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ANAC Private Pilot Airplane (PPA) study materials
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ANAC Private Pilot Airplane (PPA) (ANAC) practice questions

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Question 1Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Under Brazilian aviation regulations, an aircraft may only be flown if it holds a valid Certificate of Airworthiness and is maintained in accordance with which set of requirements?

  1. The maintenance schedule of the operator's home base
  2. The manufacturer's warranty terms only
  3. The operating limitations of any similar aircraft type
  4. The applicable airworthiness and maintenance requirements approved for that aircraft Correct answer.

Explanation

Flight is permitted only when the aircraft is airworthy, meaning it conforms to its approved type design and is maintained under the applicable airworthiness requirements. Operating limitations and maintenance must follow the documentation approved for that specific aircraft.

Question 2Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A private pilot certificate (licença de piloto privado) in Brazil authorizes the holder to act as pilot in command of an aircraft:

  1. Without receiving remuneration for the flight Correct answer.
  2. For remuneration, provided passengers are not charged
  3. For commercial air transport when accompanied by an instructor
  4. Carrying passengers or cargo for hire on non-scheduled flights

Explanation

The private pilot licence permits acting as pilot in command of aircraft without remuneration. Any flight for hire or reward requires a commercial or higher licence and an appropriate operator authorisation.

Question 3Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Regarding the validity of a pilot's medical certificate for private pilot operations, which statement is correct?

  1. The medical certificate may be replaced by a self-declaration at any age
  2. The medical certificate must be valid on the day of flight for the privileges being exercised Correct answer.
  3. The medical certificate is required only for the first solo flight
  4. The medical certificate is valid indefinitely once issued

Explanation

A pilot must hold a valid medical certificate appropriate to the privileges exercised whenever acting as a required crew member. Validity periods vary with age and category and must be current on the flight date.

Question 4Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Before flight, the pilot in command is responsible for ensuring that the aircraft's mass and centre of gravity:

  1. Are checked only when full fuel is carried
  2. May exceed limits if the flight is shorter than one hour
  3. Are estimated by the operator after landing
  4. Remain within the limits approved for the aircraft throughout the flight Correct answer.

Explanation

The pilot in command must confirm that loading keeps mass and balance within the approved envelope for the entire flight. Exceeding limits degrades performance and control and renders the flight unlawful.

Question 5Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Which document must be carried on board an aircraft operating in Brazilian airspace?

  1. The pilot's logbook only
  2. The aircraft purchase invoice
  3. The Certificate of Registration and the Certificate of Airworthiness Correct answer.
  4. The operator's insurance policy only

Explanation

The aircraft must carry its Certificate of Registration, Certificate of Airworthiness, and other documents specified in the regulations. These establish the aircraft's identity and airworthiness status during operations.

Question 6Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

In the event of an in-flight emergency, the pilot in command may deviate from air traffic rules:

  1. Only after receiving written authorisation from the control tower
  2. Only if no other aircraft are airborne
  3. Never, under any circumstances
  4. To the extent necessary to meet the emergency, and must report the deviation afterwards Correct answer.

Explanation

The pilot in command may deviate from rules to the extent required to handle an emergency. The deviation must be reported to the appropriate authority, and the pilot may be required to submit a report.

Question 7Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A flight plan for a flight subject to flight plan filing must normally be submitted:

  1. At least 30 minutes before the estimated departure time Correct answer.
  2. Only after takeoff
  3. At any time during the flight
  4. Only after landing

Explanation

Flight plans must be filed within the time prescribed before departure, commonly at least 30 minutes before the estimated off-block time for IFR and controlled flights. This allows air traffic services to coordinate the flight.

Question 8Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

The minimum visibility and cloud clearance requirements for flight under visual flight rules (VFR) in controlled airspace exist primarily to:

  1. Permit flight without any radio communication
  2. Reduce the cost of air traffic services
  3. Allow aircraft to fly closer together
  4. Ensure separation from other traffic and from obstacles by visual reference Correct answer.

Explanation

VFR weather minima ensure the pilot can see and avoid other traffic and obstacles. They define the visibility and distance from cloud needed to maintain visual separation.

