Categories, Endorsements and Card Boundaries
The one-test-per-category rule, endorsement coverage and the limits of Red and Blue card evidence.
How to prepare for a CPCS category Theory Test
Learn the operator's safe decision sequence, connect it to the current category learning outcomes and practise explaining why the manufacturer, task and site controls apply.
Core concepts
Concept 1
The March 2026 catalogue lists 62 current category codes across machine and associated-role families.
Exam cue: Read category code, endorsement and additional-award columns separately.
Concept 2
One Theory Test applies across a category's endorsements, while practical testing is endorsement-specific.
Exam cue: Confirm the current catalogue because legacy revision pages may remain online.
Concept 3
Adding a further endorsement to a held category does not require another Theory Test; adding a new category does.
Risk pitfalls and guardrails
Creating a separate tracker product for every category or endorsement.
Guardrail: Keep category theory, endorsement practical and card evidence as separate scheme facts.
Assuming an additional-category award makes every endorsement interchangeable.
Guardrail: Keep category theory, endorsement practical and card evidence as separate scheme facts.
Memory anchors
One Category, One Theory
A category theory result covers that category's endorsements.
Practical Proves Endorsement
The practical test is taken for the required endorsement.
New Category, New Theory
A different category normally requires its own theory achievement.
Card Is Evidence
A card records scheme achievement; it is not a universal site authorisation.
Catalogue Beats Memory
Use the current category information, not an obsolete code list.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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