Vehicles that run on pure ____________________ are true zero-emission vehicles.
Fill in the blank(s) with the appropriate word(s).
hydrogen
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What prevents cold air from being circulated to the heated space during the defrost cycle?
A. The auxiliary heater turns on to "temper" the air. B. All of the dampers close automatically. C. The indoor fan motor turns off. D. Both a and b are correct.
VAV systems are capable of controlling indoor air quality (IAQ) at the zone level by employing a control
strategy called _____. a. demand-controlled ventilation b. optimized ventilation control c. pre-occupancy purge d. baseline ventilation control
All of the following are key components to a water shuttle operation except:
A. water tankers. B. attack apparatus at the fire. C. fill apparatus at the fill site. D. water tenders.
Technician A says that the sharp edges of spool valves should be rounded using 400 grit sandpaper. Technician B says that all valve body parts should be cleaned and then dried using low- pressure, filtered compressed air. Which technician is correct?
A. Technician A B. Technician B C. Both technicians D. Neither technician