Feedforward control should be implemented with feedback control.
Answer the following statement true (T) or false (F)
True
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Technician A says that hydrogen is the fuel source for a fuel cell. Technician B says that hydrogen is an energy carrier for a fuel cell. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Which sensor measures the amount of oxygen in the exhaust?
A) ECT sensor B) IAT sensor C) MAP sensor D) O2S
Approximately how many Btus does it take to change one pound of 212 degree water into one pound of 212 degree steam?
A. 16 B. 144 C. 180 D. 970
What is the purpose of a plenum thermostat?
A) To control the zone dampers based on the plenum temperature B) To control the heating and cooling equipment to maintain the desired temperature in the supply plenum at all times C) To cycle off the heating or cooling equipment if the air gets too hot or cold in the plenum when only one or two zones are calling D) To control the plenum heat strips that prevent the supply air temperature from dropping too low