CHST Emergency and Fire Preparedness 4

Question 1

During a construction site emergency evacuation, who is responsible for conducting a headcount at the designated assembly area?

Accepted Answer

The designated emergency warden or supervisor

Answer

Designated emergency wardens or supervisors are assigned the responsibility of accounting for all workers at the assembly point after an evacuation.

Question 2

A portable fire extinguisher rated '2-A:10-B:C' is appropriate for use on which types of fires?

Accepted Answer

Class A, Class B, and Class C fires

Answer

The 'A:B:C' rating indicates the extinguisher is suitable for ordinary combustibles (A), flammable liquids (B), and electrical fires (C).

Question 3

Under OSHA 29 CFR 1926.150, when must a fire extinguisher be present at a construction site?

Accepted Answer

At all times during construction operations as a minimum standard

Answer

OSHA requires fire extinguishers to be available at all construction sites at a minimum, with additional requirements for specific hazards.

Question 4

What is the primary purpose of a fire watch during hot work operations?

Accepted Answer

To monitor for ignition of fires during and after hot work

Answer

A fire watch is maintained during and for at least 30 minutes after hot work to detect and extinguish any fires that may ignite from sparks or heat.

Question 5

Which factor most directly determines the required travel distance to a fire extinguisher on a construction site for Class B hazards?

Accepted Answer

The size and rating of the extinguisher relative to the hazard

Answer

OSHA requires extinguishers for Class B hazards to be placed so travel distance does not exceed 50 feet, with rating matched to hazard size.

CHST - Construction Health and Safety Technician Practice Test