CHST Health Hazards and PPE 2

Question 1

Under OSHA 1926.55, which standard provides legally enforceable maximum exposure levels for airborne contaminants on construction sites?

Accepted Answer

Permissible Exposure Limits (PELs) as listed in OSHA Tables Z-1, Z-2, and Z-3

Answer

Threshold Limit Values (TLVs) published by ACGIH

Answer

NIOSH Recommended Exposure Limits (RELs) only

Answer

OSHA only regulates respiratory hazards, not chemical exposures on construction sites

Question 2

Under OSHA 1926.1153 for respirable crystalline silica, what is the Permissible Exposure Limit (PEL) as an 8-hour TWA?

Accepted Answer

50 micrograms per cubic meter (μg/m³)

Answer

100 μg/m³

Answer

25 μg/m³

Answer

250 μg/m³

Question 3

What is an 'Assigned Protection Factor' (APF) for respiratory protection under OSHA 1910.134?

Accepted Answer

The level of respiratory protection a respirator type is expected to provide to properly fitted, trained users

Answer

The minimum oxygen concentration the respirator can maintain inside the facepiece

Answer

The maximum contaminant concentration the filter can hold before saturation

Answer

The number of hours a respirator cartridge remains effective

Question 4

Which class of hard hat under ANSI Z89.1 provides the highest electrical protection, and at what voltage is it proof tested?

Accepted Answer

Class E (Electrical) — proof tested to 20,000 volts

Answer

Class G (General) — proof tested to 2,200 volts

Answer

Class C (Conductive) — not rated for electrical protection

Answer

Class EH (Extra High) — proof tested to 50,000 volts

Question 5

Under OSHA 1926.102, eye and face protection must meet which ANSI standard for impact resistance?

Accepted Answer

ANSI Z87.1

Answer

ANSI Z89.1

Answer

ANSI Z41.1

Answer

ANSI Z87.3

Question 6

Under OSHA 1926.52, at what noise exposure level (as an 8-hour TWA) does a hearing conservation program become mandatory?

Accepted Answer

85 dBA (the Action Level)

Answer

90 dBA (the PEL)

Answer

95 dBA

Answer

80 dBA