Aptitude tests
Mechanical Reasoning: The Category Candidates Underestimate
Levers, gears, pulleys, fluids and pressure — the small set of principles behind most mechanical reasoning questions, and how to drill them fast.
6 min read · Updated 2026-04-04
A narrow syllabus, repeated endlessly
Mechanical reasoning items recycle a short list of principles: mechanical advantage, gear direction and ratio, pulley systems, torque, centre of gravity, fluid flow and pressure, and simple electrical circuits.
Once you can state each principle in one sentence, most questions collapse into recognising which principle applies.
Drill recognition, not calculation
Timed sets punish long arithmetic. Practise identifying the principle within a few seconds, then estimating rather than solving precisely where the answer options allow it.
Log every miss by principle. Two or three principles usually account for the majority of your errors.
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Turn reading into readiness
Knowing the process is step one. Find out where you actually stand with a readiness check.