CIH Personal Protective Equipment (PPE)

Question 1

What is the Assigned Protection Factor (APF) for a half-face air-purifying respirator according to OSHA?

Accepted Answer

10

Answer

OSHA assigns an APF of 10 to half-face air-purifying respirators, meaning they can be used when workplace concentrations are up to 10 times the OEL.

Question 2

Which NIOSH filter series designation is oil-proof and provides protection against both oil-based and non-oil-based aerosols?

Accepted Answer

P-series

Answer

P-series filters (P95, P99, P100) are oil-proof and approved for use against all types of particulate aerosols including oil-based mists.

Question 3

Which testing method measures the time for a chemical to diffuse at the molecular level through an intact glove material?

Accepted Answer

Permeation testing

Answer

Permeation testing measures the breakthrough time for a chemical to diffuse at the molecular level through intact glove material, which is critical for chemical hazard protection.

Question 4

Per OSHA guidelines, by what factor should the labeled Noise Reduction Rating (NRR) of a single hearing protector be derated to estimate real-world performance?

Accepted Answer

50%

Answer

OSHA recommends derating the labeled NRR by 50% to account for variability in fit, use, and conditions compared to laboratory testing.

Question 5

Which type of fit test uses a saccharin or Bitrex aerosol challenge agent that the wearer detects by taste?

Accepted Answer

Qualitative fit test

Answer

Qualitative fit tests use challenge agents like saccharin or Bitrex that the wearer detects sensorially, indicating a compromised respirator seal.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Personal Protective Equipment (PPE)