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Dashboard
Fire Inspector
Chapter 13
Knowledge Check
1.
Which dry-chemical system component releases agent into the piping system?
Nozzles
Hydrants
Storage container
Actuating mechanism
2.
The special-agent fire extinguishing system most effective on fires in commercial cooking equipment that produces grease-laden vapors is a:
dry powder system.
clean agent system.
dry-chemical system.
wet-chemical system.
3.
Which class of fire involves energized electrical equipment?
Class A
Class B
Class C
Class D
4.
Which type of foam fire extinguishing system is wheel mounted and may have a water supply connection capability?
Fixed
Mobile
Portable
Semifixed
5.
The stage of foam formation that mixes water with foam liquid concentrate is:
aeration.
blending.
separating.
proportioning.
6.
Which foam proportioner allows for automatic proportioning over a wide range of flows and pressures and does not depend on an external power source?
Around-the-pump proportioner
Balanced pressure proportioner
Pressure proportioning tank system
Coupled water motor-pump proportioner
7.
Which type of dry powder agent is sodium chloride (salt) based?
Halon
NA-X®
LITH-X®
MET-L-X®
8.
Which type of dry-chemical fixed application method introduces a concentration of agent into a closed area?
Total flooding
Local application
Fire extinguishers
Handheld hoseline
9.
Which foam expansion rate is useful as a space-filling agent?
Trace
Low
Medium
High
10.
Which fire extinguisher agent is subject to freezing if not kept in a heated area or an antifreeze agent added?
Foam
Water
Dry chemical
Carbon dioxide (CO2)
11.
Clearance between the bottom of the extinguisher and the floor should never be less than:
3 inches (76 mm).
4 inches (100 nun).
5 inches (127 mm).
6 inches (152 mm).
12.
What is the greatest concern for extinguisher reliability?
Placement
Distribution of units
Type of agent used in units
Temperature of the environment
13.
What is critical to total flooding applications of carbon dioxide (CO2) systems in order for them to be effective?
Room integrity
Predischarge alarms
Cost of maintenance
Proper training in use
14.
The system used when water alone may not be an effective fire extinguishing agent is a:
foam system.
dry powder system.
dry-chemical system.
carbon dioxide (CO2) system.
15.
Which of the following tasks regarding dry-chemical systems is an Inspector I MOST likely to be required to perform?
Inspect new installations
Conduct acceptance tests
Evaluate application methods
Evaluate inspection and testing requirements
16.
Which foam expansion rate is used primarily to extinguish fires involving liquid fuels?
Trace
Low
Medium
High
17.
What is required for a special-agent extinguishing system to be considered successful?
The cost of maintenance
Ease of use by occupant/owners
It must completely extinguish the fire
It controls or contains a fire until the fire department arrives
18.
How are special-agent fire extinguishing systems classified?
By the type of occupancy
By the type of fire they will extinguish
By the type of agent used in the system
By the amount of time it takes to expel the agent
19.
Which fire extinguisher agent extinguishes primarily through a smothering action?
Foam
Water
Dry chemical
Carbon dioxide (CO2)
20.
Wet-chemical fire extinguishing agents are delivered to the hazard area in the form of a:
drip.
foam.
spray.
stream.
21.
Which type of fire extinguisher stores expellant gas and extinguishing agent in a single chamber?
Loaded-stream extinguisher
Pump-operated extinguisher
Stored-pressure extinguisher
Cartridge-operated extinguisher
22.
Which type of clean system agent is no longer produced but may still be in service?
Halon
NA-X®
LITH-X®
MET-L-X®
23.
Which type of foam system method extinguishes a fire by intervening between the fuel and the fire?
Cooling
Separating
Smothering
Suppressing
24.
The four elements necessary to produce high-quality fire fighting foam include foam concentrate, water, mechanical agitation, and:
air.
gas.
halon.
carbon dioxide (CO2)-
25.
When rapid fire extinguishment is required and reignition is unlikely:
dry powder systems are used.
clean agent systems are used.
dry-chemical systems are used.
wet-chemical systems are used.
26.
The general category of fire extinguishing agents that effectively leaves no residue is a:
foam system.
clean agent system.
dry-chemical system.
carbon dioxide (CO2) system.
27.
What is the biggest disadvantage to dry-chemical systems?
Cost
Difficult to find
Complicated to use
Require extensive cleanup
28.
What percentage of finished foam is water?
1% to 5%
45 1/ 2% to 50%
94% to 99 1/ 2%
100%
29.
How are portable fire extinguishers classified?
Type of fire they will extinguish
Type of agent used in the system
Amount of time it takes to expel the agent
Type of occupancy in which they are located
30.
Which foam proportioner is the most common type of built-in proportioner installed in mobile fire apparatus?
Around-the-pump proportioner
Balanced pressure proportioner
Pressure proportioning tank system
Coupled water motor-pump proportioner
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