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提问人：网友kevintop
发布时间：2022-01-07
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Mine dust can not accelerate mechanical wear,short the service life of precision instiuments.
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更多“Mine dust can not accelerate mechanical wear,short the service life of precision instiuments.”相关的问题
第1题
Quartz is a common component of rocks; consequently, mine workers are potentially exposed to quartz dust when rock is cut, drilled, crushed, and transported.
第2题
The rule also sets forth the mine operator’s obligations, including respirable dust sampling requirements for Part （) miners.
A.10
B.30
C.60
D.90
第3题
Many practical areas of engineering controls designed to mitigate exposure of surface mine workers to all airborne dusts, including silica, are：
A、drill dust collection systems
B、enclosed cab filtration systems
C、controlling dust on unpaved haulage roads
D、controlling dust at the primary hopper dump
第4题
In an underground limestone mine, samplers were placed in the immediate intake and return
of an underground crusher to determine the amount of dust liberated during the dumping/crushing of the limestone.
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第5题
A doctor may diagnose CWP or silicosis based on the combination of an appropriate history
of exposure to coal mine dust or silica, compatible changes in chest imaging or lung pathology, and absence of plausible alternative diagnoses.
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第8题
Wet dust control systems can be very effective but are more costly to install and operate.
第9题
Adding excessive water down the hole can cause operational problems with appreciable improvement in dust control.
