Technician A says that used oil should be collected for recycling. Technician B says that used oil filters may be disposed of as regular solid waste only after an approved draining process. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
C
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____ backflow is a reversal of normal flow in a system caused by a negative pressure (vacuum) in the potable water supply.
a. Gravity b. Back-siphonage c. Back-pressure d. none of the above
Which of the following is NOT a sensor in an ATC system?
A) Passenger sensor B) Sun load sensor C) Ambient air temperature sensor D) In-car temperature sensor
What is the reason for advancing injection timing as engine speed increases?
A. real time available for combustion decreases B. real time available for combustion increases C. less air in engine cylinder D. more air in engine cylinder
An optional item of equipment used to recover about 60 to 80 percent of the energy contained in the air
exiting a system and to deliver the energy to the incoming air is a(n) _____. a. ERV/HRV b. evaporative pre-cooler c. bypass humidifier d. economizer