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Q ~
Q2
The model number of
Federal Sign and Signal
Corporation's mechanical
"Growler" siren.
Also referred to as a
"Q".
Quad
A truck that carries a pump,
booster tank, hose and
ground ladders.
Quint
A truck equipped with
pump, booster tank, hose,
ground ladders and an aerial
ladder.
~
R ~
Red Line
Same as booster
line.
Relief
Valve
Prevents excessive
pressure on discharge lines
by bypassing water from
discharge side to the inlet
side of the pump.
Reverse Lay
When supply hose is
laid from the fire to the
water source, placing the
pump at the source of water.
(See also forward lay)
Roof
Ladder
A 14 to 16 foot ladder
equipped with deployable
hooks at one end. The ladder
is placed flat on a roof
with the hooks over the
peak, preventing the ladder
from sliding off. This
allows the fire fighters a
place to stand while
performing ventilation and
other roof operations.
~ S ~
Salvage Cover
Series
Pressure position in a
dual-impeller centrifugal
pump in which the first
impeller's discharge is fed
into the eye of the second
impeller which then
discharges the water from
the pump.
Siamese
Slow
Close Valve
Snorkel
A commercial term
denoting a ladder truck with
an articulating boom. The
Snorkel was made famous when
Chicago fire commission
Quinn saw the utility people
using an articulating boom
and decided it would work
perfect as a fire fighting
tool.
Soft Suction
A large diameter hose
used to hook up between a
pressurized water source and
a pumper. A non rigid hose
can be used as long as the
pressure from the hydrant is
greater than what the pumper
is taking in, otherwise the
hose would collapse.
Steamer
Connection
Large discharge port on
a hydrant
Stortz
A quarter turn coupling
that is typically used on
large diameter hose. This
type of connection was
developed in Europe and has
replaced the threaded
couplings on large hose.
Stretch
Bed
A hose bed that stores
hose that can be used as an
additional supply line,
supply line to another
vehicle or additional attack
lines.
Squad
A vehicle that carries
personnel and equipment.
Supply Line
Hose line used to
supply water from a hydrant
to fire apparatus. Many
departments use large
diameter hose (see above)
for this purpose. LDH is
sometimes referred to as a
water main above ground and
is usually 4-5
inches in diameter. However,
some departments use smaller
3 inch hose to supply water
at a fire.
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