Okay so I've been lurking here for months and figured I'd finally post now that I have some good news. I work in industrial maintenance and my company pushed us to get CBT I certified before the end of Q2. Failed my first attempt back in February by four points — honestly devastating after putting in about three weeks of studying. The combustion theory section absolutely wrecked me.
What changed the second time around was finding a decent CBT I practice test that actually matched the format of the real thing. I drilled those for two weeks straight, timed, no open book. Scored a 78 on my retake. The study guide I used the first time was way too surface-level — if you're prepping, make sure whatever material you use covers burner management systems and safety controls in real depth, not just definitions.
Happy to answer questions about specific topics or share my timeline. What are you all currently struggling with?