YES! Brake fluid is pretty nasty stuff. It'll eat up paint, if spilled, etc. I'd leave it to the brake reservoir only.
HOWEVER, you CAN substitute Automatic Transmission Fluid for Power Steering fluid. Top off if in an emergency if you need to, but if you're gonna use ATF permanently, I'd flush out the power steering system first and refill with ATF so they dont mix...
No, they are not compatible and it will cause damage.
Yes, adding brake fund to a P/S system can cause damage.
If your power steering pump is not working as well as it used to.
Yes very bad news it damages the seals in the brake system causing them to swell up your looking at a very costly stupid preventable mistake.
There is no substitute available that can be used for brake fluid. Using anything other than brake fluid could be dangerous and would likely cause damage.
No. Brake fluid is not a petroleum product. Power steering fluid is. Petroleum product will swell and ruin rubber part's brake system is full of rubber parts. You will destroy your brake system using power steering fluid.
No !
No!
Yes. It will cause the seals to swell up in the master cylinder. This will cause a loss of braking. You need to remove the fluid and flush out the master cylinder(with clean brake fluid) immediatly.
Mixing hydraulic fluid types will damage the seals in the steering system and cause them to leak.
Your power steering will fail because brake fluid is poor lubricant.
NO! Dont mix them and dont swap them; they are very different and will cause massive damage.