I am guessing you are playing a modpack. This device saves a x amount of chuncks in the area around the chunckloader. So a device such as a pump or quarry will continue to operate even if you are not in the chunk or world. These will not work offline unless you are on a server and its on.
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If your x and z coordinates are both multiples of 16, you are standing on the corner of a chunk.
Probably a HUGE chunk of lava. Or glitch.
you have to downlaod a mod seach for a mod loader and the mod its self
All you have to do is delete your .minecraft folder and run Minecraft agian. It will make a new one, then try installing it agian.
No. I use that mod and I don't have mod loader.