Question 9Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft flying in the vicinity of an aerodrome must give way to:

  1. Aircraft with a larger wingspan
  2. Aircraft that are landing or in the final stages of approach Correct answer.
  3. Any aircraft flying at a higher altitude
  4. Aircraft on the ground only

Explanation

Aircraft in flight must give way to aircraft landing or on final approach. This rule protects the most constrained phase of flight, where manoeuvring options are limited.

Question 10Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Two aircraft are approaching head-on at approximately the same altitude. The correct action is for:

  1. The aircraft on the left to descend
  2. Both aircraft to alter heading to the right Correct answer.
  3. Both aircraft to maintain heading and reduce speed
  4. The faster aircraft to climb

Explanation

When two aircraft approach head-on, both must alter heading to the right to pass clear of each other. This provides a predictable, consistent avoidance manoeuvre.

Question 11Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

When two aircraft of the same category are converging at approximately the same altitude, the aircraft that has the other on its right must:

  1. Climb above the other aircraft
  2. Sound a warning and continue
  3. Give way to the other aircraft Correct answer.
  4. Maintain speed and altitude

Explanation

In converging traffic, the aircraft that observes the other on its right must give way. This rule establishes a single, predictable priority.

Question 12Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft on the ground that is taxiing must give way to:

  1. Vehicles on the service road
  2. Aircraft parked on the apron
  3. Aircraft with engines running only
  4. Aircraft that are taking off or landing Correct answer.

Explanation

Ground traffic must yield to aircraft taking off or landing, since those aircraft have limited ability to stop or manoeuvre. Taxiing aircraft must remain clear of runways in use.

Question 13Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft experiencing radio communication failure in VFR conditions should normally:

  1. Circle the aerodrome indefinitely
  2. Climb to the highest available altitude
  3. Continue to the destination and land without any signal
  4. Land as soon as practicable and notify air traffic services Correct answer.

Explanation

In VFR conditions with a radio failure, the pilot should land as soon as practicable and inform air traffic services. This restores two-way communication and allows coordination.

Question 14Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

The transition altitude in a flight information region is the altitude at which:

  1. Aircraft must reduce speed
  2. Aircraft must switch from QNH to standard pressure setting Correct answer.
  3. Aircraft begin descent
  4. Aircraft must contact the tower

Explanation

At the transition altitude, pilots change from the local altimeter setting (QNH) to the standard pressure setting for flight levels. The transition level marks the reverse change during descent.

Question 15Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A pilot flying at a flight level above the transition altitude should set the altimeter to:

  1. The QFE of the departure aerodrome
  2. The aerodrome elevation
  3. The local QNH
  4. The standard pressure setting of 1013.2 hPa Correct answer.

Explanation

Above the transition altitude, altimeters are set to the standard pressure of 1013.2 hPa so that all aircraft use a common reference. This ensures vertical separation based on flight levels.

Question 16Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

The semicircular rule for cruising levels requires that aircraft flying on a magnetic track between 000 and 179 degrees use:

  1. Even flight levels
  2. Levels assigned only by the tower
  3. Any level without restriction
  4. Odd flight levels Correct answer.

Explanation

Under the semicircular rule, tracks from 000 to 179 degrees use odd levels, while tracks from 180 to 359 degrees use even levels. This separates opposing traffic flows.

Question 17Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft operating under VFR at night in controlled airspace must:

  1. Rely on see-and-avoid without any equipment
  2. Use only visual references to the ground
  3. Meet the applicable equipment and qualification requirements for night VFR Correct answer.
  4. Fly without a flight plan

Explanation

Night VFR is permitted only when the pilot and aircraft meet the additional requirements prescribed for night operations. These include specific equipment and pilot qualification conditions.

Question 18Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

When an air traffic control clearance and a pilot's request conflict, the pilot should:

  1. Read back the clearance and comply
  2. Request clarification or an amended clearance before proceeding Correct answer.
  3. Comply immediately without question
  4. Ignore the clearance and continue as planned

Explanation

If a clearance is unclear or appears unsafe, the pilot must seek clarification or an amended clearance. A clearance does not relieve the pilot of responsibility for safety.

Question 19Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft must display anticollision lights:

  1. Only when flying above 10,000 feet
  2. Only when parked
  3. Only during daylight hours
  4. During flight and, where fitted, while on the ground with engines running Correct answer.

