Fire Behavior Flashcards
Reactions that absorb energy are called: (75)
A. kinetic.
B. exothermic.
C. endothermic.
D. passive reactions.
C
The oldest and simplest model used to describe fire behavior is known as the: (76)
A. fire triangle.
B. ignition line.
C. fire tetrahedron.
D. combustion pathway.
A
Which of the following occurs when burning is localized on or near the fuel’s surface, where it is in contact with oxygen? (76)
A. Flaming combustion
B. Primary combustion
C. Secondary combustion
D. Nonflaming combustion
D
Which of the following exists in many forms including chemical, mechanical, and electrical? (78)
A. Heat
B. Energy
C. Compression
D. Temperature
B
Which type of ignition occurs without any external flame or spark? (79)
A. Autoignition
B. Kinetic ignition
C. Piloted ignition
D. Secondary ignition
A
The most common source of heat in combustion reactions is: (80)
A. light energy.
B. chemical energy.
C. electrical energy.
D. mechanical energy.
B
Which type of heat transfer occurs when a material is heated as a result of direct contact with a heat source? (83)
A. Radiation
B. Convection
C. Conduction
D. Penetration
C
Which process usually involves the transfer of heat through the movement of hot smoke and fire gases? (84)
A. Radiation
B. Convection
C. Conduction
D. Penetration
B
Which type of heat transfer travels through vacuums and air spaces? (87)
A. Radiation
B. Convection
C. Conduction
D. Penetration
A
Materials that absorb heat, but do not contribute fuel in the combustible reaction are known as: (87)
A. passive agents.
B. inactive agents.
C. conductive agents.
D. nonreactive agents.
A
What physical state must fuel be in for flaming combustion to occur? (89)
A. Gas
B. Solid
C. Liquid
D. Either gas or liquid
A
What occurs as solid fuels are heated and begin to decompose and give off combustible vapors? (91)
A. Pyrolysis
B. Autoignition
C. Vaporization
D. Sustained chemical reaction
A
Which type of fire consists of ordinary combustibles such as wood, cloth, and paper? (96)
A. Class A
B. Class B
C. Class C
D. Class D
A
Which type of fire consists of flammable liquids and gases such as gasoline, oil, and methane? (96)
A. Class A
B. Class B
C. Class C
D. Class D
B
Which type of fire consists of combustible metals such as aluminum and magnesium? (98)
A. Class B
B. Class C
C. Class D
D. Class K
C
Which type of fire must have an extinguishing agent that uses saponification? (98)
A. Class A
B. Class C
C. Class D
D. Class K
D
All other factors being equal, a fire in a large compartment will develop: (101)
A. more slowly than one in a small compartment.
B. more quickly than one in a small compartment.
C. at the same rate as one in a small compartment.
D. at approximately twice the rate of one in a small compartment.
A
Which of the following thermal properties of a compartment maintains temperature by absorbing and releasing large amounts of heat slowly? (102)
A. Fuel load
B. Retention
C. Insulation
D. Heat reflectivity
B
During what stage is the fire releasing the maximum amount of heat possible for the available fuel and oxygen? (107)
A. Decay
B. Growth
C. Incipient
D. Fully developed
D
Which stage occurs when the oxygen concentration falls to the point that flaming combustion is diminished? (108)
A. Decay
B. Growth
C. Incipient
D. Fully developed
A
Which of the following statements about a physical change is MOST accurate? (74)
A. A physical change does not involve an exchange of energy.
B. A physical change is accompanied by some type of chemical change.
C. The substance undergoes chemical changes that affect size, shape, or appearance.
D. The substance remains chemically the same but changes in size, shape, or appearance.
D
Which of the following is MOST correct about what occurs in a chemical reaction? (75)
A. A chemical reaction occurs very slowly.
B. A chemical reaction only involves one substance.
C. A substance changes in size, shape, or appearance.
D. A substance changes from one type of matter into another.
D
Which occurs with rapid oxidation? (75)
A. Rust
B. Combustion
C. Smoldering
D. Vaporization
B
Reactions that give off energy are called: (75)
A. kinetic.
B. exothermic.
C. endothermic.
D. active reactions.
B