carbon filter mask C. Mask with a long tube or an oxygen tank Answer: C. Mask with a long tube or an oxygen tank
The personal protective mask to be used when cleaning the polymerization reactor is (c).
That must be the best one; choose C
C Long-tube mask or mask with an oxygen tank: The personal protective mask to be used when cleaning polymerization reactors is (C)
The personal protective mask to be used when cleaning the polymerization reactor is (C). A Cotton mask B Carbon filter mask C Long-tube mask or mask with an oxygen tank