DETRAN Categoria B common mistakes
DETRAN Categoria B · Understand the traps and how to avoid them.
Treating the speed limit as the speed to drive, ignoring that the limit is a maximum for ideal conditions and that in rain, fog, or near schools the safe speed is lower.
Candidates memorize the numeric limits per road type but never learn the principle that the limit is a ceiling, not a target, so situational reduction questions catch them out.
What to do instead
For each road type, learn the limit plus the conditions that require reducing below it (rain, fog, night, school zones, curves). Practice justifying a speed choice in one sentence citing the condition, not just the number.
Confusing the meanings of similar-looking signs, for example mistaking a prohibition sign (red border, white field) for a warning sign (yellow field, black symbol), or reading a regulatory sign as merely advisory.
Candidates study sign images as a list of names without learning the shape-and-colour grammar that encodes each sign family, so unfamiliar or new signs get misclassified.
What to do instead
Learn the families first: red-bordered circles are prohibitions, blue circles are obligations, yellow diamonds or squares are warnings, white rectangles with black symbols are information. Classify any unfamiliar sign by shape and colour before guessing its meaning.
Answering penalty questions with the fine amount but omitting the points on the licence and the suspension threshold, or mixing up which infractions are grave, gravíssima, média, or leve.
The fine, the points, and the licence-suspension rules are learned as separate facts rather than as one linked table, so questions asking for the full consequence of an infraction get partial answers.
What to do instead
Build a single reference table: infraction level, points, fine range, and any multiplier or suspension effect. Recall it in rows, not columns, so any question about one infraction retrieves all its consequences together.
Describing first aid as moving the victim, giving water, or removing the helmet, instead of securing the scene, calling emergency services, and not moving the injured person unless there is immediate danger such as fire.
Candidates rely on instinct or popular myths about helping, and exam questions deliberately include plausible-sounding but harmful actions as distractors.
What to do instead
Memorize the fixed sequence: signal and secure the scene, call emergency services with location and victim count, then provide only what you are trained for. Treat any option involving moving the victim, giving fluids, or removing a motorcycle helmet as wrong unless the question states an immediate life-threatening hazard.
Ignoring the two-second following-distance rule and answering following-distance questions by feel, or applying a fixed metre figure without adjusting for speed and wet roads.
Distance is taught abstractly and candidates never convert it into a simple, testable rule, so they cannot judge options that differ by small margins.
What to do instead
Anchor on the two-second rule measured from a fixed roadside point, doubled in rain or poor visibility. For any following-distance question, compute seconds rather than metres, and reject options that describe a fixed distance regardless of speed.
Treating a roundabout or uncontrolled intersection by the wrong priority rule, for example stopping for traffic already inside a roundabout instead of yielding on entry, or claiming the larger vehicle always has priority.
Priority rules are mixed up because candidates learn them as slogans rather than as distinct scenarios, and the roundabout rule differs from the general right-of-way rule.
What to do instead
Separate the scenarios explicitly: at a roundabout, yield to vehicles already circulating; at an uncontrolled intersection, yield to the vehicle coming from the right; at a signed intersection, the sign governs. Match each question to its scenario before applying a rule.
Skipping the pre-trip walk-around and answering maintenance questions by symptom alone, so a low tyre, a worn brake pad, or a burnt-out light is only noticed after it causes a failure.
Preventive checks feel optional and are not practised, so candidates cannot connect a specific check to the fault it prevents.
What to do instead
Learn a fixed checklist in order: tyres including the spare and pressure when cold, lights and indicators, brakes, fluids, wipers, and mirrors. For each maintenance question, identify which checklist item would have caught the fault before it occurred.
Answering environmental and citizenship questions with generic statements about pollution instead of concrete behaviours such as not idling the engine unnecessarily, correct disposal of tyres and oil, and noise limits near hospitals.
The domain feels like common sense, so candidates do not study it, but the exam tests specific rules including noise and emission limits and the duty to other road users.
What to do instead
Prepare a short list of concrete behaviours with their rationale: engine off when stationary, proper disposal of oil and tyres, no horn near hospitals and at night, respect for cyclists and pedestrians. Tie each behaviour to the specific rule or harm it addresses.
Reading the scenario once and answering from the first plausible option, missing qualifiers such as 'except', 'always', 'never', or 'in this situation' that reverse the correct answer.
Time pressure and question length encourage pattern matching on keywords rather than full reading, and the exam uses absolutes as traps.
What to do instead
Underline or note the qualifier before choosing. Reject options containing absolutes unless the rule itself is absolute, and restate the question in your own words in one line before selecting an answer.
Confusing the administrative process stages, for example treating the notification of the infraction as the same as the penalty being imposed, or missing the deadlines for defence and appeal.
The procedural steps are studied as a list of names without their order or purpose, so questions about what happens next or which deadline applies are answered by guesswork.
What to do instead
Draw the sequence once: infraction detected, notification issued, deadline for defence or indication of the driver, analysis, penalty imposed, appeal to the authority and then to the council. Attach each deadline to its step and answer process questions by locating the scenario on that timeline.