来自 昏昏睡睡HSE · From Drowsy HSE CSP DAILY LEARNING · DAY 64

职业暴露控制基础 · 术语精讲 | Occupational Exposure Control Basics · Glossary Focus

第 12 块 · Domain 1 · 安全原理高级应用 · 25%Block 12 · Domain 1 · Advanced Application of Safety Principles · 25%第 3 / 5 课 · 术语精讲Lesson 3 of 5 · Glossary Focus

本课只做一件事：把「职业暴露控制基础」的 6 个高频英文术语从「眼熟」变成「能用」：定义、易混、例句。

Turn the six high-frequency terms of Occupational Exposure Control Basics from familiar to usable: definition, look-alike, example.

本课不涉及：不扩到别的板块的术语，也不考题型技巧。
Not covered here: No terms from other blocks, no question-technique work.

本课目标 | Learning objectives

  1. 为每个术语说出定义，而不是只给中文对应词
  2. 指出每一对易混词差在哪一个限定条件上
  3. 把每个术语放进一句真实的现场英文里

  • Define each term rather than translate it
  • Point to the exact qualifier that separates each look-alike pair
  • Put each term into one real site sentence

    • 图片预览 / Photo preview

    图片经过压缩后保存在当前浏览器。导出失败时，可在下方预览图片上长按保存。/ The photo is compressed and stored in this browser. If download fails, long-press the preview below to save it.

    术语详解 | Glossary in depth

    Breathing Zone / 呼吸带
    以口鼻为圆心约 30 cm 半径的半球空间，个体采样的挂点位置。
    The hemisphere within about 30 cm of the nose and mouth — where a personal sampler is clipped.
    易混 / Easily confused：与「车间空气」不同：定点浓度与实际吸入量可以差数倍。
    Not 'shop air': fixed-point concentration and actual inhaled dose can differ several-fold.
    例句 / In a sentence：The sampler rode in the breathing zone all shift. / 采样器整班挂在呼吸带。
    Exposure Ratio / 暴露比值
    实测浓度 ÷ 相应 OEL；≥ 1 超标，0.5 通常为行动水平。
    Measured concentration ÷ the matching OEL; ≥ 1 is overexposure, 0.5 the usual action level.
    易混 / Easily confused：与「浓度」不同：比值自带判断，浓度只是原始数。
    Not the raw concentration: the ratio carries the judgement.
    例句 / In a sentence：An exposure ratio of 0.8 triggered closer monitoring. / 暴露比值 0.8 触发了加密监测。
    Action Level / 行动水平
    通常为 OEL 的 50%；达到即启动定期采样、医学监测与培训等管理动作。
    Usually 50% of the OEL; reaching it starts periodic sampling, medical surveillance and training.
    易混 / Easily confused：与「超标线」不同：行动水平是「提前介入」的阈值，不是违规判定。
    Not the violation line: it triggers early intervention, not a violation finding.
    例句 / In a sentence：Lead at the action level started the surveillance program. / 铅达到行动水平，监测项目随之启动。
    Local Exhaust Ventilation (LEV) / 局部排风
    在污染源近旁捕获污染物的通风系统：罩口 → 管道 → 净化 → 排放。
    Ventilation capturing contaminants at the source: hood, duct, cleaner, discharge.
    易混 / Easily confused：与稀释通风不同：稀释把污染物摊满全屋，LEV 在进入呼吸带之前捕获。
    Not dilution ventilation: dilution spreads the contaminant through the room; LEV captures before the breathing zone.
    例句 / In a sentence：The LEV hood sat 15 cm from the weld. / LEV 罩口距焊缝 15 cm。
    STEL / 短时接触限值
    15 分钟内不得超过的浓度，防止急性效应；TWA 达标仍可能超 STEL。
    A 15-minute ceiling on concentration guarding against acute effects; a pass on TWA can still exceed the STEL.
    易混 / Easily confused：与 TWA 不同：TWA 管 8 小时慢性剂量，STEL 管短时峰值，ceiling 管任何瞬间。
    Not TWA: TWA covers the 8-hour dose, STEL short peaks, ceiling any instant.
    例句 / In a sentence：Cleaning tasks exceeded the STEL for 20 minutes. / 清洗作业 20 分钟内超了 STEL。
    Ceiling Limit / 上限值
    任何时刻都不得超过的浓度，主要用于刺激性与急毒性物质。
    A concentration never to be exceeded at any time, applied to irritant and acutely toxic substances.
    易混 / Easily confused：与 STEL 不同：ceiling 连 1 秒都不允许，STEL 允许 15 分钟内的均值。
    Not STEL: a ceiling allows no instant above it, while STEL averages over 15 minutes.
    例句 / In a sentence：Chlorine has a ceiling limit. / 氯气执行上限值。

    情景自测 | Scenario check

    本课理解Lesson comprehension

    这道题考什么：考三种限值的适用场景：读数类型决定对照对象。
    Tests matching the reading type to the right limit.

    某刺激性气体 5 秒峰值达到 15 ppm；其 TWA 限值 10 ppm、STEL 15 ppm、ceiling 5 ppm。超标判定是？

    An irritant gas peaks at 15 ppm for 5 seconds; its limits are TWA 10, STEL 15, ceiling 5 ppm. The violation finding is?

    自编练习题，不是 BCSP 官方真题，也不能用来预测分数。 / Original practice item, not an official BCSP exam question.

    动手练 | Practice

    1. 为 TWA / STEL / Ceiling 三种限值各写一句「管的是什么」。
    Write one line each for TWA, STEL and ceiling: what each one governs.

    学习打卡与笔记 | Progress & notes

    已完成 0/4 项 / 0/4 tasks complete

    连续学习 / Learning streak: 0 天 / 0 days

    进度保存在当前浏览器，不会自动跨设备同步。/ Progress is stored in this browser only.

    PNG 学习记录预览；可长按图片保存 / PNG card preview; long-press to save

    可靠来源 | Official references

    BCSP — CSP Examination Blueprint (CSP11)

    BCSP — Official Self-Assessments

    BCSP — Certified Safety Professional (CSP)

    Pearson VUE — CSP 考试预约 / Scheduling

    本课为一般性学习资料，不替代现场专业评估、法规要求或组织程序。/ Educational content only.

    ← 返回课程目录 / Back to catalog