truck or not truck

[barba]

i’m having some problems with language. if someone knows the answer to any or all of these questions, please help out.

is a fire engine a truck?
is a big steering wheel a truck?
is an empty trailer a truck?
is a recreational vehicle a truck?
is a big car with the trunk open a truck?
is a school bus a truck?
is a 3-wheeled scooter with a load on the back a truck?
is an ice cream van a truck?
is part of a bus a truck?
is the cab of a semi a truck?
is a wheeled toy a truck?

thanks to all you mothertruckers out there.

 

[barba]

oh yeah, i forgot...

is a truck that doesn't look like a truck a truck?