CIH Occupational Health Hazards 2

Question 1

Which type of non-ionizing radiation is most associated with occupational skin and eye damage from welding operations?

Accepted Answer

Ultraviolet radiation

Answer

Ultraviolet radiation from welding arcs causes photokeratitis (arc eye) and skin burns, making it the primary non-ionizing radiation hazard in welding.

Question 2

A worker is exposed to a combination of benzene (TLV-TWA 0.5 ppm, measured at 0.3 ppm) and toluene (TLV-TWA 50 ppm, measured at 30 ppm). What is the mixture hazard index?

Accepted Answer

1.2

Answer

The mixture hazard index = (0.3/0.5) + (30/50) = 0.6 + 0.6 = 1.2, which exceeds 1.0, indicating an overexposure condition.

Question 3

Silicosis is most directly caused by inhalation of which form of silica?

Accepted Answer

Crystalline silica (quartz or cristobalite)

Answer

Crystalline silica, particularly quartz and cristobalite, causes silicosis by triggering fibrotic lung disease upon inhalation.

Question 4

Which OSHA standard specifically establishes permissible exposure limits (PELs) for air contaminants in general industry?

Accepted Answer

29 CFR 1910.1000

Answer

29 CFR 1910.1000 (Table Z-1, Z-2, Z-3) establishes air contaminant PELs for general industry workplaces.

Question 5

Which occupational disease is specifically linked to long-term exposure to vinyl chloride monomer?

Accepted Answer

Hepatic angiosarcoma

Answer

Vinyl chloride exposure is associated with hepatic angiosarcoma, a rare liver cancer, as well as acro-osteolysis and Raynaud's phenomenon.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Occupational Health Hazards 2