EEI CAST common mistakes
EEI CAST · Understand the traps and how to avoid them.
Applying a model without its stated units and assumptions.
A correct classroom relationship does not establish all operating conditions, safety controls or real-world competence.
What to do instead
Identify the actual quantity, convention, units and applicability before substituting values.
Treating written recognition as authorization for real equipment work.
A correct classroom relationship does not establish all operating conditions, safety controls or real-world competence.
What to do instead
Keep the conceptual exercise separate from qualified authorized procedures and practical assessment.
Estimating a missing distance from a sketch marked not to scale.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Use the supplied complete dimensions and stated geometric relationships.
Multiplying an idler tooth count into the end ratio without cancelling it.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Follow both meshes and distinguish a simple idler from a compound shaft.
Claiming a lever creates energy because effort force is smaller.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Compare the associated movement distances and ideal work balance.
Adding a convenient outside rule to a reading passage.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Choose the conclusion actually supported by the passage and its conditions.
Using a force magnitude where the perpendicular component is required.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Identify the force line of action and the correct moment arm.
Forgetting to square or cube a length conversion for area or volume.
The stated distinction changes the supported calculation or inference; a familiar label does not replace the actual model and evidence.
What to do instead
Apply the dimensional conversion consistently and check the result’s units.