Some - but not all - do. Rear loaders and front loaders typically don't; barrel loaders and side loaders set up to load on the curb side typically will.
So that the drivers can place mail into mailboxes without having to exit the vehicle.
no
right
Because the Americans are never right.
The US Postal Service delivery trucks DO have their steering wheels on the right-hand side of the vehicle. It's GOT to be the cost of shipping! Lately, in Southern California, probably due to the popularity of "drift-car driving", I AM seeing privately-owned cars with steering wheels on the right. Next time I'm "cruisin' the boulevard" and see one, I'll be sure to ask.
If the wheels turns to the right by itself with the engine running the steering gear or rack and pinion has failed.
When a power steering wheel is turned to the right, the power steering system assists in directing the vehicle's wheels to the right. This is achieved through hydraulic or electric mechanisms that reduce the steering effort required by the driver. The front wheels pivot right, allowing the vehicle to change direction smoothly. This action helps improve maneuverability, especially at lower speeds.
Yes that is correct
With the wheels pointed straight ahead and engine running (assuming it has power steering), you measure the amount of travel at the outer diameter of the steering wheel from left to right without moving the wheels.
The front wheels being moved by the steering wheels rotation. The direction that the wheels are pointing denote the direction that the car is travelling.
Steering wheel placement aims to put the driver closer to the middle of the road. Some countries decided differently WRT which side of the road to drive on. Cars made to be used in right-side-traffic have the steering wheels to the left, while cars made to be used in left side traffic have the steering wheel to the right.
Driving is on the left-hand side of the road with steering wheels on the right.