Module overview
What the test trains
This module focuses on mechanical comprehension and reading a diagram accurately before calculating. It is designed to make the underlying process easier to recognise, repeat and review before you add more speed or workload.
Task profile
What the task looks like
What it involves
- Read a rendered diagram — a gear train, pulley system, lever, balance scale, hydraulic cylinder, belt drive, or pipe.
- Work out the requested outcome: rotation direction, speed ratio, mechanical advantage, equilibrium, force multiplication, or flow behaviour.
- Apply the relevant mechanical principle to the specific values shown in the diagram.
- Select the correct answer, with more gears or a wider range of values at higher difficulty.
Interface briefing
Controls and difficulty
Controls
Read the diagram shown and choose the matching answer using the keyboard or a click.
Difficulty and settings
Gear-train complexity grows from 2 to 4 gears, and the pool of tooth-count, lever-arm and balance values widens, with a third pulley-segment option appearing at Hard.
Read how practice scores and estimates work →Training plan
Build a method that holds up under pressure
Why this becomes difficult
- A misread diagram produces a wrong answer even with correct mechanical reasoning.
- Direction-propagation through a gear train is easy to lose track of past two or three gears.
- Different task types each use a different underlying principle, so no single formula covers all of them.
- More gears and a wider range of values at higher difficulty leave less room to recover from a small counting error.
Preparation tips
- Read the diagram methodically before calculating — count teeth, segments, or arm lengths deliberately rather than estimating by eye.
- For gear trains, track direction one mesh at a time rather than judging the whole chain at once.
- Keep the small set of core relationships (mechanical advantage = load ÷ effort, alternating gear direction, pulley segment counting) fluent.
- Double-check which value the question is actually asking for — direction, ratio, or force — before committing to an answer.
Common mistakes
- Miscounting gears, teeth, or supporting pulley segments from the diagram.
- Losing track of direction partway through a longer gear chain.
- Applying the wrong principle to a task type (for example, treating a lever problem like a pulley problem).
- Rushing the diagram read and going straight to calculation.
Useful practice drills
- Practise each task type (gears, pulleys, levers, hydraulics, belts, flow) separately before mixing them.
- Drill gear-direction propagation specifically, since longer chains are the most common source of errors.
- Use the per-task-type accuracy breakdown to identify which mechanical principle needs the most review.
- Re-derive mechanical advantage from first principles occasionally rather than relying purely on pattern memory.
Transparency
Sources and information status
Task guidance on this page describes CBAT Academy’s own software. Broad aptitude context is checked against the public references in the source register.
This guide describes CBAT Academy’s independently developed practice modules. It is not an exact specification of ADAPT, COMPASS, Aon’s Aviation Suite (cut-e), PILAPT or any other provider’s proprietary assessment. Official content, timings, scoring and administration may differ.
Continue the briefing
Turn the method into repeatable performance.
Launch the interactive trainer, begin with accuracy and review the pattern behind each mistake before increasing pace.