CPE CPE Environmental Ergonomics Questions and Answers 2

Question 1

The predicted mean vote (PMV) index by Fanger predicts thermal comfort based on how many variables?

Accepted Answer

6

Answer

2

Answer

4

Answer

8

Question 2

What is the primary ergonomic concern with vibration frequencies in the range of 4–8 Hz for seated workers?

Accepted Answer

Resonance with the lumbar spine, increasing injury risk

Answer

Risk of hand-arm vibration syndrome

Answer

Disruption of visual acuity

Answer

Thermal discomfort from friction

Question 3

Carbon dioxide (CO2) concentration in an office space above what level is considered an indicator of inadequate ventilation?

Accepted Answer

1,000 ppm

Answer

400 ppm

Answer

800 ppm

Answer

2,000 ppm

Question 4

Illuminance is measured in which unit?

Accepted Answer

Lux (lx)

Answer

Candela (cd)

Answer

Lumen (lm)

Answer

Nit (nt)

Question 5

Heat acclimatization for workers newly exposed to hot environments typically requires how many days to achieve significant physiological adaptation?

Accepted Answer

7–14 days

Answer

1–3 days

Answer

21–30 days

Answer

60 days

Question 6

Which OSHA standard establishes the permissible exposure limit (PEL) for occupational noise?

Accepted Answer

29 CFR 1910.95

Answer

29 CFR 1910.134

Answer

29 CFR 1910.147

Answer

29 CFR 1910.1000