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High pressure, supplied-air respirators used for abrasive blasting normally have an Assigned Protection Factor of 25. What does this NIOSH rating mean?

The wearer is protected from dust particles of 25 microns or smaller.
The operator can work in environments with contaminants present at 25 times OSHA's permissible exposure limit.
The wearer can be exposed to a hazardous environment for up to 25 minutes.
None of these.

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Previous Quizzes from the Past Week

Tuesday, November 22, 2011
What ASTM Committee deals with nuclear coatings?

Monday, November 21, 2011
What infestation has recently caused the fouling of intake structures at hydroelectric facilities in the Southwest?

Friday, November 18, 2011
What are you seeing on this steel surface magnified 100 times?

Wednesday, November 16, 2011
Manufacturers of supplied air respirators must acquire approval for these products from what agency?

Tuesday, November 15, 2011
True or false: Coating manufacturers no longer recommend coal tar epoxy coating systems.


More previous quizzes
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