Duh
Which of the following is a side of the fire triangle?
A) Catalyst
B) Heat
C) Chemical chain reaction
D) Ignition source
B) Heat
Which state must a fuel be in for combustion to take place?
A) Solid
B) Liquid
C) Vapor
D) Solid, liquid, or vapor
C) Vapor
Which form of heat transfer consists of kinetic energy moving from one particle to another?
A) Induction
B) Reduction
C) Conduction
D) Convection
C) Conduction
Which toxic gas is commonly produced by fire?
A) Hydrogen sulfide
B) Nitrogen sulfide
C) Hydrogen cyanide
D) Acrolein
C) Hydrogen cyanide
What is the term for the lowest temperature at which a liquid produces enough flammable vapor to burn momentarily?
A) Fire point
B) Ignition temperature
C) Flammable range
D) Flash point
D) Flash point
Fires involving combustible cooking media, such as oils and grease, are considered Class _____.
A) E
B) F
C) G
D) K
D) K
What does smoke puffing in and out of a structure indicate?
A) Impending structural collapse
B) Backdraft conditions
C) Growth-phase fire
D) Imminent flashover
B) Backdraft conditions
The majority of fires are extinguished by which method?
A) Cooling the fuel
B) Excluding oxygen
C) Suppressing vapor emission
D) Inhibiting the chemical chain reaction
A) Cooling the fuel
What is the method of choice for extinguishing most Class B fires?
A) Excluding the oxygen
B) Cooling the fuel
C) Interrupting the chemical chain reaction
D) Dispersing the vapors
A) Excluding the oxygen
An endothermic reaction is one that __________.
A) requires a catalyst
B) absorbs heat
C) occurs in the absence of oxygen
D) releases energy
B) absorbs heat
Heat transfer in the form of invisible waves is called __________.
A) conduction
B) radiation
C) convection
D) emission
B) radiation
What is the vapor density of air?
A) 0.0
B) 1.0
C) 14.7
D) 29.9
B) 1.0
What is another term for flammability limits?
A) Explosive limits
B) Volatility index
C) Oxidation range
D) Pyrophoric limits
A) Explosive limits
Flammable liquid fires are considered Class _____.
A) A
B) B
C) C
D) D
B) B
Which sign is an indication of possible backdraft conditions?
A) Turbulent, pressurized smoke
B) Vigorous flame productions
C) Windows broken out
D) Good interior visibility
A) Turbulent, pressurized smoke
The flash point of gasoline is _____.
A) –45ºF (–43ºC)
B) –15ºF (–26ºC)
C) 0ºF (–18ºC)
D) 32ºF (0ºC)
A) –45ºF (–43ºC)
Which geometric figure is used to represent the four elements required for a self-sustaining fire?
A) Pyramid
B) Square
C) Polygon
D) Tetrahedron
D) Tetrahedron
What is the term for a rapid oxidation and chemical process in which the combination of a substance with oxygen produces heat and light?
A) Combustion
B) Catalyzation
C) Vaporization
D) Pyrolysis
A) Combustion
The movement of heated gases in a fire is an example of which form of heat transfer?
A) Circulation
B) Radiation
C) Conduction
D) Convection
D) Convection
What is the percentage of oxygen normally found in air?
A) 14.7 percent
B) 18 percent
C) 19.5 percent
D) 21 percent
D) 21 percent
What is the term for the lowest temperature at which a liquid produces enough vapor to sustain a continuous fire?
A) Vaporization temperature
B) Flash point
C) Flame point
D) Ignition temperature
What is another term for fire point?
A) Ignition point
B) Flame point
C) Flash point
D) Autoignition temperature
B) Flame point
Which class of fire involves ordinary combustibles such as wood and paper?
A) A
B) B
C) C
D) D
A) A
The sudden introduction of air into an oxygen-depleted, superheated space may result in __________.
A) improved visibility
B) ghosting
C) backdraft
D) black fire
C) backdraft
Which term refers to the weight of a gas compared to air?
A) Specific density
B) Specific gravity
C) Vapor gravity
D) Vapor density
D) Vapor density
Which of the following is a component of a BLEVE?
A) A pressurized flammable liquid vessel
B) A “closed box” structure
C) A flammable gas leak
D) Contact with an energized electrical circuit
A) A pressurized flammable liquid vessel
A chemical reaction that produces heat is __________.
A) exothermic
B) thermodynamic
C) Isothermic
D) endothermic
A) exothermic
Heat traveling from one end of a steel beam to the other end is an example of __________.
