PCATP ALE common mistakes
PCATP ALE · Understand the traps and how to avoid them.
Treating the site-planning question as a pure design-composition exercise and answering with a sketch-like layout, without checking setbacks, FAR/plot ratio, ground coverage, or parking counts against the byelaws stated in the question stem.
Candidates carry studio habits into the paper: they respond to the 'design' word and produce a pleasing massing, forgetting that the exam marks measurable compliance. Regulatory numbers in the stem are usually the actual test.
What to do instead
Before answering any site-planning item, extract the numeric constraints (plot area, road width, setbacks, permissible FAR, coverage, parking norms) into a short checklist and verify the proposed scheme against each one. If a constraint is not stated, say which byelaw assumption you are making rather than leaving it implicit.
Drawing construction details at a uniform line weight with no annotation of material, thickness, or sequence, so a wall-section answer cannot be distinguished from a concept sketch.
Candidates revise from textbooks and remember the shape of a detail but not its build-up; under time pressure they draw the outline and skip the layers, damp-proof course, and fixings that carry the marks.
What to do instead
Practise producing annotated sections from memory (roof parapet, basement retaining wall, toilet wet area, window head and sill) with every layer labelled in order and a note on the sequence of construction. In the exam, label first and draw second so nothing is left unlabelled.
Choosing a structural system or member size by intuition ('RCC frame is standard') without checking span-to-depth ratios, load path continuity, or the effect of the stated soil bearing capacity.
Non-engineer candidates learn structures qualitatively and avoid numbers; the exam, however, tests whether the candidate can sanity-check a scheme against approximate rules of thumb and stated loads.
What to do instead
Memorise and rehearse a small set of approximate checks (slab span/depth, beam depth as a fraction of span, footing area from load over safe bearing capacity, cantilever limits) and apply them explicitly in the answer, showing the arithmetic so partial credit is visible even if the final figure is off.
Answering services questions with a single generic sentence ('provide adequate ventilation and lighting') instead of sizing or locating the system: no duct shaft dimensions, no number of lifts, no tank capacity, no riser routing.
Services are perceived as the engineer's job, so candidates revise them last and answer at the level of principle. Markers are looking for quantities, locations, and coordination with structure.
What to do instead
Build a one-page revision sheet of typical figures and rules (shaft sizes, lift count versus population and waiting interval, water demand per occupant, tank storage as a fraction of daily demand, slope of drainage runs, riser locations) and practise inserting them into design answers with a short justification.
Treating sustainability as a list of add-on gadgets (solar panels, rainwater harvesting) without linking passive strategy to the stated climate, orientation, and building form.
Candidates memorise certification checklists and green-technology vocabulary, which is easy to recall, but the exam typically gives a climate zone and orientation and asks for the design response, which requires reasoning rather than recall.
What to do instead
For each major climate type, rehearse a passive-design response tied to orientation, shading, thermal mass, courtyard or stack ventilation, and envelope. In answers, state the climate logic first, then the technology, and explain why the measure suits that specific condition.
Mixing up the roles and liabilities of the parties in a practice scenario: answering a question about the architect's duty by describing the contractor's obligation, or confusing the client's authority with the architect's.
Candidates study the conditions of engagement and the standard forms of contract as isolated documents and never map them onto a single project narrative, so the boundaries blur under exam pressure.
What to do instead
Draw one timeline of a notional project from appointment to defects liability and place each party's duties, approvals, and liabilities on it. Answer scenario questions by naming the party, the clause or instrument that creates the duty, and the consequence of breach.
Answering an ethics question by describing what would be commercially convenient or by staying silent on a conflict of interest, instead of identifying the duty owed and to whom.
Candidates without practice experience answer ethics items as opinion questions; they do not realise the expected answer is a reasoned application of professional-conduct duties (competence, disclosure, honesty, public safety).
What to do instead
Use a fixed three-step structure for every ethics scenario: identify the duty and the party to whom it is owed, identify the conflict or risk, then state the disclosure or refusal required. Practise on scenarios involving gifts, unpaid fees, unsafe instructions, and undisclosed interest.
Designing an urban or housing layout as a collection of individual buildings, without testing the street network, block hierarchy, density, plot subdivision, or the relationship between public and private space.
Candidates trained in building design scale up their usual approach; they produce attractive clusters but no legible movement hierarchy or density calculation, which is what urban-design questions reward.
What to do instead
Answer urban and housing questions in layers: movement hierarchy, block and plot structure, density and unit mix, open-space hierarchy, and then building typology. Always compute or state the density and unit count implied by the layout so the proposal is verifiable.
Producing a programme or cost answer with a bar chart but no critical path, no float, and no identification of which activity drives the completion date or the cash flow.
Candidates learn project-management vocabulary but rarely work a network through by hand; they substitute a Gantt-style list for the logic the question is testing.
What to do instead
Rehearse small network problems by hand until forward pass, backward pass, float, and critical path are automatic. In written answers, state the critical path explicitly and tie cost or time consequences to it rather than describing activities in sequence.
Quoting a contract clause, fee percentage, or measurement rule from memory without stating which standard form or method of measurement it comes from, so the answer is unverifiable and often wrong.
Candidates revise from summaries that strip out the source document; they remember a number but not the instrument, edition, or context that gives it meaning.
What to do instead
Learn each contractual or costing rule attached to its source (which standard form, which edition, which measurement method, which clause) and cite the source in the answer. Where the question does not specify the form, state the assumption and answer within it.