CDS Safety Standards & Hazardous Material Handling 3

Question 1

Which NFPA standard specifically addresses the control of flammable and combustible liquids during demolition operations?

Accepted Answer

NFPA 30

Answer

NFPA 30 (Flammable and Combustible Liquids Code) governs the handling and storage of these liquids, including during demolition.

Question 2

A demolition crew finds vermiculite insulation in a building's attic. What is the primary safety concern and required action?

Accepted Answer

Presume it contains asbestos and follow asbestos abatement protocols

Answer

Vermiculite from Libby, Montana is associated with asbestos contamination; it must be presumed to contain asbestos and handled accordingly.

Question 3

Under the EPA's RRP Rule, what is the required clearance testing threshold for lead dust on floors after demolition disturbs lead-based paint?

Accepted Answer

40 μg/ft²

Answer

EPA's RRP Rule requires post-work floor clearance of 40 μg/ft² or less for lead dust to confirm adequate cleanup.

Question 4

What type of fire extinguisher is appropriate for a Class D fire involving combustible metal swarf from demolition cutting operations?

Accepted Answer

Dry powder extinguisher rated for Class D metals

Answer

Class D fires involving combustible metals (e.g., magnesium, titanium) require a dry powder extinguisher specifically rated for Class D fires.

Question 5

What is the OSHA-required minimum frequency for air monitoring of silica dust when a demolition supervisor establishes that a task is on the Table 1 control list?

Accepted Answer

No air monitoring is required if Table 1 controls are fully implemented

Answer

OSHA's silica standard allows employers who fully implement Table 1 engineering controls to skip air monitoring for those tasks.

(CDS) Certified Demolition Supervisor Practice Test

(CDS) Certified Demolition Supervisor Practice Test

CDS Safety Standards & Hazardous Material Handling 3