AFCT common mistakes
AFCT · Understand the traps and how to avoid them.
Choosing a word-knowledge answer that merely sounds related to the target word instead of substituting each option back into a sentence to test the meaning.
Under time pressure, candidates match on vague association or word shape rather than on precise definition, and near-synonyms in the options create a false sense of fit.
What to do instead
Silently build a short sentence using the target word, then swap each option into that sentence and keep only the one that preserves the meaning; eliminate options whose connotation or part of speech is off.
Answering a paragraph-comprehension main-idea question with a detail, example, or number that appears in the passage.
Details are concrete and easy to locate, so they feel safe, while the main idea requires synthesizing the whole paragraph.
What to do instead
Before reading options, state the point of the paragraph in one self-written sentence; then pick the option closest to that sentence and reject any option that covers only part of the passage.
Solving arithmetic word problems by grabbing the two visible numbers and applying an operation without first writing down what is being asked.
Word problems bury the operation in language, and candidates pattern-match on keywords like 'total' or 'left' instead of modeling the situation.
What to do instead
Restate the question in your own words, list the given quantities with units, and decide the operation from the relationship before computing; check the answer's units and rough size against the story.
Applying a formula from memory without checking that the problem's conditions match it, such as using area of a circle when diameter, not radius, is given.
Formula recall is emphasized in study, so candidates plug in numbers reflexively and skip the condition check.
What to do instead
Write the formula, then label each variable with its value and unit before substituting; convert diameter to radius, percent to decimal, and mixed units first, then compute.
Answering general-science items by everyday intuition rather than by the underlying principle, for example assuming heavier objects always fall faster.
Casual observation and familiar sayings conflict with scientific models, and candidates trust the familiar pattern.
What to do instead
For each science item, name the principle involved (gravity, conservation of energy, density) and test each option against that principle rather than against personal experience.
Treating current, voltage, and resistance as interchangeable when reasoning about a circuit change.
The three quantities are described with similar language, and candidates memorize the formula triangle without tracking which quantity is fixed.
What to do instead
For each problem, write which quantity is held constant, then apply Ohm's law symbolically to see whether current rises or falls before substituting numbers.
Confusing the function of neighboring automotive or shop components, such as mixing up the alternator with the starter or a ratchet with a torque wrench.
Component names and roles are learned as a list, so similar-sounding parts blur together without a mental picture of the system.
What to do instead
Build a simple system diagram for each area (charging, starting, ignition; measuring, cutting, fastening) and place each component by what it converts or does in that flow.
Ignoring mechanical advantage and assuming a pulley or lever changes the total work or energy required.
Candidates conflate reduced force with reduced work, forgetting that distance or speed changes to compensate.
What to do instead
For every simple machine, count the supporting rope segments or measure lever arms to get the force ratio, then confirm that force times distance stays constant.
Spending a fixed amount of time on every question regardless of difficulty, leaving easy items at the end unanswered.
Candidates treat the test as a strict sequence and fear skipping a question they might later solve.
What to do instead
Do a first pass answering only items solvable in under a minute, mark the rest, and return with remaining time; never leave a blank, since an eliminated-guess beats an empty response.
Changing a correct first answer because a later option 'looks more sophisticated' or because of second-guessing after re-reading.
Re-reading without new information increases doubt, and complex-sounding distractors feel more authoritative than plain correct answers.
What to do instead
Only change an answer when you can state a concrete reason the original is wrong (a misread word, a units error); otherwise lock in the first reasoned choice and move on.