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Consider the following statements regarding N95 respirators;
1. It has better filtration efficiency than surgical masks and N99 respirators.
2. It can block 95 percent 0.3 micron particles.
3. It falls in the category of Personal Protective Equipment.
Which of the above statements is/are correct?
  • a)
    1 and 2 only
  • b)
    2 and 3 only
  • c)
    1 and 3 only
  • d)
    All of the above
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the following statements regarding N95 respirators;1. It has ...
N95 respirators made by different companies were found to have different filtration efficiencies for the most penetrating particle size (0.1 to 0.3 micron), but all were at least 95% efficient at that size for NaCl particles. Above the most penetrating particle size the filtration efficiency increases with size; it reaches approximately 99.5% or higher at about 0.75 micron. Tests with bacteria of size and shape similar to Mycobacterium tuberculosis also showed filtration efficiencies of 99.5% or higher. 
N95 respirators and surgical masks (face masks) are examples of personal protective equipment that are used to protect the wearer from airborne particles and from liquid contaminating the face.
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Consider the following statements regarding N95 respirators;1. It has better filtration efficiency than surgical masks and N99 respirators.2. It can block 95 percent 0.3 micron particles.3. It falls in the category of Personal Protective Equipment.Which of the above statements is/are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)All of the aboveCorrect answer is option 'B'. Can you explain this answer?
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