Why do people say the CM exam is hard? I got an 86 on my first try...
I kid, the CM test is crazy because of how broad it is, but you only need to get 70% right, so you can completely bomb out on some categories, and still pass.
When I took it, I didn't get even one single answer right on pneumatic controls or commercial refrigeration evaporators.
I've failed the heat pump CMS test twice though, once by 2 questions, once by 1 question.
Most/all of the test questions are taken from the RSES heat pump training manual, and I hadn't studied it, except for brushing up on some some specific things I don't have much experience with, like water source heat pumps.
Next time I take it, I'll have actually studied the the whole RSES heat pump training manual.
The "problem" with a lot of tests in the HVAC industry is that the real world answer to a lot of questions can vary by manufacturer, and often specific model, so if you haven't studied the specific source material that the questions were pulled from, your answer could be wrong, even though it is acceptable in real world applications.
If more government is the answer, then it's a really stupid question.