If you are seated in the drivers seat of the vehicle in question AND - the key is in the ignition - or on your person - or within your reach - regardless of whether the vehicle's engine is running or not, you are considered to be "in control" of the vehicle and therefore "operating" it.
No
Depends where, but in most situations it is considered a civil and a criminal offence.
Vehicle operating space is the area around the vehicle that cannot be seen from the driver's seat.
perform a chemical test.
A pre-trip inspection of the vehicle would be a good thing.
It means the vehicle is operating like it should.
No, if you are a passenger or are not actually in control of the vehicle. HOWEVER - if you are sitting behind the steering wheel of a vehicle - even though it is stopped, parked, or otherwise not in motion - you would be considered "in control" of the vehicle and you COULD be charged.
In the legal sense, no. Unix is an operating system and has the components of an NOS (Network Operating System) but it not considered just a network operating system.
A Dirt Bike is considered a vehicle.
It depends, is it and F-550 or F-650? If it is one of those, then yes. But if it is and F-450, I do not know, because it is sold to the public, while the 550 and 650 are only sold to people who need them. In CA any size tow truck would be considered a commercial vehicle. In CA any size truck with an open bed (meaning no camper-shell) is considered a commercial vehicle. This means whether a company or individual is operating the truck it is considered a commercial vehicle.
If you are sitting behind the wheel of a running vehicle you are considered to be 'in control' of that vehicle whether or not anyone ovserved you drive it or move it. You will be charged with "Operating While On Suspension."
Any motorized vehicle can be dangerous and unsafe, the key is to respect the vehicle in which you are operating. The rider should be familiar in the operation of the 4 wheeler and if it is purchased for a younger person they should at all times be supervised.