No, water should not be put in a tire as it can cause damage to the tire and affect its performance.
When they were repairing it they probably pushed a plug through your tire accidentally and left it, then put in another plug correctly to seal your tire.
No
What ever your wallet will allow.
http://www.tractorsmart.com/Farm_Tractor_Liquid_Tire_Ballast.htm will tell you how much water to put in your tire. It varies depending on tire size--a 30-horse Mahindra is going to take very much less water than a 500-horse John Deere.
NO. Your bladder tube is way too small for this to ever happen.
The amount of water you put in a tractor tire varies based on the tire size and the intended purpose. Typically, a tire can be filled with water to about 75% of its total volume for ballast to improve traction and stability. It's important to check the manufacturer's guidelines for specific recommendations and ensure that the tire can handle the additional weight without damage. Always use a mixture of water and antifreeze in colder climates to prevent freezing.
This is to locate the leak and any others that tire may have. The leaks will bubble under water and make it easy to spot.
No, it is not recommended to put a tube in a tubeless tire as it can cause safety issues and affect the performance of the tire.
The inside volume of the tire has not changed, so the pressure will not change.
NO
No, it is not recommended to put tubes in a tubeless tire for a vehicle.
Move the vehicle until the valve stem is on the top and air it up normally.