洁净室及洁净区空气中悬浮粒子洁净度等级共划分为( )等级。A.6 B.9 C.10 D.12

作者: rantiku 人气: - 评论: 0

问题洁净室及洁净区空气中悬浮粒子洁净度等级共划分为( )等级。

选项 A.6 B.9 C.10 D.12

答案 B

解析空气净化的标准常用空气洁净度等级来衡量，空气洁净度主要控制空气中最小控制微粒直径和微粒数量，即每立方米体积中允许的最大粒子数来确定。现行规范规定了N1级至N9级的9个洁净度等级。

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