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

OSHA 1926.55 requires that construction workers not be exposed to airborne contaminants in excess of the Permissible Exposure Limits listed in Tables Z-1, Z-2, and Z-3 of 29 CFR 1926.

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

OSHA's Respirable Crystalline Silica standard for construction (1926.1153) sets a PEL of 50 μg/m³ as an 8-hour TWA, with an action level of 25 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

APF is the expected workplace level of protection provided to a properly fit-tested and trained user — an APF of 10 means the respirator reduces the outside concentration by a factor of 10 inside the facepiece.

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

Under ANSI Z89.1, Class E (Electrical) hard hats are proof tested to 20,000 volts (phase to ground) and are the highest standard for electrical protection. Class G provides limited electrical protection at 2,200 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

OSHA 1926.102(a)(1) requires that eye and face protection devices meet ANSI Z87.1, which establishes performance requirements for impact, optical quality, and other properties of safety eyewear.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST Health Hazards and PPE 2