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The PRF exam is Brazil's premier federal highway law enforcement competition administered by Cebraspe. Candidates must master Brazilian Traffic Law (CTB & CONTRAN), Criminal/Procedural Law, Public Law & Human Rights, Accident Physics, Portuguese, and Geopolitics across a 4.5-hour sitting, followed by physical fitness tests and academy training at UniPRF.
Sample PRF Practice Questions
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1Under Article 20 of the Brazilian Traffic Code (CTB - Lei nº 9.503/1997), which of the following competencies is specifically attributed to the Federal Highway Police (Polícia Rodoviária Federal - PRF) within the scope of federal highways and roads?
A.Conduct ostensible patrol, perform traffic enforcement, apply administrative measures, and collect accident data to produce expert findings and official accident reports (BAT).
B.Issue Brazilian National Driver's Licenses (CNH) and establish the national pedagogical curriculum for driver training centers (CFCs).
C.Judge administrative traffic infraction appeals in the second and final administrative instance as the National Traffic Council (CONTRAN).
D.Formulate municipal master mobility plans and regulate urban bus transit fares within metropolitan regions.
Explanation: Article 20 of the CTB establishes that the PRF is competent to carry out ostensible patrolling, enforce traffic regulations, apply infractions and administrative measures, investigate accidents, and draft official traffic accident reports (Boletim de Acidente de Trânsito - BAT) on federal highways.
2Pursuant to Article 29, Section III of the CTB, when vehicles approach an intersection of unpaved and paved roads or an un-signaled crossroads, which rule correctly governs right-of-way (preferência de passagem)?
A.A vehicle traveling on a paved highway has preference over a vehicle approaching from an unpaved road, and at an un-signaled roundabout, the vehicle already circulating within it has preference.
B.The larger vehicle always has preference of passage over smaller passenger vehicles regardless of roadway type or signage.
C.At an un-signaled intersection of two equal paved streets, the vehicle approaching from the left has preference over the vehicle from the right.
D.Vehicles traveling at higher speeds have legal right-of-way over slower vehicles entering from adjacent lanes.
Explanation: According to Art. 29, III of the CTB, in the absence of traffic signals, right-of-way belongs to: (a) the vehicle traveling on a highway (rodovia) when intersecting an unpaved road; (b) the vehicle circulating within a roundabout (rótula); and (c) in all other cases, the vehicle approaching from the driver's right.
3According to Article 29, Section VII of the CTB, under what precise conditions do emergency vehicles (such as PRF patrol cars, ambulances, and fire rescue) enjoy free circulation, stopping, and parking privileges?
A.Only when engaged in actual urgent emergency public service and properly identified by simultaneously activated sound alarms (sirens) and flashing red/blue light devices.
B.At all times during a patrol shift, regardless of whether sound sirens or optical warning devices are activated.
C.Exclusively when transporting an injured individual to an intensive care hospital with prior judicial authorization.
D.Only on dual-carriageway federal highways between sunrise and sunset under dry weather conditions.
Explanation: Art. 29, VII of the CTB stipulates that emergency, police, and rescue vehicles enjoy free movement, stopping, and parking only when rendering urgent public emergency service and when their continuous optical flashing lights and audible sirens are activated simultaneously.
4A motorist stopped at a PRF federal highway checkpoint refuses to submit to a breathalyzer test (etilômetro) or any clinical examination. Under Articles 165 and 165-A of the CTB, what are the direct administrative consequences for this refusal?
A.Infração gravíssima, fine multiplied by 10 (fator multiplicador x10), suspension of the right to drive for 12 months, recolhimento of the CNH, and retenção of the vehicle until a qualified sober driver is presented.
B.Infração grave, standard fine without multiplier, 5 penalty points, and immediate permanent revocation (cassação) of the driver's license.
C.Immediate custodial arrest without bail and mandatory imprisonment for a minimum of 2 years.
D.Infração média, 4 penalty points, and vehicle impoundment (remoção) with no possibility of presenting another driver.
Explanation: Articles 165 and 165-A of the CTB establish identical administrative penalties for driving under the influence and refusing certification tests: an infração gravíssima with a 10x fine multiplier (R$ 2,934.70), 12-month license suspension, seizure of the CNH, and retention of the vehicle until a habilitated sober driver is presented.
5Under Article 306 of the CTB and CONTRAN Resolution nº 432/2013, what objective threshold configures the crime of driving with impaired psychomotor capacity due to alcohol influence (embriaguez ao volante)?
A.An alveolar air alcohol concentration equal to or greater than 0.30 milligram of alcohol per liter of air (or blood alcohol level >= 6 decigrams per liter), or certified signs of impaired psychomotor capacity.
