CHST CHST - Construction Health and Safety Technician Emergency and Fire Preparedness Questions and Answers 5

Question 1

What is the recommended minimum clear width of an egress path on an active construction site to accommodate emergency evacuation?

Accepted Answer

36 inches

Answer

A minimum 28-inch clear width is specified in many codes, but OSHA and NFPA guidance for construction sites typically recommend at least 36 inches for safe egress.

Question 2

Which chemical agent is prohibited for use in fighting fires involving reactive metals such as magnesium or titanium found on some construction sites?

Accepted Answer

Water

Answer

Water reacts violently with burning reactive metals, potentially causing explosions or spreading the fire; only Class D agents are appropriate.

Question 3

When multiple contractors share a construction site, who bears the primary responsibility for coordinating the site-wide Emergency Action Plan?

Accepted Answer

The general contractor or controlling employer

Answer

The general contractor, as the controlling employer, is responsible for coordinating a unified EAP across all subcontractors on a multi-employer site.

Question 4

A propane torch used for roofing ignites a structural member. This fire is BEST classified as which type?

Accepted Answer

Class A and Class B combined

Answer

If both the structural wood (Class A) and propane fuel (Class B) are burning, the fire involves two classes simultaneously.

Question 5

What is the purpose of a 'Knox Box' installed at the entrance to a major construction project?

Accepted Answer

To provide fire departments keyed access without forced entry

Answer

A Knox Box is a secure key storage system that allows fire departments to access buildings or sites quickly without damaging doors or gates.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST CHST - Construction Health and Safety Technician Emergency and Fire Preparedness Questions and Answers 5