SafetyCâu 676 / 700
A worker with a full beard is assigned to wear a tight-fitting half-face respirator. What is the MAIN problem?
a.The beard makes the cartridges clog faster
b.Facial hair increases the assigned protection factor
c.Facial hair along the sealing surface prevents a reliable face-to-facepiece seal, so the respirator cannot be relied upon
d.A beard only matters for full-face respirators, not half-face
Giải thích
Correct: any facial hair that crosses the sealing surface of a tight-fitting respirator breaks the seal and lets contaminated air leak in, so the respirator cannot be relied upon and the worker cannot pass a fit test. Options addressing cartridge clogging or a higher protection factor are false. The seal problem applies to any tight-fitting respirator, half-face or full-face; a loose-fitting PAPR/hood is the usual alternative for bearded workers.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- On a jobsite, which item of required personal protective equipment must the EMPLOYER generally provide at no cost to the employee?
- Before an employee is fit-tested for a tight-fitting respirator, what must occur FIRST?
- A worker needs protection where the airborne contaminant is about 8 times the exposure limit. A half-mask air-purifying respirator has an assigned protection factor (APF) of 10. What does that APF tell you?
- For respirable crystalline silica in construction, the permissible exposure limit is about 50 micrograms per cubic meter as an 8-hour average. At approximately what airborne level does the 'action level' trigger additional requirements such as exposure monitoring?
- A contractor wants to control silica by following the standard's 'Table 1' approach rather than doing exposure sampling. When using a handheld masonry saw outdoors, which Table 1 control is specified?
- On a lead-in-construction job, the airborne action level is about 30 micrograms per cubic meter and the permissible exposure limit is about 50 micrograms per cubic meter (8-hour average). What is the PRIMARY significance of exposure reaching the action level?
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