It's been too long since I took the test, I don't remember being in a big hurry/ rushed for time. A co- worker at the time when I got mine, asked how many tennis balls I had knocked off- "because it looked like wimbeldon out there when I got done- I sent tennis balls everywhere!"
He passed after sending tennis balls everywhere, so I knew I had passed, so I would think if you're halfway careful, you should do fine. Provided you know how to run a crane. If you don't, practice a lot.
I was already a operator for a few years when I got mine, so it wasn't a big deal. I felt bad because a lot of the guys in the hall that took and passed it, really didn't know how to run a crane, and I know they got sent out to jobs as a "certified" operator, and that doesn't help anyone out, the operator is inexperienced, and the hiring outfit is upset because they're not getting quality employees.
I don't know the particular run down of points loss, if you're worried that much about your skills/ or get nervous and have troubles with it, the only thing that makes you better is more experience.
I find if I shoot for perfect, I've got some margin for error. If you go into some test thinking "I can drop 25 points and still pass" I think you're setting yourself up to fail.