Substance or compound whose molecules dissociate into charged components when placed in water is an:

High-expansion foam is typically used for:

A. wildland and brush fires. B. rolling on to liquid fuel fires. C. suppressing vapors from hazardous materials spills. D. confined spaces such as mines and shipboard compartments.

Firefighters should make use of a ____________ to denote a change in temperature during the process of the oxide crust development on combustible metals, because even though there may not be signs of external combustion, the metal can still be extremely hot

a. hose line b. Class D fire extinguisher c. thermal imaging camera d. positive-pressure, self-contained breathing apparatus (SCBA)