The proportioning method which uses an external pump or head pressure to force foam concentrate into the fire stream is:
A) injection.
B) eduction.
C) premixing.
D) batch-mixing.

Question

Quizplus · Accepted Answer

Injection systems use an external pump or head pressure to force foam concentrate into the fire stream, allowing for precise control over the foam concentrate flow.

The Proportioning Method Which Uses an External Pump or Head