Explanation

Anticollision lights must be operated during flight and, when installed, while the aircraft is on the ground with engines running. They improve conspicuity to other traffic and ground personnel.

Question 20Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A pilot who receives a clearance to land may expect that:

  1. The tower assumes responsibility for the landing
  2. The pilot still retains responsibility to ensure the runway is safe before landing Correct answer.
  3. Other aircraft will not enter the runway
  4. The runway is clear of all traffic and obstacles

Explanation

A landing clearance does not transfer responsibility for the landing to the controller. The pilot must still verify that the runway is clear and the landing can be made safely.

Question 21Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

The pilot in command of an aircraft involved in an accident that causes serious injury must:

  1. Report the accident to the appropriate authority without delay Correct answer.
  2. Report only if the aircraft is damaged
  3. Wait for the insurance company before reporting
  4. Leave the scene immediately

Explanation

Accidents involving serious injury or substantial damage must be reported promptly to the investigating authority. The pilot also has obligations regarding preservation of the scene and providing assistance.

Question 22Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft flying VFR in Class C airspace must:

  1. Fly only below 500 feet
  2. Obtain an ATC clearance and maintain two-way radio communication Correct answer.
  3. Operate without a transponder in all cases
  4. Avoid all controlled airspace

Explanation

VFR flights in Class C airspace require an ATC clearance and continuous two-way radio communication. The airspace is controlled, so separation services and clearances apply.

Question 23Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A pilot planning a flight into an aerodrome with an operating control tower must establish radio communication:

  1. Only when flying IFR
  2. Before entering the aerodrome traffic circuit, as prescribed Correct answer.
  3. Only after landing
  4. Only if the tower requests it

Explanation

Pilots must establish two-way radio communication with the tower before entering the aerodrome traffic circuit or as otherwise prescribed. This allows the tower to sequence and separate traffic.

Question 24Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

The holder of a pilot licence must not act as pilot in command if they:

  1. Know of a physical or mental condition that would impair safe flight Correct answer.
  2. Have not flown in the previous 24 hours
  3. Are flying an unfamiliar aircraft type
  4. Have not updated their logbook that day

Explanation

A pilot must not exercise licence privileges while aware of any condition that could impair the safe conduct of the flight. This responsibility applies regardless of the medical certificate's validity.

Question 25Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft's registration marks must be:

  1. Displayed only on the fuselage interior
  2. Changed at each international flight
  3. Displayed in a manner that is visible and in accordance with the prescribed specifications Correct answer.
  4. Removed during maintenance

Explanation

Registration marks must be displayed in accordance with prescribed size, location, and visibility specifications. They identify the aircraft and must remain legible during operations.

Question 26Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

Under the Brazilian aeronautical rules, an aircraft commander must notify the competent authority of an occurrence involving which of the following?

  1. A collision on the ground causing substantial damage to the aircraft Correct answer.
  2. A passenger complaint filed after landing
  3. A change of cruising level requested by air traffic control
  4. Any delay of more than fifteen minutes in the scheduled departure

Explanation

Occurrences that must be reported include accidents and serious incidents, such as ground collisions producing substantial damage or injury. Routine operational events and passenger complaints are not reportable occurrences of this type.

Question 27Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

For a private pilot to carry passengers, the licence holder must, in addition to holding a valid licence and medical certificate, have completed:

  1. A proficiency check with an examiner every six months
  2. A night qualification before any passenger flight
  3. A cross-country flight of at least 300 nautical miles as pilot in command
  4. A minimum of three take-offs and landings in the preceding ninety days Correct answer.

Explanation

Recent flight experience requirements oblige the pilot to have performed recent take-offs and landings within the preceding ninety days before carrying passengers. Longer cross-country flights, periodic examiner checks and night qualifications are separate requirements not tied to the basic carriage of passengers.

Question 28Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft is parked on an apron and the pilot intends to start the engine. Which precaution is required before starting?

  1. Switch off the anticollision lights to avoid distracting ground staff
  2. Ensure the area around the propeller is clear and warn nearby persons Correct answer.
  3. Request the fire service to stand by for every engine start
  4. Obtain a specific clearance from the aerodrome control tower for each engine start

Explanation

Before starting an engine the pilot must ensure that persons and obstacles are clear of the propeller and that anyone nearby is warned. A start clearance is not universally required, and anticollision lights are switched on, not off, to signal that the engine is running or about to run.

