[考古] 職衛小考
1.配合
TLV-STEL:The concentration to which workers can be exposed
continuously for a short period of time(15min)
without suffering from irritation,chronic or
irreversible tissue damage,narcosis of sufficient
degree to increase the likelihood of accidental injury,
impair self-rescue,or reduce work efficiency.
TLV-TWA:The time weighted average concentration for a conventional
8-hr workday and 40-hr workweek.
TLV-Ceiling:The airborne concentration that should not be
exceeded during any part of the working exposure.
2.(3)These are basic components of gas and vapor active sampling:
(A)Collector (B)Air flow (C)Pump (D)Flow meter
Which of the following are the corret active sampling train?
(3)B-->A-->D-->C
3.(123)For gas and vapor sampling,the collect method could be:
(1)Air-storage
(2)Adsorption on Granular Solid
(3)Liquid Absorption & Chemical Reaction (複選)
4.(2)Which is incorrect with respective to the aerosol size in general?
(1)Gas molecules around 0.0003um
(2)Metal fume around 10~100un
(3)Smokes around 0.2um
(4)Dust around 0.5~50um
5.(3)Which of the following statement is incorrect?
(1)Directing reading method combine sampling and analysis to provide
continuous or rapid intermittent measurement of gas/vapor conentrations
(2)Methods vary with respect to sensitivity and selectivity,response
time,size,and range of applications
(3)Most existing direct reading instruments are ideal and preform
very well.
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