Angola Air Force Academy Entrance Exam common mistakes
Angola Air Force Academy Entrance Exam · Understand the traps and how to avoid them.
In trigonometry, substitutes side lengths into the sine rule or cosine rule without first identifying whether the triangle is right-angled, which angle is included between two sides, or whether the knowns are side-side-angle.
Formulas are memorised as text strings rather than as conditional tools, so the candidate pattern-matches numbers to a formula and ignores its geometric preconditions.
What to do instead
Before calculating, draw and label the triangle, list the knowns and the required unknown, and write one sentence stating why the chosen rule applies. After solving, check with the angle-sum property or the sine-rule ratio.
Rounds intermediate results to one or two decimal places in multi-step algebra or statistics problems, then uses the rounded value in later steps and reports an answer that is outside tolerance.
Candidates treat each line as a final answer, and they confuse readability with numerical precision, often because earlier school exercises rewarded tidy numbers.
What to do instead
Carry full calculator precision through intermediate steps, store values in memory, and round only the final result to the precision requested. Write the unrounded value beside the final line for checking.
In mechanics and fluids problems, mixes km/h with m/s, g/cm³ with kg/m³, or leaves g as 9.8 while using centimetres, then substitutes directly into a formula.
The candidate starts from the formula and hunts for numbers, rather than starting from the physical quantities and their units; unit conversion feels like an optional preliminary.
What to do instead
Begin every solution with a conversion line converting all given quantities to SI units, write the unit beside every substituted number, and finish with a dimensional check of the answer.
In reading comprehension, selects the option that matches personal opinion, general knowledge, or the topic of the passage rather than the option supported by a specific sentence in the text.
Under time pressure, candidates skim for familiar words and answer from memory or plausibility; they do not distinguish what the text says from what they believe.
What to do instead
Annotate the passage, and for each selected option underline the exact sentence that supports it. Reject any option for which no textual anchor can be pointed to, even if it sounds true.
In the composition task, starts writing immediately with no plan, produces either a very short text or a rambling one, and uses the same informal register throughout, including abbreviations and spoken-language connectives.
Candidates confuse fluency with speed and have not internalised the plan-draft-revise cycle; formal register has not been practised as a separate skill.
What to do instead
Spend three to four minutes on a skeleton plan: thesis, two or three supporting paragraphs, conclusion. Write in complete sentences, reserve five minutes to check agreement, punctuation, and register, and practise timed compositions under exam conditions.
In stoichiometry, balances an equation by changing subscripts inside chemical formulas, for example turning H₂O into H₂O₂, instead of adjusting coefficients in front of the formulas.
The candidate treats the equation as an arithmetic puzzle and does not securely hold the principle that a formula identifies a substance and cannot be altered during balancing.
What to do instead
Adopt a fixed rule: subscripts are untouchable, only coefficients change. Balance by a coefficient table, count each element on both sides after every change, and then extract the mole ratio for the calculation.
In English, translates word by word from Portuguese, producing errors such as 'I have 20 years', wrong prepositions, and false friends, and answers vocabulary items from the first dictionary meaning that comes to mind.
First-language transfer and limited exposure to whole phrases mean the candidate assembles sentences from single-word equivalents rather than from memorised collocations.
What to do instead
Learn vocabulary in phrases and example sentences, keep a personal list of false friends and preposition collocations, and drill tense choice with timelines. In the exam, read the whole sentence before choosing a meaning.
In Angolan history and geography, recites isolated dates such as 1961, 1975, and 1991–2002 without linking them to events, and cannot locate provinces or rivers on an outline map.
Facts were memorised as separate items for short-term recall, without a causal timeline or a spatial frame to attach them to.
What to do instead
Build a single annotated timeline linking cause and consequence, and practise labelling a blank map of Angola repeatedly from memory, checking against a reference map each time.
In rotation and reflection items, mentally rotates the whole figure but ignores handedness, so a mirror image is accepted as a valid rotation; in series problems, the candidate guesses the next figure without testing the rule against all given terms.
The candidate relies on a global visual impression rather than tracking a distinctive asymmetric feature, and does not verify a hypothesised rule against every example.
What to do instead
Choose one asymmetric landmark, such as a notch or a shaded corner, and track only its position and orientation. State the rule in words and test it on every given figure before selecting an answer.
On physical test day, arrives dehydrated or having skipped breakfast, and sprints the first stage of the shuttle run or the first lap of the endurance test, then fails to complete later stages.
Candidates treat each test as a maximum-effort event, have not rehearsed pacing, and may follow anxiety-driven nutritional advice rather than a tested routine.
What to do instead
Rehearse the full test protocol two to three times in the preceding weeks, using the same warm-up, hydration, and meal timing. Learn a target pace for endurance items and practise negative splitting so energy remains for the final stages.