?Perhaps they are asking if the vehicle is propelled with the electric motors under like, say, 50 MPH, instead of running on the gasoline/E85 engine?
I believe the current hybrids alternate electric power/fuel power depending on the load the PCM detects the driver wants. What I mean is, the car will have the electric motors as the default to move the car, and the fuel engine as a supplement when additonal electricty is needed. That's what I noticed in a Prius that I test drove some time ago. The display indicated the electrical enery was constantly propelling the vehicle and only supplemented by the fuel engine when the electrical supply was deminished.
"...What IS true: We anticipated that this would happen - we are never finished - and yes, Ford DOES deserve to win now and then. To think that GM can come out with a car to make ford throw in the towel is simply foolhardy..." - fbodfather