My phlosophy for apprentices/helpers or "newbies" is that they should ask questions.
If they don't know how to do something right and safe, they have to ask!
There is no such thing as a "dumb/stupid" question, except the one that isn't asked!
Our company policy is also to sign and date our panels, switchboards, etc., and we also sign/initial the "red line" prints (as builts) so everyone knows who did what.
Yes, you can learn by watching, reading, and taking classes, but field work, and field questions are necessary.
The apprentices/helpers will be the journeymen/electricians of tommorrow!
John
