What if I take a bunch of wpm typing tests at work to make it seem like I'm always really busy?
Why do you want to cheat at work?
So that I can lie about how much I'm doing at work and how much time I'm putting into the job.
I understand that the job might be boring, but you still should not cheat and lie to your employer, it is wrong. If you get caught you will be fired on the spot. You should try to put in your best effort in doing your job honestly.
What if I am just playing a prank and I don't want to get caught?
If you're playing a prank then that's fine, but if you're using this as a way to cheat the system and get a monetary gain then that's wrong. You may even lose your job when caught.