Can't really tell the question, but is it just asking you to draw cross-sections? If so and you can't do this in 5 minutes engineering probably isn't for you.
Not to say you're not smart, but engineering is alot more visual than people think. You need to be able to orient things easily in your brain. You'll struggle with alot of concepts if you can't visualize stuff well.
I've seen kids who killed me in calculus struggle with simple statics and dynamics problems because they couldn't visualize the problem.
I took that class at LSU back in 2004, my first year. I remember sucking at the drawings, especially the isometric ones that we had it do. My average was around an 88 going into the final project, but the professor helped us a lot on it and I ended up getting an A. After my first year I realized ME. Wasn't for me and wanted to do something easier so I switched to electrical and computer engineering.