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28 Cards in this Set

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Which of the following gases is lighter than air?




A) Sulfur hexafluoride.


B) Carbon dioxide.


C) Propane.


D) Natural gas.

Natural gas.




Because natural gas is lighter than air it will rise and accumulate in dead spaces.



You arrive at a single family residence reporting smoke in the basement after an apparent lightening strike during a summer thunderstorm. As you enter the basement you observe that lightening has entered through the natural gas line from the outside, and the line has been severed and is now on fire. What should you do?



A) Extinguish the fire, and immediately exit the building to shut the gas off from the outside.


B) Exit the building without extinguishing the fire, and shut the gas off from the outside.


C) Extinguish the fire and apply a constant fog stream on the severed line until the gas is turned off from the outside.


D) Allow the fire to burn, but protect adjacent combustibles, until the gas is turned off from the outside.






Allow the fire to burn, but protect adjacent combustibles, until the gas is turned off from the outside.



Electrical wiring that has been burned through poses a severe hazard to firefighters. When considering this, what areas should be considered off limits to firefighters?




A) Electrical vaults.


B) Manholes.


C) Substations and transformer rooms.


D) All the above.

All the above.




These areas should be left to qualified utility company representatives.


During an incident, it is important to minimize or eliminate problems associated with utilities. The task of utility control is usually assigned to -




A) Ladder company personnel.


B) Engine company personnel.


C) The safety officer.


D) Building maintenance personnel.






Ladder company personnel.



The best way for firefighters to become familiar with a building's utilities is to -




A) Study blueprints of the building.


B) Conduct preincident planning and inspections.


C) Rely on building maintenance personnel to inform you of the various hazards and obstacles.


D) Invite representatives from utility companies to come to the fire station and lecture on the various hazards of working around utilities.






Conduct preincident planning and inspections.




This is especially true for any building having any unusual, complex, or difficult utility systems.



What hazards are posed by forced air heating systems?




A) If a fire starts in the basement, smoke and other gases can move through the duct work to uninvolved areas.


B) Dust and fibrous materials tend to mat on the bottom of heating ducts over the years. If they become ignited, the fire may flash through the entire duct system.


C) The blower fan can draw fire and heated gases into the ducts, and move it through the system to uninvolved areas of the building.


D) All the above.

All the above.




Blower fans should be immediately shutdown during incidents involving forced air heating systems. Some larger forced-air systems have smoke detectors that monitor the air in the duct work. If the detector senses smoke, the system will be shut down.All the above.




Some larger heating systems are equipped with dampers that close automatically to seal off portions of the ductwork and isolate the fire. How are these dampers activated?




A) Smoke detectors in the duct will activate the damper when smoke is detected.


B) Heat detectors on the ceiling of the building are wired to these dampers. If heat is detected, the dampers will automatically close.


C) The damper is spring loaded and held open by a fusible link.


D) All dampers will close when the heating system is shut down.

The damper is spring loaded and held open by a fusible link.




The problem with these systems is that a great deal of smoke can pass through the ducts, before the heat is high enough to trigger the fusible link.

A box or area above the burner in a heating system where air is heated before being distributed throughout the heating and air conditioning system (HVAC) is called a -




A) Heat exchanger.


B) Plenum.


C) Mixing chamber.


D) Heating chamber.

Plenum.




A blower forces the warmed air through the ducts to the living areas and draws room air back to the plenum.



In older buildings, including theaters, halls and some other larger structures, an obsolete type of air circulation system is installed, that includes large ducts that extend throughout the building and are connected to a huge air intake and blower, usually located in the basement. How are these systems controlled?




A) Manually.


B) From temperature sensors within the ductwork.


C) Remotely from a board in the lobby or front hallway.


D) From a timer unit mounted at the blower assembly.



Manually.




These systems need to be shut down manually.

In residential structures heated with fuel oil furnaces in the basement, most building codes require that an emergency power switch should be located -




A) In the kitchen.


B) In the garage.


C) At the top of the basement stairs.


D) At least 20 feet from the oil burner unit.





At the top of the basement stairs.




They are also located at an outside basement entrance, or just inside an entrance to the building or basement.



You are on-scene in a basement in which the heating fuel oil line has been severed. Although power has been shut off to the unit, fuel is still flowing through the broken line. How are you going to shut off this fuel oil?




A) Close the flue shutoff valve located on the supply line right at the fuel tank.


B) The line is made of copper and the fuel shutoff is either frozen or none existent. Carefully squeeze the copper tubing together with pliers to stop the flow.


C) The line is made of heavy pipe and the fuel shutoff is either frozen or none existent. Cut the pipe and plug it.


D) All the above.

All the above.

Large oil-burning units, like the ones used in apartment buildings, office buildings, factories, schools and hospitals use -




A) No. 2 fuel oil.


B) No. 6 fuel oil.


C) No. 5 fuel oil.


D) No. 3 fuel oil.


No. 6 fuel oil.




No. 6 fuel oil is a heavier oil and it will not ignite as readily as No. 2 fuel oil. Many of these systems include a device that preheats the fuel oil before it is burned.

Kerosene heaters are usually -




A) Self-contained units.


B) Connected to outside above ground storage tanks.


C) Connected to a separate heat distribution system.


D) Equipped with remote emergency switches.

Self-contained units.




Kerosene burning units do not usually have remote emergency switches. All the controls are on the unit itself.



When a fire has involved an area around a heater that has a self-contained fuel tank -




A) The fire danger is usually reduced if power is shut off to the unit.


B) A pressure relief valve will open if the temperature inside the tank rises to an unsafe level.


