Mechanical reasoning, drawings, arithmetic and written instructions
Translate the supplied situation into a model
Mechanical aptitude questions ask how an arrangement behaves under stated simplifying conditions. Identify the effort, load, pivot, direction, contact and constraint before choosing a formula. An ideal lever balances moments, so force multiplied by its perpendicular distance to the pivot must be compared on each side. An ideal simple machine can exchange force for distance without creating energy. Real friction and deformation reduce useful performance, and a classroom mechanical advantage is not a lifting authorization.
Follow motion through the arrangement
Meshing external gears rotate in opposite directions; an idler can change direction without changing the overall ratio between the specified first and last gears. For a stated ideal non-slipping belt or gear pair, use the applicable pitch diameter or tooth-count relationship and check which shaft is input. Torque, rotational speed and power must use consistent units. A larger force arm is not the same thing as a larger resisting arm, and a steeper incline reduces neither the required ideal energy nor the load’s weight.
Read dimensions and calculate carefully
A dimensioned drawing supplies distances that may be added or subtracted along the same actual line. Do not estimate a missing length from a picture that is not to scale. Keep whole distances, center distances, offsets and radii distinct. Ratios, fractions, percentages, area, volume, rate and unit conversion appear in practical arithmetic. Write the required quantity and check the result’s unit and magnitude before comparing rounded options. A supplied example of four equal parts does not justify assuming equal spacing in an unrelated diagram.
Answer from the written passage
For a reading item, separate what the supplied instruction states from an appealing outside assumption. Identify conditions, exceptions, sequence, responsible role and stop criteria. A statement that one inspection occurs before another does not imply either can be omitted. Inference must be supported by the actual passage, not invented workplace policy. EEI CAST is a selection battery with distinct aptitude components, not a universal electrical trade license. This written preparation includes related mechanical and numerical foundations but does not claim a timed official replica, reproduce proprietary drawings or show hands-on craft competence. Verify the actual employer’s current test version and permitted aids independently; administrative details here remain unknown.