課程名稱︰作業環境測定二 課程性質︰選修 課程教師︰黃耀輝 開課學院：公衛學院 開課系所︰職衛所 考試日期（年月日）︰2013.04.17 考試時限（分鐘）：120 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1. What does equal loudness contour(等響度曲線=psychoacoustic curve) mean? What is its role in the noise level measurement? What is the definition for sound level in dB? What is the permissible exposure limit for noise? 2. The equivalent continuous A-weighted sound pressure levels(LAeq) were measured for four time periods of 4 hours at a point alongside a road. These results were 80 dB(40 min), 90 dB(20 min), 70 dB(20 min), 80 dB(40 min ), respectively. What would be the equivalent continuous A weighted sound pressure level for the full 4 hour(LAeq, 4h)? [Please write down the equation(s) used in your calculation(s).] 3. What are the definition for sound level in noise dose(噪音劑量)? Please calculate the dose(%) of the measured noise level based on the exposure conditions and threshold settings. [Please write down the equations used in your calculation(s).] ---------------------------------------------------------------------------- Dosimeter with threshold | Dosimeter with threshold exposure set at 90 dBA | set at 80 dBA condition | ---------------------------------------------------------------------------- 90 dBA for 4 hrs | + ? | ? 80 dBA for 4 hrs | | ----------------------------------------------------------------------------- 90 dBA for 7 hrs | + ? | ? 89 dBA for 1 hrs | ----------------------------------------------------------------------------- 4. What does octave band and 1/3 octave band mean? Please briefly describe them in terms of frequency and the relationship between them? Why the measured values(dB) for a specified noise or sound with 1/3 octave band analyzer are generally less than those by 1/1 octave band analyzer? 5. Direction is important in the vibration exposure measurement. How to define it for a subject exposed to vibration? For an integrated value for vibration measurement, how to incorporate the vibration measurements from different directions? And, Please briefly describe the unit(s) may be used in the presentation for vibration magnitude. 6. Please briefly describe WBGT. What factors do it concern in this instrument design, and how they are concerned in this instrument design? What is Wind-Chill index(風寒指數)? What is heat acclimatization(熱適應)? What precautions should be taken in the practice of the temperature measurement? 7. (1) What are the most concerned aspects for risk factors of work-related musculoskeletal disorders(WMSDs)? (2) Please name two MSDs and briefly explain the possible causes for them, respectively. 8. (1) In the 1991 NIOSH Lifting Equation, what parameters are applied in the equation, and please briefing the meaning of them. (2) Please briefly describe (i) ACGIH TLV for Hand Activity Job (ii) Musculoskeletal Disorders checklist(MSDs) (iii) Strain Index(SI). --

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