C) There is a great risk that the tank will explode and throw flaming fuel throughout the entire room.


D) The fire danger is relatively low, since self-contained fuel tanks are highly insulated.



There is a great risk that the tank will explode and throw flaming fuel throughout the entire room.




Firefighters should approach these rooms with extreme caution.



Many jurisdictions require that the municipal gas main shutoff be located -




A) At the front entrance of the building.


B) In the same area as where other utilities enter the building.


C) In plain sight outside of any building served by gas lines.


D) In the basement area of the building where the main enters into the building.



In plain sight outside of any building served by gas lines.




The shutoff may be painted a distinctive color and marked "emergency gas shutoff." When the outside main is not provided, the gas shutoff is located on or near the gas meter inside the building.



The weakest link in a gas supply system is the -




A) Storage tank.


B) Burner jet.


C) Gas meter.


D) Gas piping.

Gas meter.




A meter located in any fire involved area will generally fail before the piping does. When the meter fails, the escaping gas will ignite and form a burning jet.



If a gas meter does fail during a fire, and becomes ignited, how should it be extinguished?




A) With a broad fog stream with the nozzle set at 30 degrees.


B) With a straight stream.


C) Intermittently flowing a fog stream on it for only a few seconds, then waiting approximately 10 seconds and repeating the process.


D) By shutting off the gas in the line.



By shutting off the gas in the line.




Never extinguish a gas fire. Always shut the fuel off. No fuel no fire.



When a fire involves the area in which a bank of gas meters is located, large amounts of gas can be released. How should the gas be turned off?




A) The street valve should be closed.


B) All gas valves should be closed in the bank.


C) Only the gas valves in the areas involved in the fire should be closed.


D) The main gas feed line should be cut and plugged by a qualify gas company employee.



The street valve should be closed.




Ladder company personnel should be familiar with the locations of street valves, the main shutoff, inside and outside gas meters, and individual gas appliance shutoff valves.

Where are the gas meters located for residences using bottled gas?




A) At the storage tank.


B) Usually there are no meters.


C) At the main junction inside the building.


D) In the basement at the location where the bottle gas line enters the residence.



Usually there are no meters.




Gauges and the shutoff valve are located at the top of the cylinder or on the supply line if several tanks are used.



You arrive at a home that uses bottled gas, for a gas leak in a line inside the basement. Your crew is on the outside of the building attempting to close the valve at the cylinder, but for some reason the valve is frozen and will not turn. How are you going to stop this gas leak?




A) Move back a safe distance and call the gas company for help.


B) Force the valve using a rubber mallet.


C) Carefully squeeze the copper line with pliers.


D) Carefully remove the gas line from the bottle and plug the opening with a wooden dowel which is tapered to a point.







Carefully squeeze the copper line with pliers.

Bottled gas cylinders have relief valves or plugs to relieve the cylinder pressure in case of fire. What should you do if a relief valve has been actuated, and a jet of burning gas is issuing from the cylinder?




A) Allow the gas to burn and retreat to a safe distance.


B) Cool the area around the issuing gas jet with a fog stream.


C) Cool the area around the issuing gas jet with a straight stream.


D) Move close to the cylinder, protected by a fog stream, and attempt to close the valve

Cool the area around the issuing gas jet with a fog stream.




You should allow the fire to burn, and cool the area around the fire with a fog stream so combustibles in the area will not ignite. Closing the valve will do nothing since the pressure relief valve has already blown.



You are on-scene at an apartment fire that involves several floors of the building. One of the first thoughts that come to mind is when should power be cut to the building. Which of the following would be the deciding factor as to when to cut the power?




A) When search and rescue operations have been completed.


B) When all occupants have safely left the building.


C) The fact that the building is on fire, and that an electrical hazard exists is reason to shut the power off immediately.


D) When conditions in the building indicate that electrical features may endanger firefighters.



When conditions in the building indicate that electrical features may endanger firefighters.




Building lights help search and rescue efforts. They also make egress of occupants easier and with less panic. Power in the building also facilitates running ventilation fans, and portable lights, but if conditions dictate that the firefighters are in danger from electrical hazards, then the power should be cut.

What is the required electrical voltage in most dwellings?




A) 110 volts.


B) 220 volts.


C) 440 volts.


D) It ranges from 110 to 220 volts, depending on what appliances are being used.






It ranges from 110 to 220 volts, depending on what appliances are being used.

Modern electrical service to a one or two family dwelling can be shut off by pulling or removing the electrical meter. Who should accomplish this?




A) Ladder company personnel.


B) Engine company personnel.


C) A utility company representative.


D) The fire department safety officer.




A utility company representative.



Which of the following statements regarding elevators is not true?




A) Elevators are usually powered by their own electrical source, separate from the remainder of the building.


B) Firefighters must follow standard operating guidelines and use extreme caution when using elevators in the fire building.


C) If power is lost to the elevators, the elevators will no longer work.


D) Firefighters should not use elevators if at all possible in a building whose main electrical power has been lost.


If power is lost to the elevators, the elevators will no longer work.




If power is lost to the elevators, usually a number of the elevators will be able to operate on emergency power.



In communities that meter water, the shutoff is usually located -




A) Near the meter at the front of the building.


B) In the basement.


C) At the street.


D) All the above.

All the above.

Small structures that utilize oil-burners burn what kind of fuel and have an ____________ that stops the pumps.

Small structures that utilize oil-burners burn #2 fuel and have an emergency shut-off that stops the pumps.

Larger structures typically utilize what type of fuel that is more/less flammable than kerosene???

Larger structures typically utilize #6 fuel that is less flammable than kerosene.