Which of the following types of foam proportioners consists of one or two foam concentrate tanks that connect to both water supply and foam solution lines of the overall system?
A. Duplicate pressure system
B. Balanced pressure proportioner
C. Pressure proportioning tank system
D. Coupled water motor-pump proportioner
C
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Hair cell receptors for hearing are located inside the:
a. Organ of Corti within the cochlea b. Utricle and saccule c. Middle ear cavity d. Semicircular canals
On arrival at a vehicle collision, you observe a small fire in the engine compartment. A bystander is attempting to smother the fire with a jacket as you approach with an A-B-C extinguisher from your ambulance. Which of the following is the BEST method of extinguishing the fire?
A) Close the hood to contain the fire within the engine compartment. B) Aim at the base of the fire and use short bursts until the fire is out. C) Aim the nozzle to the side of the fire and, with a sweeping motion, push the fire at its base. D) Sweep the nozzle of the extinguisher left and right using short bursts until you are out of extinguishing agent.