1. Oxygen, accelerant and heat
   Oxygen, fuel and heat
2. Wood, a spark and fuel
   Fuel, oxygen, alcohol

If you don't have oxygen, a fuel source and some kind of heat then you aren't going to have much of a fire. If all of these parts of the triangle are present, then a fire is not only possible but likely.

1. Nothing
   Start an investigation you can hand off to the investigator when they arrive.
2. If possible, photograph and salvage evidence.
   Let it burn.

If the investigator has yet to arrive and you see evidence of what started the fire, you can do your best to salvage it from the burn as well as tag what you've seen and photograph it so the investigator can refer to it later.

1. 3
   4
2. 5
   10

There are 5 classes of fires, and it's helpful to know what kind of fire you're dealing with if you want to fight it, as different fuel sources can greatly change how you extinguish a fire.

1. Class A fires are started when heat causes a flammable liquid like gasoline to ignite.
   Class A fires have pretty normal fuel like wood, trash, plastic or other common items.
2. Class A fires are small, self-contained fires that are still easy to regulate.
   Class A fires burn at the lowest temperature of all fires.

A Class A fire has "normal" everyday items as its fuel source. Paper, wood and plastic are common, which is why this type of fire is also one of the most common accidental types of fires.

1. Class B fires have a liquid or gas as a fuel, such as gasoline or butane.
   Class B fires will burn hotter and longer than a Class A fire.
2. Class B fires usually produce very little smoke compared to class A.
   Class B fires almost always occur outdoors.

Class B fires have liquid or gas fuel sources. Because a flammable liquid is a source for this kind of fire these are usually, but not always, the kinds of fires you'd be more likely to find in an industrial setting.

1. Class C fires are forest fires.
   Class C fires are caused by burning rubber.
2. Class C fires are electrical fires.
   Class C fires produce very little heat, relatively speaking.

A class C fire is a fire that had some kind of electrical components, such as faulty wiring or an overheated engine. To fight these kinds of fires, you need to make sure you cut the power source.

1. Industrial chemicals
   Radioactive materials
2. Metals
   Living tissue

Class D fires have combustible metals as their fuel source. Obviously, not many metals are going to burn very often, but some will at the right temperature, like magnesium or aluminum. These fires should not be fought with water, which can make the situation much worse.

1. Cooking liquids
   Candles
2. Cigarettes
   Intentionally lit fuels

Even though a Class B fire uses a liquid as a fuel source, Class K fires got their own classification for being unique enough to merit special attention. These fires are the products of burning cooking liquids like vegetable oil.

1. At or over 100 F.
   At or over 250 F.
2. Under 100 F.
   A liquid that ignites at any temperature is combustible.

A combustible liquid has a flash point at or over 100 F. Anything that ignites lower than that temperature is considered a flammable liquid as opposed to a combustible one.

1. 48 hours.
   24 hours.
2. For the entire length of the investigation.
   Until all firefighters have left the scene.

Though the fire department may continue investigating a fire long after it ends, the scene itself is under the authority of the department only until all firefighters have left the area.

1. Gravity
   Mass
2. Friction
   Tension

Due to the friction of the water in a length of hose, you need more power pushing that water out of a longer hose than a shorter one. That's very relevant when you're fighting a fire, as the force from a longer hose will be diminished.

1. 1,000 to 2,000
   5,000 to 7,000
2. 7,500 to 9,500
   12,500 to 15,000

This one is a bit tricky, since different woods will obviously have measurements for heat energy but most firewood you're likely to use in your day-to-day life probably ranks between 5,000 and 7,000 BTUs per pound.

1. Self-Contained Breathing Apparatus
   Super Conductive Base Arch
2. Small Cost Big Award
   Shield Containing Blast Assault

The self-contained breathing apparatus is the breathing system that allows a firefighter to handle breathing in conditions with low oxygen or toxic fumes in the air.

1. Depends on the ambient temperature in the room
   100 feet per second
2. The speed of light
   The speed of sound

These kinds of rays travel at the speed of light because they're thermal radiation and essentially are light. Other kinds of heat like convection and conduction are much slower.

1. Cutter
   Jaws of Life
2. Hydraulic Press
   Hydraulic Shears

Possibly the most famous tool in emergency car wreck response, the Jaws of Life operate very much like a giant, metal bird beak cutting into or prying apart smashed metal to allow access to a damaged vehicle.

1. Hurst Tool
   Hydraulic Extractor
2. Gibson's Clamp
   Road Shear

The Hurst Tool was named for its inventor George Hurst in 1961, replacing normal saws that had been used previously in serious car accidents.

1. A tool for digging trenches around forest fires
   A tool for harvesting evidence after a fire
2. A firefighting aircraft
   An investigator who has to dig through ashes

The "super scooper" refers to a Canadian CL-415 Bombardier Aircraft which can carry over 3,000 gallons of liquid to be dumped over a fire.

