BOF Exam Questions with Correct Answers |
Latest 2026
What are wet chemicals, dry powders, and water with additives examples of?
Extinguishing agents
Fire extinguishers weighing up to 40 pounds must be mounted so that the top is not more
than how many feet above the floor?
5 feet
What is another name for a combination ladder?
Multipurpose ladder
Monoammonium phosphate is also known as what?
Ammonium phosphate
Ladders must meet the performance requirements described in which NFPA standard?
NFPA 1960
NFPA _____ is the standard for Aircraft Rescue and Firefighting Vehicles.
1900
What do firefighters use for tasks such as rescuing victims and gaining access to upper
floors?
Ladders
What converts fatty acids in cooking oils or fats to a soap or foam?
,Wet-chemical extinguishing agent
What are required of all fires for continued combustion?
Fuel, heat, oxygen, and a sustained chemical reaction
The pictograph of a flame and a gasoline can represent which class of extinguisher?
Class B
A stored-pressure water-type fire extinguisher with a 2-A rating carries how many gallons
of water?
2.5 gallons
What is a water-soluble, flammable liquid such as alcohol or acetone called?
Polar solvent
Wheeled fire extinguishers typically contain how many gallons of extinguishing agent?
100 to 200 gallons
When climbing a ladder, what is more secure because it maintains three contact points?
Sliding the hands along the beam
Firefighters should maintain how much clearance between a ladder and utility lines?
At least 10 feet
What are two disadvantages of a wood ladder?
Heavier weight and higher cost
What do firefighters typically do before stepping onto a roof from a ladder?
,Sound the roof
The pictograph of a flame and a metal gear represents which class of extinguisher?
Class D
Which type of ladders can be damaged by prolonged exposure to direct sunlight?
Fiberglass
What is sometimes referred to as an attic ladder?
Folding ladder
When climbing a ladder, where should you keep your eyes focused?
Forward
What is the estimated height of a residential structure floor to floor?
8 to 10 feet
Where would be an appropriate location for a Class K portable extinguisher?
Commercial kitchen
What is the only dry-chemical extinguishing agent rated as suitable for use on Class A
fires?
Monoammonium phosphate
What is constructed with one layer of woven fiber?
Single-jacket hose
What indicates the position of the first thread on a coupling?
, Higbee indicator
What type of stream is very dispersed and provides the shortest reach?
Fog
What type of hose roll is used for general handling and transportation of hose?
Straight
What is an appliance equipped with two valves to control water flow independently?
Gated wye
What device is used to temporarily cut off water flow in a fire hose?
Hose clamp
In what arrangement can the rolled hose be connected and extended by one firefighter?
Single-doughnut hose roll
What type of stream is a hollow cone pattern of water composed of tiny droplets?
Straight
What is a 2½-in. hose most often used for?
Interior attacks in large buildings and exterior attacks
What must hose that has come into contact with petroleum-based products be cleaned
with?
Mild detergent and water
What is the straight hose roll also referred to as?
Latest 2026
What are wet chemicals, dry powders, and water with additives examples of?
Extinguishing agents
Fire extinguishers weighing up to 40 pounds must be mounted so that the top is not more
than how many feet above the floor?
5 feet
What is another name for a combination ladder?
Multipurpose ladder
Monoammonium phosphate is also known as what?
Ammonium phosphate
Ladders must meet the performance requirements described in which NFPA standard?
NFPA 1960
NFPA _____ is the standard for Aircraft Rescue and Firefighting Vehicles.
1900
What do firefighters use for tasks such as rescuing victims and gaining access to upper
floors?
Ladders
What converts fatty acids in cooking oils or fats to a soap or foam?
,Wet-chemical extinguishing agent
What are required of all fires for continued combustion?
Fuel, heat, oxygen, and a sustained chemical reaction
The pictograph of a flame and a gasoline can represent which class of extinguisher?
Class B
A stored-pressure water-type fire extinguisher with a 2-A rating carries how many gallons
of water?
2.5 gallons
What is a water-soluble, flammable liquid such as alcohol or acetone called?
Polar solvent
Wheeled fire extinguishers typically contain how many gallons of extinguishing agent?
100 to 200 gallons
When climbing a ladder, what is more secure because it maintains three contact points?
Sliding the hands along the beam
Firefighters should maintain how much clearance between a ladder and utility lines?
At least 10 feet
What are two disadvantages of a wood ladder?
Heavier weight and higher cost
What do firefighters typically do before stepping onto a roof from a ladder?
,Sound the roof
The pictograph of a flame and a metal gear represents which class of extinguisher?
Class D
Which type of ladders can be damaged by prolonged exposure to direct sunlight?
Fiberglass
What is sometimes referred to as an attic ladder?
Folding ladder
When climbing a ladder, where should you keep your eyes focused?
Forward
What is the estimated height of a residential structure floor to floor?
8 to 10 feet
Where would be an appropriate location for a Class K portable extinguisher?
Commercial kitchen
What is the only dry-chemical extinguishing agent rated as suitable for use on Class A
fires?
Monoammonium phosphate
What is constructed with one layer of woven fiber?
Single-jacket hose
What indicates the position of the first thread on a coupling?
, Higbee indicator
What type of stream is very dispersed and provides the shortest reach?
Fog
What type of hose roll is used for general handling and transportation of hose?
Straight
What is an appliance equipped with two valves to control water flow independently?
Gated wye
What device is used to temporarily cut off water flow in a fire hose?
Hose clamp
In what arrangement can the rolled hose be connected and extended by one firefighter?
Single-doughnut hose roll
What type of stream is a hollow cone pattern of water composed of tiny droplets?
Straight
What is a 2½-in. hose most often used for?
Interior attacks in large buildings and exterior attacks
What must hose that has come into contact with petroleum-based products be cleaned
with?
Mild detergent and water
What is the straight hose roll also referred to as?
