CAUTION
Q10.
What type of seawater pressure-operated
control valve allows the flow of seawater
All approved AFFF concen- trates have
from the firemain system to be mixed with
b e e n s u b j e c t e d t o 1 0 p e r c e n t s e awa t e r
AFFF concentrate?
tests for metals approved in AFFF generating
1.
Hycheck
systems. Contamination above the 10 percent
2.
Globe
limit causes two problems: (1) AFFF
generating system components will corrode
3.
Balancing valve
and (2) Improper AFFF/water solutions result
4.
Hytrol
in an ineffective fire-fighting agent.
Q11.
the correct amount of AFFF concentrate with
(ppm), the source of contamination must be identified
seawater?
and corrected before dumping the contents of the
1.
Hytrol
AFFF concentrate tank. Clean all AFFF concentrate
components before replenishing the service tank.
2.
Hycheck
Carry out all AFFF testing procedures according to
3.
Powertrol
the planned maintenance requirements.
4.
Balancing valve
REVIEW QUESTIONS
INSTALLED CARBON DIOXIDE (CO2)
Q7.
What type of pump for the installed AFFF
SYSTEMS
system is provided in capacities of 12, 27,
and 60 gpm?
Learning Objective: Recall the location, design, and
1.
High-speed reciprocal
operation of installed CO2 systems.
2.
Single-speed injection
Carbon dioxide (CO2) is a colorless, odorless gas
3.
Centrifugal
that is naturally present in the atmosphere at an average
4.
Two-speed injection
concentration of 0.03 percent. It is used for
extinguishing fires because it reduces the
Q8.
AFFF is stored in storage/transfer tanks
concentration of oxygen in the air to the point where
having a capacity of up to 3,500 gallons and
combustion stops. Typically, CO2 concentrations of
in service tanks that vary in capacity from
50 gallons to what maximum size?
30 to 70 percent are required to extinguish fires.
Carbon dioxide extinguishers are installed in naval
1.
1,000 gallons
ships to provide a dependable and readily available
2.
2,000 gallons
means to flood (or partially flood) certain areas that
3.
3,000 gallons
present unusual fire hazards. An installed CO2
4.
4,000 gallons
extinguishing system has one or more 50-pound
cylinders. The cylinders may be installed singly or in
Q9.
What type of seawater pressure-operated
control valve allows the flow of
batteries of two or more. Except for their size and
AFFF/seawater solution through the
releasing mechanisms, the 50-pound portable
distribution system or controls seawater flow
cylinders are essentially the same as the 15-pound
on flight deck AFFF injection systems?
portable cylinders.
1.
Hytrol
The two types of installed CO2 systems are the
2.
Balancing valve
CO2 hose-and-reel installation and the CO2 flooding
3.
Powertrol
system. The CO2 flooding system is used for spaces
4.
Hycheck
that are not normally occupied by personnel.
6-12