1. Backdraft
   Flash Point
2. Combustion
   Flashover

When the oxygen level in a room gets low as a result of being consumed in the fire, opening a window or a door and providing a sudden influx of new oxygen can create a massive explosion known as a backdraft.

1. Flashovers occur at lower temperatures.
   Flashovers only happen outside.
2. Flashovers are temperature-driven while backdraft is air-driven.
   Flashovers cause less damage.

A flashover and a backdraft may look a lot alike, but a flashover occurs when the thermal radiation in a room radiates back on all the contents of the room, causing everything to ignite, as opposed to backdraft which requires oxygen to be added.

1. Flame and Smoulder Tools
   Fire Aid Strike Team
2. First Assault Stealth Team
   Firefighter Assist and Search Team

The Firefighter Assist and Search Team are a group of firefighters whose job it is to assist other firefighters in need should they become trapped or require assistance on the scene during a fire. They rescue the rescuers.

1. New recruits
   Fire chief
2. Lieutenant
   Captain

Things can get hectic during a fire, so different ranking firefighters have different helmets to help people identify them more easily. The chief officers, the highest-ranking of all, will be wearing white.

1. Only the driver
   Yes
2. No seatbelts are available on a fire engine.
   Not during emergency calls

Even though firefighters may be able to drive faster to get to an emergency, they still need to follow basic safety precautions like wearing seat belts.

1. It's pressurized and ready for use.
   It's not ready for use yet.
2. It's taken extensive heat damage.
   It's been safely stored away.

A charged hose is one that has been pressurized and is primed and ready to be used for firefighting. A hose that has not been pressurized will not be much good at the spur of the moment when it's needed.

1. Yearly
   Every 2 years
2. As needed
   Twice a year

Though it's true some may recommend only once a year, most often it's recommended to be done twice a year, typically when the clocks get changed for daylight saving time to make it easier to remember.

1. About 50 pounds.
   About 75 pounds
2. Over 100 pounds
   It depends on the firefighter.

Typical firefighting gear will weigh in around 65-75 pounds. When this gets soaked with water it can weigh a lot more, which is part of the reason it's so important for firefighters to be in peak physical condition.

1. A truck that performs as both an engine and a ladder truck
   A truck that carries 5 firefighters
2. A 5-hose truc
   A truck that has 5 water tanks

A quint truck, or quintuple combination pumper, can serve as both an engine and a ladder truck. The "quint" part refers to 5 functions it can perform including a pump, water tank, ladders, hoses and rescue equipment.

1. Incident Commander
   Fire Chief
2. Chief Investigator
   Safety Officer

The Incident Commander is an integral part of organization for firefighting. An Incident Commander must be able to delegate responsibility and keep track of subordinates to ensure safety and smooth operations in order to minimize risk at all times.

1. Pre-Assault Safety System
   Personal Access Safety System
2. Personal Alert Safety System
   Pressurized Air Safety System

The Personal Alert Safety System is an alarm that all firefighters should be equipped with. It can sense when a firefighter is exposed to a rapid temperature increase or has remained still for an extended period and may require assistance.

1. Indicating more firefighters have arrived
   A warning to keep the public back from the structure
2. To set up a rallying point
   A warning to escape a building that's about to collapse

When firefighters are in a building and it becomes clear that the structure has become so damaged that a collapse is imminent, air horns can signal those inside they need to leave immediately.

1. 12 to 20 breaths per minute
   5 to 10 breaths per minute
2. 25 to 33 breaths per minute
   35 breaths per minute

The normal respiration rate for an adult is around 12 to 20 breaths per minute. Anything lower or higher than that should be cause for alarm.

1. 7
   5
2. 10
   15

The National Fire Protection Agency limits the number of subordinates one supervisor can manage to 7. This is a safety issue, as having too many people in a tense and dangerous situation can obviously lead to oversights and accidents.

1. Smoke
   Toxic fumes
2. Lack of oxygen
   All of the above

There's no one single danger when breathing in the air during a fire, as fumes from toxic substances, a lack of air and smoke inhalation can all cause serious health issues and death.

1. Water conducts electricity.
   Water can't get into the wiring.
2. Water spreads an electrical fire.
   Electrical fires burn too hot.

The big danger with water around electricity is the fact water can conduct electricity. If firefighters are standing in pools of water, they run the risk of being electrocuted.

1. Water
   Foam
2. Dry powder
   Chemical extinguishers

Because Class D fires are fueled by metals, many of which can be very reactive, water would actually make them worse. A dry powder extinguisher will smother the fire and also absorb the heat.

1. 60 to 100 beats per minute
   40 to 60 beats per minute
2. 100 to 120 beats per minute
   20 to 40 beats per minute

A normal, healthy heart rate should be around 60 to 100 beats per minute. A person very likely requires medical attention if they fall below or above that range.