Carbon Cycle Chemical Reactions Involved: Photosynthesis: Air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a by product. During photosynthesis plants use carbon dioxide and produce oxygen.
Similar to shore power for ships, a ground power unit (GPU) may be used to supply electric power for an aircraft on the ground, to sustain interior lighting, ventilation and other requirements before starting of the main engines or the aircraft auxiliary power unit (APU).
Power cycles on and off to the fuel pump when you first turn the key to on to pressurise the fuel rail. You should hear it. The fuel pump relay is the one on the right side of the battery tray. The ground is located near the parking brake release, just look for the wire color.