Chapter 19
In general, when should a sprinkler system be shut down?
A) Prior to beginning salvage operations
B) When overhaul is complete
C) When the fire is completely extinguished
D) When the fire is under control
C) When the fire is completely extinguished
Which material is prone to spalling under fire conditions?
A) Steel
B) Wood
C) Concrete
D) Fiberglass
C) Concrete
Telecommunicators should use _________ listening.
A) critical
B) active
C) interrogatory
D) interpretive
B) active
At a structure fire, a continuous water supply is unavailable. Which type of operation is appropriate?
A) Direct
B) Transitional
C) Defensive
D) Offensive
C) Defensive
Which is one of the three factors in solid fuel configuration?
A) Surface-to-mass ratio
B) Chemical composition
C) Moisture content
D) Heat release rate
A) Surface-to-mass ratio
Which items are best overhauled outside the structure?
A) Appliances
B) Books/documents
C) Furniture
D) Clothing/wardrobe
C) Furniture
The primary purpose of the __________ is to transfer the weight of the building and its contents to the ground.
A) foundation
B) floor joists
C) piers
D) purlin
A) foundation
What is the function of the PTT button on a two-way radio?
A) Adjust the sensitivity of signal reception
B) Enable duplex transmission
C) Cause the radio to transmit
D) Transmit a distress signal
C) Cause the radio to transmit
Which type of foam proportioner relies on the Venturi effect?
A) Eductor
B) Injector
C) Aspirator
D) Inductor
A) Eductor
What is the term for temperature in a room reaching the point where all exposed surfaces in room ignite?
A) Autoignition
B) Flashover
C) Backdraft
D) Rollover
B) Flashover
During salvage operations, rolls of polyethylene film are particularly useful for protecting:
A) high-piled stock.
B) long surfaces.
C) office equipment.
D) cabinets/bookshelves.
B) long surfaces.
Which is the most likely location of a curtain wall?
A) Exterior of a high-rise
B) Open stairwell
C) Ceiling area of a large, open interior space
D) High fire hazard industrial facility
A) Exterior of a high-rise
The Americans with Disabilities Act requires that communications centers be able to receive calls by which medium?
A) Personal digital assistant (PDA)
B) Walk-in
C) Radio transmission
D) TTY/TDD
D) TTY/TDD
What is the target of the hose stream in a direct attack?
A) The burning surfaces
B) Hot overhead gases
C) Exposure surfaces
D) The most threatened exposure
A) The burning surfaces
Heat rising within a structure is primarily caused by which form of heat transfer?
A) Circulation
B) Radiation
C) Conduction
D) Convection
D) Convection
What is a limitation of backpack water vacuums?
A) Lift is limited to approximately 3 ft
B) They cannot be worn with SCBA
C) They must be used in a well-ventilated area
D) They cannot be used with dirty water
B) They cannot be worn with SCBA
Which term means the weight of a building without contents?
A) Net weight
B) Dead load
C) Live load
D) Curb weight
B) Dead load
What is the usual response when a caller disconnects before full information can be gathered and the dispatcher cannot reconnect by calling the caller back?
A) Log the incident and wait for the caller to call back
B) Send a full complement of responders, including police, EMS, and fire
C) Dispatch a police unit to check on the caller
D) Send a single engine to assess the situation
C) Dispatch a police unit to check on the caller
Where should streams be directed to prevent a BLEVE?
A) On the relief valve
B) At the tank ends
C) At the area where the tank is being heated
D) On the protective dome
C) At the area where the tank is being heated
What is the term for the spontaneous ignition of hot gases at the upper level of a room?
A) Ghosting
B) Flashover
C) Rollover
D) Mushrooming
C) Rollover
The lighting and power equipment used at an emergency scene generally operates at:
A) 110-volt DC.
B) 220-volt DC.
C) 110-volt AC.
D) 220-volt AC.
C) 110-volt AC.
The structural components of a Type _____ building must be made of noncombustible materials.
A) II
B) III
C) IV
D) V
A) II
Which agency licenses a fire department to operate a radio system?
A) Federal Communications Commission
B) The state office of emergency services
C) Federal Office of Communications
D) Federal Emergency Management Agency
A) Federal Communications Commission
Which type of foam contains a surface-active agent that produces a fast-spreading film?
A) High expansion
B) Fluoroprotein
C) Aqueous film-forming
D) Class A
B) Fluoroprotein
The majority of fires are extinguished by which method?
A) Cooling the fuel
B) Excluding oxygen
C) Suppressing vapor emission
D) Inhibiting the chemical chain reaction
A) Cooling the fuel