Question 29Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

A pilot holds a private pilot licence and is offered payment to fly a passenger to a nearby city for business purposes. Under the rules applicable to a private pilot licence, the pilot may:

  1. Share the direct costs of the flight with the passenger without profit Correct answer.
  2. Charge the full commercial fare provided the aircraft is privately owned
  3. Accept the payment only if the passenger signs a liability waiver
  4. Accept the payment because the flight is short and within the same state

Explanation

A private pilot licence does not authorise commercial air transport, but the pilot and passengers may share the direct costs of a flight without any element of profit. Accepting payment for transport or charging a fare would constitute remuneration for hire.

Question 30Air Law / Regulamento de Tráfego Aéreo e Legislação Aeronáutica

An aircraft is being operated under visual flight rules in airspace where a transponder is required. The pilot notices that the transponder has failed. What is the most appropriate course of action?

  1. Continue the flight as planned and inform air traffic control at the destination only
  2. Turn back immediately to the departure aerodrome without notifying anyone
  3. Increase altitude above the transition level so the failure no longer applies
  4. Inform air traffic control as soon as practicable and comply with any instructions given Correct answer.

Explanation

When a required piece of equipment fails, the pilot must inform air traffic control as soon as practicable so that separation and routing can be adjusted, and must follow the instructions received. Simply continuing or changing level does not resolve the equipment requirement.

Question 31Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Em uma aeronave com motor a pistão, qual componente é responsável por transformar o movimento alternativo dos pistões em movimento rotativo da hélice?

  1. O carburador
  2. O radiador
  3. O virabrequim Correct answer.
  4. A magneto

Explanation

O virabrequim recebe a força das bielas e converte o movimento linear dos pistões em rotação, transmitindo-a ao eixo da hélice. Os demais componentes citados pertencem aos sistemas de alimentação, ignição e arrefecimento.

Question 32Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a função do sistema de ignição por magnetos em um motor aeronáutico?

  1. Pressurizar o combustível até os bicos injetores
  2. Produzir a centelha que inflama a mistura no cilindro Correct answer.
  3. Acionar o motor de partida durante a decolagem
  4. Regular a pressão do óleo lubrificante

Explanation

Os magnetos geram alta tensão de forma independente da bateria e a distribuem às velas, produzindo a centelha que inflama a mistura ar-combustível. Isso garante ignição mesmo em caso de falha do sistema elétrico principal.

Question 33Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Em uma hélice de passo fixo, o que ocorre com o ângulo de ataque das pás quando a velocidade da aeronave aumenta, mantendo-se a rotação constante?

  1. Aumenta, elevando a tração produzida
  2. Inverte-se, passando a produzir arrasto
  3. Diminui, reduzindo a tração produzida Correct answer.
  4. Permanece constante em qualquer velocidade

Explanation

Com passo fixo, o ângulo de ataque depende da relação entre a velocidade de rotação e a velocidade de avanço. Ao aumentar a velocidade da aeronave, o ângulo de ataque geométrico efetivo diminui, reduzindo a tração.

Question 34Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual instrumento indica diretamente a rotação do motor em RPM?

  1. O altímetro
  2. O tacômetro Correct answer.
  3. O velocímetro
  4. O indicador de curva e derrapagem

Explanation

O tacômetro mede a rotação do motor ou da hélice em rotações por minuto. É essencial para verificar os limites operacionais e o desempenho do grupo motopropulsor.

Question 35Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Em um motor com carburador, qual é o efeito do acúmulo de gelo no difusor (venturi) do carburador?

  1. O aumento da pressão de admissão e o ganho de potência
  2. A redução da vazão de mistura e a queda de potência Correct answer.
  3. A elevação da temperatura do óleo lubrificante
  4. O aumento da pressão do combustível nos bicos

Explanation

No venturi a pressão cai e a temperatura diminui, favorecendo a formação de gelo. O gelo restringe a passagem da mistura, empobrecendo-a e reduzindo a potência, podendo causar falha do motor.

Question 36Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a finalidade do sistema de aquecimento do carburador?

