来自 昏昏睡睡HSE · From Drowsy HSE CSP DAILY LEARNING · DAY 297

综合复习：D1 计算专项 · 概念解析 | Review: D1 Calculations · Core Concepts

第 59 块 · 综合复习 · Integrated Review第 1 / 5 课 · 概念解析Lesson 1 of 5 · Core Concepts

本课只做一件事：搞清「综合复习：D1 计算专项」到底是什么、为什么考试要先过这一关、它管到哪里为止。

Get clear on what Review: D1 Calculations really is, why it comes first, and where it stops.

本课不涉及：不展开细节与题目——那是第 2–5 课的事。
Not covered here: No detail, no questions — those are lessons 2 to 5.

本课目标 | Learning objectives

  1. 能用一句话说清「综合复习：D1 计算专项」解决的是什么问题
  2. 能举出一个「不懂它就一定做错」的例子
  3. 知道本课的边界，不把后续课的内容提前混进来

  • State in one sentence the problem Review: D1 Calculations solves
  • Give one example where missing it guarantees a wrong answer
  • Know this lesson's boundary and keep later lessons out

    • 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.

    它是什么 | What it is

    D1 的计算题集中在四件套上。坠落净空：自由坠落距离 + 缓冲距离 + D 环到鞋底高度 + 安全余量（≥1 m）——自由坠落=系绳长−锚点高出 D 环的距离，这一项最常被忽略。安全距离 Ds（双手进入光幕/压床）：Ds（英寸）= 63 × T总（秒），最小 7 英寸（公制 ≈1600 mm/s×T）。噪声换算：OSHA 5 dB 交换率（90 dBA 允许 8 小时，95→4h，100→2h），NIOSH 3 dB（85 dBA 起）；记住「+3 dB 能量翻倍」。TRIR/DART：记录例数×200,000÷总工时，200,000 是 100 名全职员工年工时的口径。四类单位陷阱要形成条件反射：lb↔kg（1 kg=2.2 lb）、inch↔cm（1 in=2.54 cm）、dBA 是对数（不是线性倍数）、比率分母是 200,000 工时不是月工时。答题模板六步：已知→求→公式→代入→单位校验→结论对照选项；每题 3 分钟封顶，到点标记跳过；错题记入口算卡（题目特征→公式→答案量级）每天过一遍。

    D1 math lives on four formulas. Fall clearance: free fall plus deceleration plus D-ring-to-shoe height plus a margin of at least one meter — free fall is lanyard length minus how far the anchor sits above the D-ring, the term most often dropped. Safety distance Ds: 63 inches per second times total stop time, minimum seven inches. Noise: the OSHA 5-dB exchange from a 90 dBA eight-hour PEL, NIOSH 3 dB from 85, and plus three means double the energy. TRIR and DART: cases times 200,000 over hours, where 200,000 is the annual hours of a hundred full-timers. Four unit reflexes: 2.2 pounds per kilogram, 2.54 centimeters per inch, decibels are logarithmic, and the rate denominator is 200,000 hours. The template runs given, find, formula, substitute, unit check, conclude — three minutes a cap, flag and skip, and misses go to a drill card of pattern, formula and answer magnitude.

    为什么先学它 / Why first
    三个坑：①先代数后写公式——单位错要到结论才发现，顺序对了当场暴露；②dBA 当线性——把「响一倍」当 +6 dB 是经典错项设计；③坠落净空漏 D 环高度或漏余量——两个漏项都是题库最爱设的选项。
    Three traps: substituting before writing the formula, so a unit error surfaces only at the answer; treating dBA linearly — 'twice as loud is plus six' is a classic distractor; and dropping the D-ring height or the margin in clearance, both favorite wrong options.
    它管到哪里为止 / Where it stops
    本块覆盖 D1 高频计算；通风、暴露统计（95%UCL）与人体工效提举（RWL）在 D6/D3 相关块与综合复习 D3+D6 块处理。
    High-frequency D1 math only; ventilation, exposure statistics and lifting equations live with D6 and the D3+D6 review.

    先认个脸 | Terms you will meet

    1. Fall Distance — 坠落距离
    2. Safety Distance — 安全距离 Ds— Safety distance Ds
    3. Noise Conversion — 噪声换算
    4. TRIR — 总记录工伤率
    5. Unit Trap — 单位陷阱
    6. Drill Card — 口算卡

    这里只要求认得；定义、易混与例句在本块第 3 课「术语精讲」。/ Recognition only — definitions come in the glossary lesson of this block.

    情景自测 | Scenario check

    本课理解Lesson comprehension

    这道题考什么：考答题模板的第一步。
    Tests the first template step.

    计算题最可靠的起手动作是？

    The most reliable opening move on a calculation item 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. 做一页单位换算速查卡（lb/kg·inch/cm·dBA·200,000）。
    Build a one-page unit cheat card.

    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