A) convection
B) radiation
C) oxidation
D) conduction
D) conduction
A gas with a vapor density of _____ will rise in air.
A) 0.1
B) 1.0
C) 10
D) 100
A) 0.1
What is the lowest temperature at which a fuel–air mixture will ignite spontaneously called?
A) Fire point
B) Ignition temperature
C) Flash point
D) Specific heat
B) Ignition temperature
A Class C fire involves __________.
A) a flammable liquid or gas
B) energized electrical equipment
C) cooking material
D) a combustible metal
B) energized electrical equipment
What is the term for temperature in a room reaching the point where all the combustible contents of the room ignite?
A) Autoignition
B) Flashover
C) Backdraft
D) Rollover
B) Flashover
Which situation is indicated when you open a door and the smoke exits through the top half of the door and clean air enters through the bottom half?
A) Disturbance of thermal layering
B) An under-ventilated fire
C) The fire is on the same level as the door
D) Nonsurvivable conditions for occupants
C) The fire is on the same level as the door
When water is converted to steam, it occupies __________ space. Daily Double: Whats the expansion rate of water?
A) much more
B) somewhat more
C) about the same
D) somewhat less
A) much more
1700 times!
What is the term for the process in which oxygen combines chemically with another substance to create a new compound?
A) Oxidation
B) Combustion
C) Pyrolysis
D) Electrolysis
A) Oxidation
Which form of heat transfer travels in all directions?
A) Convection
B) Thermal radiation
C) Conduction
D) Direct contact
B) Thermal radiation
What is the second phase of fire?
A) Growth
B) Flameover
C) Fully developed
D) Incipient
We need a mnemonic for this!
A) Growth
What is the term for the lowest temperature at which a liquid produces enough vapor to sustain a continuous fire?
A) Vaporization temperature
B) Flash point
C) Flame point
D) Ignition temperature
C) Flame point
What is a danger to consider when attacking a Class C fire?
A) Electrical injury
B) Flashover
C) Permeation of PPE
D) Backdraft
A) Electrical injury
Turbulent smoke is an indication of impending __________.
A) flashover
B) mushrooming
C) self-ventilation
D) stratification
A) flashover
Which situation is indicated if you open a door and the smoke rises and the opening clears out?
A) The fire is ventilation controlled
B) The fire is in the decay phase
C) The fire is extinguished
D) The fire is above the level of the door
D) The fire is above the level of the door
What is the smallest unit of matter?
A) A molecule
B) A particle
C) An element
D) An atom
D) An atom
Which form of energy causes spontaneous heating of a pile of linseed oil-soaked rags?
A) Organic
B) Hypergolic
C) Exothermic
D) Chemical
D) Chemical
Friction is a form of __________ energy.
A) radiant
B) molecular
C) Mechanical
D) kinetic
C) Mechanical
During the _________ phase, fire has consumed either the available fuel or oxygen, and temperature drops.
A) isothermic
B) overhaul
C) incipient
D) decay
D) decay
Smoke that is produced by ordinary household materials when they are first heated has which sort of appearance?
A) Mustard yellow and lazy
B) Slow moving and white
C) Brown and fast moving
D) Black and thick
B) Slow moving and white
What is the term for high-volume, high-velocity, turbulent, ultra-dense black smoke?
A) Turbulent fire
B) Black fire
C) Endothermic fire
D) Laminar fire
B) Black fire
50.Which situation is indicated when you open a door and the smoke thins, but the smoke still fills the door?
A) The fire has reached thermal equilibrium
B) The fire has ventilated through another opening
C) There is a slow-moving, low-intensity fire
D) The fire is below the level of the door
D) The fire is below the level of the door
Matter exists in _____ states.
A) 3
B) 4
C) 5
D) 6
A) 3
Upward spread of fire within a structure is primarily caused by which form of heat transfer?
A) Circulation
B) Radiation
C) Conduction
D) Convection
D) Convection
What is the process called when a material decomposes upon being exposed to heat in the absence of oxygen?
A) Vaporization
B) Pyrolysis
C) Oxidation
D) Electrolysis
B) Pyrolysis
What is the term for the spontaneous ignition of hot gases at the upper level of a room?
A) Ghosting
B) Flashover
C) Flameover
D) Mushrooming
C) Flameover
What is the relationship between resistance and heat as electricity flows through a wire?
A) There is no relationship between the two
B) As resistance increases, heat increases
C) As resistance decreases, heat increases
D) As resistance increases, heat decreases
B) As resistance increases, heat increases