If you'd like to do the assessment without sharing your name and email with a stranger, the quiz appears to be a skin of https://monkeypuzzletraining.co.uk/free-downloads/MBI_self_a...
Interpreting the results is described here: https://monkeypuzzletraining.co.uk/burnout-inventory-results
I came across this last night in an excellent blogpost on burnout: https://mayakaczorowski.com/blogs/burnout