DogHouseMom...
I feel your pain!!! However, my husband isn't even close to being an engineer, just a plain old retired fart, and I either get 5 million questions, or the blank "deer in the headlights" look. I've come to the conclusion that I'll just do the "whatever it is" myself and if I do need his help, I'll make sure I'm to a point of no turning back, before I ask. Fortunately, I know where all his tools are and I know how to use them...I usually only need his for the physical labor aspect.
Just keep the positive attitude, as they (husbands) do tend to grate on the nerves every now and again!