Q19. An electrical motor fire is best extinguished by using CO2 because it:
Q20. The extinguishers suitable for Class B fires can be identified by a _________ containing the letter B.
Q21. Extinguishers suitable for Class C fires can be identified by a ____________ containing the letter C.
Q22. A multipurpose dry chemical extinguisher is rated for Class ________ fires.
Q23. A red square containing a letter indicates an extinguisher to be used on _____ fires.
Q24. Which is the most common type of foam proportion are used in the fire service?
Q25. The components needed to produce quality firefighting foam include: