← Voltar para a lista de provas Marinha do Brasil · Oficial dos Quadros Complementares (CP-QC-CA-FN) — Eletrônica 51 questões nesta prova · página 1 de 3 · 50 com gabarito Gabarito disponível Issa não tinha experiência real prévia em socorrer vítimas de tiro. O parágrafo 5 diz que ele se apoiou em simulações de atendimento a vítimas feitas em treinamento. Isso indica que não tinha vivência real anterior com esse tipo de situação. A está errada porque ele queria servir no exterior, não a bordo de navio. B está errada porque ele correu em direção aos atiradores antes de entender o alvo. D está errada porque deu poucos detalhes ao sargento. E está errada porque ele não se considera herói e não queria o prêmio. Referência: Interpretação de texto em inglês Resolução comentada do VaiConcursos. Gabarito disponível 'Full ride' é uma bolsa integral, um tipo de prêmio/benefício concedido. No texto, Issa recusou 'a full ride' para a universidade, ou seja, uma bolsa de estudos integral. Dentre as opções, a que mais se aproxima é 'award', algo concedido por mérito. 'Drive' e 'hitch' têm outros sentidos (dirigir, carona). 'Loan' é um empréstimo, que não se recusa como 'full ride' nesse sentido. 'Fellowship' é uma bolsa de pós-graduação ou pesquisa, o que é menos adequado que 'award' segundo o gabarito. Referência: Vocabulário em contexto Resolução comentada do VaiConcursos. Gabarito disponível Ingenuity = creativity; unleashed = released. 'Ingenuity' significa inventividade ou criatividade. 'Unleashed' significa solto ou liberado, ou seja, released. A opção D traz o par correto. 'Bound' é o oposto de unleashed, e 'secured' também. 'Naivety', 'simplicity' e 'credulity' não são sinônimos de ingenuity nesse contexto. Referência: Vocabulário em contexto Resolução comentada do VaiConcursos. Gabarito disponível Os voluntários ajudam a empresa a obter informações mais precisas. O parágrafo 3 diz que a empresa espera uma boa amostra de voluntários para obter 'the most accurate information possible for important balance calculations'. Logo, quem aceita ser pesado contribui para esse objetivo. A está errada porque a pesagem já começou. B está errada porque as companhias nunca sabem o peso exato. C está errada porque a reação negativa era uma preocupação, não algo que passageiros receberiam. D distorce a fala: o 'peace of mind' se refere ao fato de o peso não ser ligado a dados pessoais. Referência: Interpretação de texto em inglês Resolução comentada do VaiConcursos. Gabarito disponível Pronome relativo não restritivo para coisa: which. A oração entre vírgulas 'which replaces Vietnam War-era Hueys' é explicativa e se refere ao helicóptero, uma coisa. Nesse caso usa-se 'which'. 'What' não funciona como pronome relativo aqui. 'Who' e 'whom' são para pessoas. 'Whose' indica posse, o que não faz sentido na frase. Referência: Gramática inglesa – relative clauses Resolução comentada do VaiConcursos. Gabarito disponível A sequência correta é got along / made up / looked for / found out / called off. 'Get along' é se dar bem. 'Made up stories' é inventar histórias. 'Looked for' é procurar. 'Found out' é descobrir. 'The party was called off' é a festa ter sido cancelada. 'Made out' (A) e 'made over' (C, D) não significam inventar. 'Looked over' e 'looked up' não são procurar algo perdido. 'Put off' significa adiar, e 'called over' ou 'pulled on' não se aplicam ao cancelamento da festa. 'Figured out' não se encaixa em 'embezzling'. Referência: Phrasal verbs Resolução comentada do VaiConcursos. Gabarito disponível 'Despite' seguido de gerúndio completa a frase. 'Despite being renowned' tem a estrutura preposição + gerúndio, que é a correta. 'Despite' já inclui o sentido de 'in spite of'. 'Although', 'Even though' e 'Even if' são conjunções e exigem sujeito + verbo, não gerúndio. 'In spite' sozinho está incompleto e precisa de 'of'. Referência: Gramática inglesa – conectivos de contraste Resolução comentada do VaiConcursos. Gabarito disponível A alternativa C é a única gramaticalmente incorreta. Em 'Would he have moved ... if he should?' há mistura indevida de formas. 'Should' em condicional só ocorre em 'if he should + verbo' (condição improvável no futuro), e não combina com 'would have moved'. Seria correto, por exemplo, 'if he had been able to / had wanted to'. A usa a inversão 'Were we to need' corretamente. B usa 'Suppose' com past perfect de forma aceitável. D usa 'wish they could have lived' corretamente. E usa a inversão 'Had you gotten' corretamente. Referência: Gramática inglesa – orações condicionais Resolução comentada do VaiConcursos. Gabarito disponível A sequência correta é are / experiences / didn't / relate / are studying. O sujeito 'The effects' é plural, então pede 'are'. 'Rogulja herself experiences' está na 3ª pessoa do singular no presente. 'Last night I didn't sleep' pede passado. Depois de 'can', usa-se o verbo base 'relate', e 'that we are studying' está no presente contínuo. A, D usam 'is' com 'effects', que está no plural. B e E usam 'experience' ou 'experiencing' e formas verbais incorretas. 'Could' não combina com 'Last night', e 'relating' ou 'related' após 'can' é incorreto. Referência: Gramática inglesa – concordância e tempos verbais Resolução comentada do VaiConcursos. Gabarito disponível A sequência de preposições correta é in / during / in / into / amid / on. Usa-se 'In November 1943' (mês), 'during their first big foray' (durante), 'atoll in the Gilbert Islands' (localização), 'smashed into a reef' (colisão), 'amid Japanese gunfire' (em meio a) e '300 on the reef' (sobre o recife). B usa 'On November', mas meses pedem 'in'. C e D usam 'to' ou 'between', que não combinam com 'smashed' nem com 'gunfire'. E usa 'At November' e 'among', ambos inadequados. Referência: Gramática inglesa – preposições Resolução comentada do VaiConcursos. Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Em coordenadas polares, a integral vale 15π/8. Em polares, 1≤r≤2 e 0≤θ≤π/2, com integrando r²·r dr dθ. Então ∫₀^{π/2}dθ · ∫₁² r³dr = (π/2)·(16−1)/4 = 15π/8. B dobra o resultado, o que equivale a usar meia coroa. C, D e E vêm de esquecer o jacobiano r ou de errar os limites e as potências de r. Referência: Cálculo – integrais duplas em coordenadas polares Resolução comentada do VaiConcursos. Gabarito disponível Gabarito disponível r1 = 1001011001010000₂, r2 = 400₁₆ e r3 = 37813₁₀. x = 165₁₆ = 357₁₀ e y = 97B5₁₆ = 38837₁₀. Então r1 = 38837 − 357 = 38480 = 9650₁₆ = 1001011001010000₂. Também r2 = 357 + 667 = 1024 = 400₁₆, e r3 = 38480 − 667 = 37813₁₀. A e E trazem 39861, que é um erro de soma no lugar da subtração. B tem r1 com os bits errados. D tem r1 e r2 incorretos (9916₁₆ não é 1024). Referência: Eletrônica Digital – conversão e aritmética entre bases Resolução comentada do VaiConcursos. Gabarito disponível P=200, Δf=3 MHz e B=150 kHz. A potência é A²/2 = 20²/2 = 200. A frequência instantânea é fc + m'(t)/2π, e m'(t) = 3·10⁶π·cos(3·10⁵πt) + 3·10⁶π·cos(2·10⁵πt). Seu máximo é 6·10⁶π, então Δf = 3 MHz. As componentes de m(t) têm 150 kHz e 100 kHz, de modo que a largura de banda de m(t) é 150 kHz. A usa potência 20 e banda 100 kHz. C e E usam Δf = 6 MHz, que esquece de dividir por 2π. D e E usam potência 400, que ignora o fator 1/2. A, C e E também erram a banda, pois a maior frequência é 150 kHz. Referência: Telecomunicações – modulação angular (PM/FM) Resolução comentada do VaiConcursos.Marinha do Brasil — CP-QC-CA-FN/2024 — Eletrônica — Prova Amarela
Marine receives rare heroism award for saving victim shot 23 times
[1] Issa, now 25, decided to become a Marine when he was 18, he said in an interview with Marine Corps Times on Tuesday. He turned down a full ride to Ohio State University because it didn't feel right to him to pursue the privilege of college without first serving overseas.
[2] In January 2023, Issa was serving with the infantry unit 3rd Battalion, 3rd Marines, at Marine Corps Base Hawaii. The night of the shooting, he and a fellow Marine had wrapped up dinner at Olive Garden and walked into a bar in the Waikiki neighborhood of Honolulu in search of a bathroom. They had been there for only a few minutes when the gunfire started.
[3] When Issa saw the gunmen, he initially thought they were trying to enter the bar. He rushed toward the pair, pushing a few people behind a table to cover them as he went. Then he realized the shooters were targeting someone on the sidewalk. “I just felt like I was on a range,” Issa said. “I don't know if it was one of those blocks that I had from being in the Marine Corps infantry, but at the time I didn't feel like there was any danger associated with shooting, but I did feel like there was danger for the victim.”
[4] The two gunmen escaped, but one of them sporadically was shooting back at the victim as he ran away, Issa recalled. In those moments, the Marine exposed himself to the fire to attend to the victim.
[5] Issa relied on the casualty care simulations he had run through in training. He took off the victim's shirt and checked him for bullet wounds, of which there were several. Meanwhile, Issa felt a warm sensation on his knees, which were applying pressure near the victim's crotch to cut off the femoral artery. It was blood. Realizing that the victim's legs needed attention, Issa removed the flannel shirt from his own body and fashioned a makeshift tourniquet for the right leg. When two police officers arrived, Issa received from them a pair of real tourniquets that he used on the victim's legs.
[6] The case later was classified as second-degree attempted murder, the Honolulu Police Department told Marine Corps Times on Wednesday. No arrests were made, the police said, and the victim withdrew his complaint and did not want to prosecute.
[7] That night, Issa told his first sergeant that there had been a shooting, though he gave few details. But three Marine officers who happened to have been at the bar and witnessed Issa's actions informed his command, Issa said.
[8] On Feb. 19, Issa received the Navy and Marine Corps Medal from Navy Capt. Michael Puffer, the commanding officer of the Naval ROTC at the University of South Florida. The medal - the highest award for heroism outside of combat - recognizes service members who have taken heroic actions at the risk of their own lives. It's a rare honor.
[9] But, for now, Issa's medal is tucked away in a storage container. Issa said he means no disrespect to those who put in effort to secure him the recognition. It's just that he didn't want an award, because, in his view, what he did is just what anyone should try to do in that situation. “I don't think that any life is more important than another,” he said.
(Abridged from https://www.militarytimes.com)
According to the text, it is correct to state that Issa:Resolução comentada
Análise das alternativas
Marine receives rare heroism award for saving victim shot 23 times
[1] Issa, now 25, decided to become a Marine when he was 18, he said in an interview with Marine Corps Times on Tuesday. He turned down a full ride to Ohio State University because it didn't feel right to him to pursue the privilege of college without first serving overseas.
[2] In January 2023, Issa was serving with the infantry unit 3rd Battalion, 3rd Marines, at Marine Corps Base Hawaii. The night of the shooting, he and a fellow Marine had wrapped up dinner at Olive Garden and walked into a bar in the Waikiki neighborhood of Honolulu in search of a bathroom. They had been there for only a few minutes when the gunfire started.
[3] When Issa saw the gunmen, he initially thought they were trying to enter the bar. He rushed toward the pair, pushing a few people behind a table to cover them as he went. Then he realized the shooters were targeting someone on the sidewalk. “I just felt like I was on a range,” Issa said. “I don't know if it was one of those blocks that I had from being in the Marine Corps infantry, but at the time I didn't feel like there was any danger associated with shooting, but I did feel like there was danger for the victim.”
[4] The two gunmen escaped, but one of them sporadically was shooting back at the victim as he ran away, Issa recalled. In those moments, the Marine exposed himself to the fire to attend to the victim.
[5] Issa relied on the casualty care simulations he had run through in training. He took off the victim's shirt and checked him for bullet wounds, of which there were several. Meanwhile, Issa felt a warm sensation on his knees, which were applying pressure near the victim's crotch to cut off the femoral artery. It was blood. Realizing that the victim's legs needed attention, Issa removed the flannel shirt from his own body and fashioned a makeshift tourniquet for the right leg. When two police officers arrived, Issa received from them a pair of real tourniquets that he used on the victim's legs.
[6] The case later was classified as second-degree attempted murder, the Honolulu Police Department told Marine Corps Times on Wednesday. No arrests were made, the police said, and the victim withdrew his complaint and did not want to prosecute.
[7] That night, Issa told his first sergeant that there had been a shooting, though he gave few details. But three Marine officers who happened to have been at the bar and witnessed Issa's actions informed his command, Issa said.
