Mesothelioma Navy Asbestos Regulations & Prevention 3

Question 1

Which historical Navy regulation first established permissible exposure limits for asbestos aboard vessels?

Accepted Answer

OPNAVINST 5100.23 (1987)

Answer

OPNAVINST 5100.23, the Navy's occupational safety program instruction, established comprehensive asbestos controls and exposure limits for Navy personnel.

Question 2

What personal protective measure was required for Navy workers performing 'Class I' asbestos work — the removal of thermal system insulation?

Accepted Answer

Full protective suit, gloves, and supplied-air respirator

Answer

Class I asbestos work is the highest-risk category and demands full body protection including a supplied-air respirator and disposable coveralls.

Question 3

What is the primary purpose of a 'negative-pressure enclosure' during asbestos abatement aboard a Navy vessel?

Accepted Answer

To contain asbestos fibers and prevent contamination of surrounding spaces

Answer

Negative-pressure enclosures use exhaust fans with HEPA filtration to keep airborne fibers inside the work zone and prevent spread to adjacent areas.

Question 4

Under OSHA 29 CFR 1915 (Shipyard Employment), what is the 'excursion limit' for asbestos exposure over a 30-minute period?

Accepted Answer

1.0 f/cc

Answer

OSHA's shipyard asbestos standard sets a short-term excursion limit of 1.0 fiber per cubic centimeter over any 30-minute sampling period.

Question 5

Which wetting method is required under OSHA and Navy standards to minimize airborne asbestos fibers during removal?

Accepted Answer

Amended water (water with a surfactant) applied to keep material wet

Answer

Amended water (water mixed with a wetting agent/surfactant) is required to keep asbestos material wet during removal, reducing fiber release.

Mesothelioma Navy Practice Test

Mesothelioma Navy Practice Test

Mesothelioma Navy Asbestos Regulations & Prevention 3