USCG Fire Prevention and Fire Fighting 2

Question 1

What does the acronym PASS stand for when using a portable fire extinguisher?

Accepted Answer

Pull, Aim, Squeeze, Sweep

Answer

PASS stands for Pull the pin, Aim at the base of the fire, Squeeze the handle, and Sweep side to side at the base of the flames.

Question 2

CO2 fire extinguishers are most effective in which environment?

Accepted Answer

Enclosed spaces where the CO2 concentration can build up

Answer

CO2 extinguishers work by displacing oxygen and are most effective in enclosed spaces where the gas concentration can reach levels sufficient to suppress the fire.

Question 3

What is meant by 'boundary cooling' during a shipboard fire?

Accepted Answer

Applying water to bulkheads and decks surrounding the fire to prevent spread

Answer

Boundary cooling involves applying water to the metal structures surrounding a fire to prevent heat transfer that could ignite adjacent compartments or spaces.

Question 4

Which firefighting agent is most effective for a Class A (ordinary combustibles) fire?

Accepted Answer

Water

Answer

Water is the most effective agent for Class A fires involving ordinary combustibles such as wood, paper, and cloth because it cools the burning material below its ignition temperature.

Question 5

What is an 'Aqueous Film-Forming Foam' (AFFF) used for aboard vessels?

Accepted Answer

Suppressing flammable liquid (Class B) fires, especially oil fires

Answer

AFFF creates a film over flammable liquid surfaces that seals off fuel vapors and cools the surface, making it highly effective for Class B oil and fuel fires common on vessels.

USCG - United States Coast Guard Practice Test

USCG - United States Coast Guard Practice Test

USCG Fire Prevention and Fire Fighting 2