  1. Aumentar a potência máxima do motor
  2. Pressurizar o cárter para evitar vazamentos
  3. Prevenir ou eliminar a formação de gelo no carburador Correct answer.
  4. Resfriar a mistura antes da admissão

Explanation

O aquecimento do carburador direciona ar quente da caixa de ar em torno do corpo do carburador, elevando a temperatura e evitando ou removendo o gelo. Ele também empobrece a mistura, por isso deve ser usado com critério.

Question 37Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Em uma aeronave com hélice de passo variável, o que ocorre ao se selecionar passo mais fino (baixo passo) durante a decolagem?

  1. A hélice reduz a rotação e aumenta a velocidade de cruzeiro
  2. A hélice permite maior rotação e produz mais tração em baixa velocidade Correct answer.
  3. A hélice reduz o arrasto e melhora a razão de planeio
  4. A hélice entra em passo bandeira e cessa a tração

Explanation

O passo fino oferece menor resistência ao giro, permitindo que o motor atinja rotação elevada e gere tração máxima em baixas velocidades, condição desejada na decolagem. O passo mais grosso é usado em cruzeiro.

Question 38Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a função do óleo lubrificante em um motor aeronáutico?

  1. Aumentar a taxa de compressão dos cilindros
  2. Reduzir o atrito, auxiliar no arrefecimento e proteger contra corrosão Correct answer.
  3. Servir como combustível auxiliar em alta potência
  4. Substituir o líquido de arrefecimento nos motores refrigerados a ar

Explanation

O óleo lubrifica as partes móveis, reduzindo o atrito e o desgaste, transporta calor para o arrefecimento e forma uma película protetora contra corrosão. Também auxilia na vedação dos anéis.

Question 39Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

O que indica uma queda súbita da pressão do óleo em voo?

  1. Funcionamento normal em regime de cruzeiro
  2. Indicação de que o motor está superaquecido apenas
  3. Possível falha na lubrificação, exigindo ação imediata do piloto Correct answer.
  4. Aumento da potência disponível do motor

Explanation

A pressão de óleo baixa pode indicar vazamento, falha da bomba ou falta de óleo, levando a superaquecimento e danos graves ao motor. O piloto deve reduzir a potência e pousar assim que possível.

Question 40Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Em um motor aeronáutico refrigerado a ar, qual é o principal meio de dissipação do calor dos cilindros?

  1. A passagem de ar pelas aletas de arrefecimento Correct answer.
  2. A evaporação do combustível no cárter
  3. A troca de calor com o óleo do radiador de água
  4. A circulação de água pelo bloco

Explanation

Nos motores refrigerados a ar, as aletas aumentam a área de troca térmica e o fluxo de ar ao redor dos cilindros remove o calor. Por isso, o controle de temperatura do cabeçote é fundamental em subidas e baixas velocidades.

Question 41Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a função da mistura ar-combustível empobrecida em altitude elevada?

  1. Compensar a menor densidade do ar, mantendo a relação adequada Correct answer.
  2. Aumentar o consumo de combustível para ganhar potência
  3. Resfriar as velas para evitar a pré-ignição
  4. Elevar a pressão de admissão do motor

Explanation

Com o aumento da altitude, a densidade do ar diminui e a massa de ar admitida cai. Empobrecer a mistura mantém a proporção ar-combustível adequada, evitando excesso de combustível e perda de potência.

Question 42Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

O que é detonação em um motor a pistão?

  1. A falha da vela em produzir centelha
  2. A queima normal e progressiva da mistura após a centelha
  3. A combustão explosiva e descontrolada da mistura, que pode danificar o motor Correct answer.
  4. O resfriamento excessivo da câmara de combustão

Explanation

A detonação ocorre quando a mistura se inflama de forma explosiva antes da frente de chama normal, gerando picos de pressão e temperatura que podem danificar pistões e válvulas. É combatida com mistura adequada, rotação correta e combustível de octanagem apropriada.

Question 43Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a diferença entre pré-ignição e detonação?

  1. A pré-ignição só ocorre em motores a diesel; a detonação só em motores a gasolina
  2. A pré-ignição é inofensiva; a detonação é sempre normal
  3. A pré-ignição ocorre apenas em cruzeiro; a detonação apenas na decolagem
  4. A pré-ignição ocorre antes da centelha; a detonação é uma queima explosiva após a centelha Correct answer.

