Answers (A+ Solutions)
. What are the four elements required to produce a fire?
ANSWER Fuel, oxygen, heat, and a chemical chain reaction.
. What is the definition of flashover?
ANSWER The sudden transition of a fire from a localized, growing
phase to a fully developed fire where all combustible materials in the
compartment ignite simultaneously.
. What type of building construction features noncombustible exterior
walls, but interior structural elements may be constructed of wood?
ANSWER Type III (Ordinary) construction.
. According to modern fire dynamics, what is the primary danger of
ventilating a wind-impacted structure prior to applying water to the
fire?
ANSWER It can create a rapid flow path that introduces oxygen,
causing an immediate increase in fire development and potential for a
ventilation-induced flashover.
, . What does the acronym PASS stand for regarding portable fire
extinguishers?
ANSWER Pull, Aim, Squeeze, Sweep.
. What is the minimum required burst pressure for a fire hose used for
structural firefighting?
ANSWER 900 psi.
. What type of heat transfer involves the movement of heat through a
fluid medium such as air or water?
ANSWER Convection.
. What is the primary function of a relief valve on a fire pump?
ANSWER To prevent the pump from overpressurizing the discharge
lines.
. What is the term for the horizontal distance between the base of a
ladder and the top of the wall it is placed against?
ANSWER The setback or foot distance.
. What is the correct ladder angle ratio for ground ladders?
ANSWER 1:4 ratio (1 foot of distance from the wall for every 4 feet of
ladder height).