He never attended college but had strong mechanical aptitude and mathematical skills.
He seemed to lack mechanical aptitude, at least as a child.
After all, she wasn't particularly intelligent, and her mechanical aptitude was laughable.
He has natural mechanical aptitude and an excellent grasp of fundamentals.
"The biggest attribute we look for in a new customer isn't past experience but a little bit of mechanical aptitude," he said.
From his long experience and mechanical aptitude he knew the power plant of the hospital inside and out.
Howard likely has the most hands-on and mechanical aptitude of the four as well.
In the ordinary course of things this would be all wrong, for George had less mechanical aptitude than any man ever born.
A few of our people have some mechanical aptitude, but no one's really got a look yet.
As a young man, Quentin displayed a natural mechanical aptitude.