Firefighting Midterm Studyguide

D.C. Locker

All fire suppression equipment and gear is kept here.

Bull's eye

3-75-4-M (3 decks below main deck, 75th frame, far port, Ammunition)

Positive ventilation

Air going in

Negative ventilation

Air going out

Fire under control

Extinguishing agent being applied to the seat of the fire and fire is no longer expanding.

Straight stream of water is good for overhauling class "A" Materials

(just know ts)

Fire point

temperature at which a liquid gives off flammable vapors rapidly enough to support combustion and external ignition.

Inherent vice

fire hazard by itself

Pyrolysis

conversion of solid fuel into a flammable vapor when heated.

True vapor pressure

vapor pressure given off by a liquid at any temp when it reaches equilibrium in a closed environment.

A Flashpoint (USCG)

80 degrees F and above. RVP 14 PSI and above. FLAMMABLE.

B Flashpoint (USCG)

80 degrees F and above. RVP between 8.5 PSI and 14 PSI. FLAMMABLE.

C Flashpoint (USCG)

80 degrees F and above. RVP 8.5 PSI and less. FLAMMABLE.

D Flashpoint (USCG)

between 80 degrees F and 150 degrees F. Combustible.

E Flashpoint (USCG)

150 degrees F and above. Combustible.

Lower explosive limit

The least concentration of flammable vapors in the air that will burn (lean limit)

Upper explosive limit

the greatest concentration of flammable vapors in the air that will burn (rich limit)

Backdraft

occurs in small oxygen starved rooms, ts blows tf up yo.

Fire, collision, and emergency

continuous ringing of the ship's whistle and general alarm for no less than 10 seconds.

Abandon Ship

More than 6 short blasts followed by 1 long blast of the ship's whistle and general alarm.

Man overboard

3 long blasts of the ship's whistle and general alarm.

Dismissal

3 short blasts of the ship's whistle and general alarm.

Lower life boats

1 short blast of the ship's whistle.

Stop lowering lifeboats

2 short blasts of the ship's whistle

Recall and recover lifeboats

1 short, 1 long, 1 short blast of ship's whistle.

Fire triangle

Oxygen, fuel, heat.

Fire tetrahedron

Oxygen, fuel, heat, chain reaction.

% Oxygen in air we need to breathe

21% brah.

3 methods fire spreads

Convection (remote area), conduction (touching), radiation (heat waves)

Class A fire

Ordinary common combustibles like paper, wood, plastic, coal, rags, liners. Water to extinguish.

Class B fire

flammable/combustible liquids such as gas, paint, and crude oil. Foam or dry chemical extinguisher to extinguish

Class C fire

LIVE electrical. CO2 to extinguish. Don't forget to ground extinguisher when in use or bad things will happen.

Class D fire

flammable metals such as Mg, Li, or anything that ends in "-ium." Try to fight ts with Dry Powder but you're KP no bueno if this ever happens

Class K fire

Galley and deep fat fryer. Wet Chemical to extinguish.

Class L fire

Lithium. Thermal runaway. You're done sir done if this happens. Try to fight with Dry Powder.

First thing to do when you discover a fire

SOUND THE ALARM!!!!!!!!!!!!!!!!!!!!

FCP

Fire control Plan

Fire doubling time

30 seconds.

Most common cause of fire aboard a ship

Laundry.

Most common spontaneous combustions happen because of

Oily rags

What is fire

The rapid oxidation of a fuel emitting visible light and heat.

Where should station bill be posted

Bridge, engine room, galley, common areas.