某空气处理室设有两级过滤器，按质量浓度计，粗效过滤器的过滤效率为80%，中效过滤器的过滤效率为90%，则该空气处理室过滤器的总效率是(　　)。 -题库考试答案搜索网

某空气处理室设有两级过滤器，按质量浓度计，粗效过滤器的过滤效率为80%，中效过滤器的过滤效率为90%，则该空气处理室过滤器的总效率是(　　)。

单选题

2021-07-17 22:26

A、85%
B、90%
C、95%
D、98%

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正确答案

A

试题解析

标签：建筑工程类公用设备师给水排水公用设备师《给排水》考试练习题

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