Which of the following types of proportioners consists of two positive-displacement rotary-gear pumps that are mounted on a common shaft with one pump for water and the other for foam concentrate?
A. Balanced pressure proportioner
B. Pressure proportioning tank system
C. Around-the-pump proportioner
D. Coupled water motor-pump proportioner
Answer: D. Coupled water motor-pump proportioner
Health Professions
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Fill in the blank(s) with correct word
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