B.Any detected trace of alcohol above 0.00 mg/L in the breathalyzer, without the possibility of any measurement tolerance.
C.An alcohol concentration exceeding 1.50 mg/L in breath combined with an actual vehicular collision resulting in property damage.
D.A blood alcohol concentration of at least 12 decigrams per liter verified exclusively by an invasive hospital blood extraction.
Explanation: Pursuant to Art. 306 of the CTB and CONTRAN Res. 432/2013, the criminal threshold is characterized by a blood alcohol concentration >= 6 dg/L or a breath alcohol measurement >= 0.30 mg/L (with a measured value of 0.34 mg/L accounting for maximum allowable error), or verified behavioral signs of altered psychomotor capacity.
6In vehicular manslaughter (Homicídio Culposo na Direção de Veículo Automotor - Art. 302 of the CTB), which circumstance qualifies the offense, raising the statutory penalty to imprisonment (reclusão) of 5 to 8 years?
A.The driver was operating the vehicle with impaired psychomotor capacity due to the influence of alcohol or another psychoactive substance causing dependence.
B.The driver was operating a commercial cargo vehicle during heavy rainfall on an unpaved road.
C.The driver failed to replace worn brake pads during the preceding annual municipal inspection.
D.The driver was operating a vehicle with expired registration documentation (licenciamento vencido).
Explanation: Law nº 13.546/2017 added § 3º to Art. 302 of the CTB, establishing a qualified form of vehicular manslaughter with reclusão of 5 to 8 years if the agent drives under the influence of alcohol or any psychoactive substance.
7Regarding the crime of vehicular assault causing bodily injury (Lesão Corporal Culposa na Direção de Veículo Automotor - Art. 303 CTB), when does the offense become qualified with a penalty of reclusão of 2 to 5 years?
A.When the driver is under the influence of alcohol or drugs and the victim suffers grave or very grave bodily harm (lesão corporal de natureza grave ou gravíssima).
B.When the victim is a public security officer in uniform, regardless of the severity of injuries.
C.Whenever the collision occurs in a rural school zone during holiday periods.
D.Only when more than five motor vehicles are involved in a chain-reaction collision.
Explanation: Art. 303, § 2º of the CTB (introduced by Lei 13.546/2017) qualifies vehicular assault with reclusão of 2 to 5 years if the driver is under the influence of alcohol/drugs AND the resulting bodily injury is grave or gravíssima.
8Under Article 304 of the CTB (Omissão de Socorro no Trânsito), a driver involved in a traffic accident with victims who fails to provide immediate assistance:
A.Commits a traffic crime even if the victim died instantaneously or if third parties or emergency rescue teams were already providing aid, unless providing aid presented personal risk.
B.Is exempt from criminal liability if the accident was caused entirely by the victim's exclusive negligence.
C.Is only criminally liable if the driver was the sole proximate cause of the collision.
D.Cannot be charged under the CTB if the vehicle had third-party liability insurance.
Explanation: Art. 304 of the CTB establishes a crime of omission for any involved driver who fails to provide or solicit aid to accident victims, regardless of fault or whether third parties are present, provided the driver could do so without personal risk.
9Article 305 of the CTB criminalizes fleeing the scene of an accident to evade civil or criminal liability. Regarding its constitutionality, the Brazilian Federal Supreme Court (STF - Theme 907) established that:
A.Article 305 of the CTB is constitutional, as the duty to remain at the scene to facilitate identification does not violate the privilege against self-incrimination (nemo tenetur se detegere).
B.Article 305 is unconstitutional because it forces individuals to produce testimonial evidence against themselves.
C.Article 305 applies exclusively to public transport drivers operating under municipal concessions.
D.Article 305 was repealed by the New Civil Procedure Code (CPC/2015).
Explanation: In Theme 907 of General Repercussion (RE 971.959), the STF declared Art. 305 of the CTB constitutional, ruling that requiring a driver to remain at the scene for identification and public safety purposes does not breach the nemo tenetur se detegere principle.
10A motorist engages in an unauthorized high-speed race ('racha') on a federal highway (Art. 308 of the CTB). If this conduct results in the death of a third party, and the driver acted with culpa regarding the fatal result (preterdolo), what is the statutory criminal consequence?
A.Imprisonment (reclusão) of 5 to 10 years, without prejudice to other applicable penalties.
B.Detenção of 6 months to 2 years and a standard administrative fine.
C.Conversion into a pure administrative infraction with mandatory community service.
D.A simple fine without any criminal prosecution if the driver was a first-time offender.
Explanation: Art. 308, § 2º of the CTB establishes that if participating in an unauthorized street race results in death and the agent acted with negligence regarding that result (crime preterdoloso), the penalty is reclusão of 5 to 10 years.
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