It is impossible to take the exam without following the rules, but everyone knows about domestic affairs. You can get a college diploma through some channels without taking the exam, and you can certainly get a fireman's license without taking the exam. Anything is possible if you don't take the usual path.
How to operate: first "invite the teacher to dinner" and first "give the teacher three or five hundred dollars", and your expectations will be met.
Although I said so, my certificate was tested. It doesn't need much technology to burn a boiler, and the books you learn are not very important, but one thing is the most important, especially to operate a steam boiler. You don't have to take the exam, but you must pay attention to this position, know the harmfulness of boiler accidents, and don't be careless about Jingzhou.