Wikipedia
According to Paul Muchinsky in his textbook Psychology Applied to Work, "mechanical aptitude tests require a person to recognize which mechanical principle is suggested by a test item." The underlying concepts measured by these items include sounds and heat conduction, velocity, gravity, and force.
A number of tests of mechanical comprehension and mechanical aptitude have been developed and are predictive of performance in manufacturing/production and technical type jobs, for instance.
Usage examples of "mechanical aptitude".
Something like that takes understanding, a mechanical aptitude, a penchant for higher mathematics.
Baldur says you're one of the few newer Guards with any mechanical aptitude at all.
They decided to develop a strain for mechanical aptitude in England in the seventeen hundreds, I imagine.
And of course, on mechanical aptitude he usually scored a tiny fraction higher than I did—.
Of course the Morlocks had retained some mechanical aptitude, but I did not relish the prospect of being forced to negotiate with those bleached worms for the sake of a couple of bolts.
From his long experience and mechanical aptitude he knew the power plant of the hospital inside and out.