There are typically three types of extinguishers found at the university.  Together they are designed to control the three most common types of fires, Class A, Class B, and Class C.  (Class D fires are very unusual and where specific combustible metals are used, special fire extinguishers are in place.)
 
 
 
 

The most numerous type of extinguisher on campus is the Dry Chemical ABC extinguisher, shown to the right.  The label indicates by pictograms that it is rated for use on all three classes of fire.
 
 
 
 
 
 
 
 

This type of extinguisher is a Carbon Dioxide BC type and the label indicates it is safe for use on Class B and C fires.  These are primarily located in laboratories and around electronic equipment, as the extinguishing medium is less likely to harm other equipment in the area of discharge.
 
 
 
 
 
 

This type of extinguisher, while looking very much like the Dry Chemical ABC, is labeled differently and is a specialized extinguisher found in kitchen areas with hood extinguishing systems over the cooking areas.  It is designed for use on Class B and C fires and is compatible with the extinguishing medium in the hood system.  This is a Dry Chemical BC extinguisher.
 
 
 
 

In order to continue with this tutorial, you must choose the correct answer:
Which type of fire extinguisher can be used on a fire whose fuel source is gasoline?
a.    Dry Chemical ABC
b.    Dry Chemical BC
c.    Carbon Dioxide BC
d.    All of the above