Explanation

Na pré-ignição, a mistura se inflama antes do momento da centelha, geralmente por pontos quentes na câmara. Na detonação, a mistura já inflamada pela centelha queima de forma explosiva, gerando ondas de choque.

Question 44Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a finalidade do sistema de escape do motor?

  1. Conduzir os gases queimados para fora da aeronave Correct answer.
  2. Admitir ar filtrado para o carburador
  3. Pressurizar a cabine em voo
  4. Resfriar o óleo lubrificante

Explanation

O sistema de escape coleta e direciona os gases resultantes da combustão para fora da aeronave, reduzindo ruído e evitando que entrem na cabine. Em algumas aeronaves, também fornece ar quente para o aquecimento da cabine.

Question 45Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Por que o escape do motor é uma fonte de risco de intoxicação por monóxido de carbono na cabine?

  1. O escape libera oxigênio puro que satura a cabine
  2. Os gases de escape contêm monóxido de carbono inodoro, que pode vazar para a cabine Correct answer.
  3. O escape aquece o combustível e gera vapores tóxicos
  4. O escape produz vapor d'água que reduz a visibilidade

Explanation

O monóxido de carbono é um gás inodoro e incolor presente nos gases de escape, que pode penetrar na cabine por trincas no sistema de aquecimento. A exposição causa sonolência e perda de capacidade, sendo essencial ventilar e verificar o sistema.

Question 46Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a função do sistema elétrico de uma aeronave leve?

  1. Fornecer energia para partida, iluminação, aviônicos e recarga da bateria Correct answer.
  2. Gerar a centelha de ignição do motor
  3. Controlar a mistura ar-combustível
  4. Pressurizar o sistema hidráulico dos freios

Explanation

O sistema elétrico alimenta o motor de partida, os instrumentos, as luzes e os equipamentos de comunicação e navegação, além de recarregar a bateria por meio do alternador. A ignição por magnetos é independente desse sistema.

Question 47Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

O que ocorre se o alternador falhar em voo e a bateria permanecer como única fonte?

  1. Os equipamentos elétricos passam a operar por tempo limitado até a descarga da bateria Correct answer.
  2. O motor para imediatamente por falta de ignição
  3. A hélice perde passo e a aeronave entra em pane
  4. Os magnetos deixam de funcionar instantaneamente

Explanation

Com a falha do alternador, a bateria sustenta os equipamentos elétricos por tempo limitado, dependendo da carga. O motor continua funcionando porque a ignição por magnetos é independente do sistema elétrico.

Question 48Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Qual é a função do sistema de combustível de uma aeronave?

  1. Resfriar o motor por meio da evaporação do combustível
  2. Gerar a centelha de ignição nos cilindros
  3. Lubrificar os cilindros durante a combustão
  4. Armazenar, filtrar e fornecer combustível ao motor com pressão adequada Correct answer.

Explanation

O sistema de combustível armazena o combustível nos tanques, filtra impurezas e o conduz ao motor com vazão e pressão adequadas. Inclui bombas, válvulas seletoras e drenos para garantir alimentação contínua.

Question 49Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

Antes do primeiro voo do dia, por que se deve drenar os pontos de purga do sistema de combustível?

  1. Para reduzir o peso da aeronave antes da decolagem
  2. Para pressurizar os tanques antes da partida
  3. Para verificar a presença de água ou contaminantes no combustível Correct answer.
  4. Para aumentar a octanagem do combustível

Explanation

A água é mais densa que o combustível e se acumula nos pontos baixos do sistema. A drenagem permite verificar visualmente a presença de água, sedimentos ou combustível contaminado antes do voo.

Question 50Aircraft General Knowledge / Conhecimentos Técnicos de Aeronave

O que significa a indicação de octanagem de um combustível de aviação?

  1. A viscosidade do combustível em baixas temperaturas
  2. A quantidade de energia por litro de combustível
  3. A resistência do combustível à detonação sob compressão Correct answer.
  4. A temperatura de congelamento do combustível

Explanation

A octanagem expressa a capacidade antidetonante do combustível, ou seja, sua resistência à detonação em condições de alta compressão e temperatura. Utilizar combustível com octanagem inferior à especificada pode causar detonação.