2011年注册环保工程师专业考试专业案例噪声上午

201176.5~20m31000m425m2mA3m1200mB1m1200mC3m1200mD3m2000m77500Hz0.021000HzA0.0063dBB22dBC16dBD19dB7845dB32dB2A25.7dBB29.4dBC38.5dBD32dB150150012007500450079ABCD80a=212mmb=212mmd=200mm,12mm8.8Kg/m2C=344A2052HzB4.4HzC102.6HzD44.5HzTaobao:ywlhp02103081630r/min42.5t80%A1210KN/mB2723KN/mC1823KN/mD4560N/cm82100mm85mm2.5MPa1.5640KN/mA1cmB4cmC6cmD5cm83A120mmB80mmC100mmD300mm8492.8dB200m236dB0.916m215dB0.0960dBAB25dBC45dBD35dB855004532289220.535001550035008632dB40dB172dB35dB25%Taobao:ywlhp021030A49.5dBB54.5dBC42.0dBD57.9dB871200Kg61.5MPa3cm2.5125HzA0.016m2B0.010m2C0.044m2D0.100m2881000HZ95dB64dB30m236dB2m21.32010m2891m72dB20m235dB35dBA29.7dBB27.3dBC26.1dBD23.5?dB90400Hz400HzA25mm24Kg/m2B25mm24Kg/m2200mmC25mm24Kg/m2400mmD25mmm24Kg/m2100mm913.5m40m40m3.0mAA2dBB4dBC6dBD8dB9222dB9.5m2101.3dB20mA76.6dBB49.7dBC47.5dBD79.0dBTaobao:ywlhp02103093XX100m220m250m220m2A3.2dBB6.0dBC2.0dBD4.7dB3001550094500HzLn15dB30%1000HzLnA23dBB25dBC18dBD21dB95Taobao:ywlhp021030125~4000HzHz125250500100020004000dB757372756963dB524539353239A45dBB40dBC37dBD32dB96720r/min60N85%A16.21KN/mB4.50KN/mC1.62KN/mD7.80KN/m97750r/min1200Kg2600Kg65800N/cm4A2%B2%C6%D6%983600r/min25HzA45%B15%C89%D11%991440r/min80%A24.0%B16.0%C9.6%D12.4%100ABTaobao:ywlhp021030CDTaobao:ywlhp021030