Extinguishers
This extinguisher class is used for electrically charged components on fire.
What is Class C?
This radio channel number is used for tactical operations. We usually just call it Fireground.
What is channel 4?
Brick and mortar, not very exciting
What is Ordinary?
This is how often you need to polish all the brass work in the firehouse.
What is semi-weekly?
The CFD calibrates its multi-meters to this gas.
What is methane?
The symbol for this extinguisher class is a green triangle.
What is Class A?
You're calling Englewood but you get a response from Main. You must be on this number channel.
What is channel 1?
The Willis Tower is an example of this construction type. It's number one!
What is Fire Resistive?
You might have been up all night but the off-going shift is responsible for snow removal until this time.
What is 0730 hours?
This level of Lower Explosive Limit will set off the Low Level Alarm on the multi-gas monitor.
What is 10% of the LEL?
This class of extinguishers use dry powder, not dry chemicals.
What are Class D extinguishers?
At a 2-11, the Plans Chief will most likely have all companies in staging switch to this channel.
What is OPS Channel 10?
Large dimension lumber is used in what I suppose is the lumberjack's favorite construction.
What is heavy timber (mill) construction?
If the water is too cold, you can turn up the hot water tank temperature, but don't go over this temperature.
What is 105 degrees Fahrenheit?
If you are outdoors for a gas leak, the SOP says to call for a Level One at this percentage of the LEL.
What is 25% LEL?
The symbol on this class of extinguishers is a colored square.
What is Class B?
If there are two incidents in close proximity, what should be the tactical channel (Fireground) for the second incident?
What is OPS Channel 9?
It's made of wood and often covered in siding.
What is frame constructed?
Bill and Ted know not to set the thermostat any higher than this many degrees. It's their favorite number.
What is 69 degrees?
If the oxygen reading around you drops to this level the multi-gas monitor will sound a low level alarm.
What is 19.5%?
This class of extinguishers are filled with Potassium Acetate mixture. Potassium also has this chemical symbol on the periodic table.
What is Class K?
You get a report of a person in the water. What channel is used to talk with Chicago Park District lifeguards?
What is the LAKEFRNT channel? (Channel 14)
Masonry on the outside but unprotected lightweight steel trusses for roof structure.
What is non-combustible?
Unless there is unseasonable weather, air conditioners are not to go on before this date.
What is May 15?
The flammable limits for natural gas fall between these two percentages.
What are 5% and 15%?