I did some research regarding your question and the type of shut off valve you presumably have installed is called a ball o stop. these types of shut off valves are turned off by turning the handle a quarter turn
see manufacturer website below and email them directly with further assistance
Normally yes, so long as the pan does not have a plastic handle.
If you have to hold the toilet handle down to flush, you need to press and hold the handle until the toilet flushes completely.
The handle is made out of plastic.
Because most people are right-handed, so when they are facing it, it will be on the side of the hand they normally use.
The purpose of the toilet handle arm is to lift the flapper or flush valve inside the toilet tank, allowing water to flow from the tank into the toilet bowl to flush waste down the drain. When the toilet handle is pressed, it pulls on the handle arm, which in turn lifts the flapper or flush valve, releasing water into the bowl for flushing.
The purpose of the toilet chain in a typical bathroom setup is to connect the toilet handle to the flapper valve, allowing the user to flush the toilet by pulling the handle.
There is about four to five gallons wasted if you flush a toilet but I don't believe that it makes a difference if the handle is loose or not. Unless, the toilet is leaking from the handle or somewhere else.
To tighten a loose toilet handle nut, use an adjustable wrench or pliers to securely tighten the nut clockwise until it is snug. Be careful not to overtighten to avoid damaging the handle or the toilet.
If a toilet handle breaks off there are many places to buy cheap handles that will fit the toilet in need. One store is Lowe's which has handles for many popular brands of toilets.
To replace a toilet tank handle, first turn off the water supply to the toilet. Remove the old handle by unscrewing the nut inside the tank. Install the new handle by attaching it to the nut and tightening it securely. Turn the water supply back on and test the handle to ensure it flushes properly.
To replace a Mansfield toilet handle, first turn off the water supply to the toilet. Remove the tank lid and disconnect the old handle from the flush rod. Install the new handle by attaching it to the flush rod and securing it in place. Turn the water supply back on and test the new handle to ensure it flushes properly.
Because the plastic handle act as a thermal insulator, to avoid burns on your skin.