Technique for controlling direct glare

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Reference no: EM13770873

Industrial Ergonomics

Question 1. The visual sensory term __________ is the action of focusing on targets at various distances such as near-point and far-point.

visual field

accommodation

convergence

adaptation

Question 2. __________ is the measure of a stream of light falling on a surface.

Photometric energy

Illumination

Luminance

Contrast

Question 3. Contrast is the difference between the luminance of an object and the luminance of surrounding surfaces. When the luminance of an object (Lmax) is 4 candela per square meter (cd/m2) and the luminance of surrounding surfaces (Lmin) is 2 candela per square meter (cd/m2), what is the contrast?

20%

25%

50%

Question 4. Which of the following is not a technique for controlling direct glare?

Position luminaires as far from the operator's line of sight as is practical.

Use several low-intensity luminaires instead of one bright one.

Use surfaces that diffuse light such as non-gloss paper.

Use light shields and hoods.

Question 5. Table 3.16 in the textbook is the exposure guidelines for acclimated workers provided by NIOSH (1986). Using the table, find the Hourly Work/Rest Cycle for a standard worker in the following environment.Work load:

Heavy (>350W)

WBGT: 25.3 C

Continuous work

75% work/ 25% rest

50% work/ 50% rest

25% work/ 75% rest

Question 6. Using Table 3.13 in the textbook, find the exposure time for a worker in the following environment.

Relative humidity: 50%

Work load: Heavy, 230-350W (>240-300 Kcal/h)

Ambient temperature: 41 C (106 F)

5 minutes

15 minutes

30 minutes

45 minutes

Question 7. Which of the following is not a technique to mitigate the effects of vibration?

Source control

General control

Path control

Receiver control

Question 8. The __________ in the human eye is covered with two types of light-sensitive cells known as rods and cones.

cornea

retina

nerve sheath

optic nerve

Question 9. Which of the following is not contained in the inner ear of the human?

Cochlea

Vestibule

semicircular canals

Ossicles

Question 10. A (an) __________ is a portable sound measuring device for a worker who is fairly mobile and especially useful when the worker is changing locations frequently.

sound level meter

integrated sound level meter

WBGT equipment

noise dosimeter

Question 11. Discuss the methods of controlling thermal conditions. Include engineering controls, administrative controls, and work practices.

Question 12. Discuss the Case Study by Longmate and Hayes (1990) shown Topics should include ergonomic risk factors and ergonomic solutions. What have you learned from the Case Study?

Reference no: EM13770873

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