CPE CPE Environmental Ergonomics Questions and Answers

Question 1

OSHA's permissible exposure limit (PEL) for occupational noise is 90 dBA as an 8-hour TWA with what exchange rate?

Accepted Answer

5 dB doubling rate

Answer

3 dB doubling rate

Answer

6 dB doubling rate

Answer

10 dB doubling rate

Question 2

Wet Bulb Globe Temperature (WBGT) is used to assess heat stress and accounts for which environmental factors?

Accepted Answer

Air temperature, humidity, radiant heat, and air movement

Answer

Air temperature only

Answer

Wind chill and barometric pressure

Answer

Humidity and altitude

Question 3

Which type of lighting is most recommended for detailed visual inspection tasks in industrial settings?

Accepted Answer

High-intensity task lighting supplemented by appropriate ambient lighting

Answer

Ambient (general) lighting only

Answer

Colored fluorescent lighting

Answer

Strobe lighting for motion detection

Question 4

What is the recommended ASHRAE thermal comfort temperature range for sedentary office work in summer?

Accepted Answer

73–79°F (23–26°C)

Answer

60–65°F (15–18°C)

Answer

68–70°F (20–21°C)

Answer

80–85°F (27–29°C)

Question 5

Noise-Induced Hearing Loss (NIHL) first affects which frequency range?

Accepted Answer

4,000 Hz (4 kHz notch)

Answer

250–500 Hz

Answer

1,000–2,000 Hz

Answer

8,000–10,000 Hz

Question 6

Glare in visual ergonomics is classified as either disability glare or discomfort glare. Which type directly reduces visual acuity?

Accepted Answer

Disability glare

Answer

Discomfort glare

Answer

Reflected glare

Answer

Specular glare