[8] On Feb. 19, Issa received the Navy and Marine Corps Medal from Navy Capt. Michael Puffer, the commanding officer of the Naval ROTC at the University of South Florida. The medal - the highest award for heroism outside of combat - recognizes service members who have taken heroic actions at the risk of their own lives. It's a rare honor.
[9] But, for now, Issa's medal is tucked away in a storage container. Issa said he means no disrespect to those who put in effort to secure him the recognition. It's just that he didn't want an award, because, in his view, what he did is just what anyone should try to do in that situation. “I don't think that any life is more important than another,” he said.
(Abridged from https://www.militarytimes.com)
By reading the text, it is correct to infer that “full ride” in “He turned down a full ride to Ohio State University [...]” refers to a kind of:Resolução comentada
Análise das alternativas
Jeff Bezos wants a trillion humans in solar system
Just when demographers are ringing alarm bells about overpopulation, Amazon founder Jeff Bezos says we need to populate our solar system. Mr. Bezos was asked for his thoughts on humanity living in outer space in a thousand years' time. He replied: "I would love to see, you know, a trillion humans living in the solar system. If we had a trillion humans, we would have at any given time 1,000 Mozarts and 1,000 Einsteins. Space would be full of life and intelligence and energy." He added that he wants to help "build heavy infrastructure that will be used by the space entrepreneurs of future generation, so that ingenuity and imagination can really be unleashed".
(Adapted from https://breakingnewsenglish.com)
In the excerpt “[...] so that ingenuity and imagination can really be unleashed.”, the words “ingenuity” and “unleashed” mean, respectively:Resolução comentada
Análise das alternativas
Airline starts to weigh luggage AND passengers
[1] Finland's national carrier Finnair has started weighing passengers on its flights from the capital city of Helsinki. The weigh-ins are being done on a voluntary basis and are completely anonymous.
[2] A company spokesperson said the new initiative is to ensure safety standards on flights are adhered to. He said any airplane should not exceed the prescribed maximum weight for safe take-offs and landings. This weight is made up of the aircraft itself, the fuel, checked baggage and cargo, onboard catering, water tanks, and passengers. Finnair said airlines never know the exact weight of passengers and their carry-on baggage, so they have to rely on average estimates provided by aviation authorities.
[3] Passengers who volunteer to be weighed are stepping on weighing scales at the departure gates at Helsinki Airport. Finnair officials were initially concerned about a customer backlash because weight is such a personal issue. However, in the first week of the tests, over 1,000 passengers had agreed to be weighed. The company said: "We hope to have a good sample of volunteers, both business and leisure travellers, so that we can get the most accurate information possible for important balance calculations." It added: "Our customers have taken it really positively so far." An official said travellers could "rest assured" and have "peace of mind" that their weight would not be linked to their personal data.
(Adapted from https://breakingnewsenglish.com)
According to the text, it is correct to state that:Resolução comentada
Análise das alternativas
Air Force's first Grey Wolf patrol helicopter arrives at Malmstrom
The first field-ready MH-139 Grey Wolf arrived at Montana's Malmstrom Air Force Base earlier this month, marking the start of operations for a new fleet of aircraft designed to safeguard America's land-based nuclear missiles.
The MH-139 Grey Wolf helicopter, ______ replaces Vietnam War-era Hueys, will be used to patrol the intercontinental ballistic missile fields at Malmstrom; F.E. Warren AFB, Wyoming; and Minot AFB, North Dakota.
(Adapted from https://www.militarytimes.com)Resolução comentada
Análise das alternativas
I- She never argued with her father. They _____very well most of the time.
II- Tim's such a liar! Last night he _____ all sorts of stories. We almost believed him!
III- I couldn't find my glasses. I _____ them everywhere!
IV- Jack _____ that his partner was embezzling money from their company.
V- Unfortunately the party was _____. It was raining too heavily.Resolução comentada
Análise das alternativas
8 Great Projects Apple Killed Like Its Electric Car
The Apple Car is one of the highest-profile projects Apple failed to complete, but it's far from the only one.
______ being renowned for its innovations, Apple has had no choice but to abandon several projects over the past decades.
Here, we'll take a trip down memory lane and revisit Apple's canceled projects and other products that didn't make the market.
(Adapted from https://www.makeuseof.com)Resolução comentada
Análise das alternativas
Resolução comentada
Análise das alternativas
The effects of too little sleep ______ something Rogulja herself ______ on a regular basis. "Last night I ______sleep well and I can feel it," she says. "So I can, kind of, intuitively ______ to these animals that we ______."
(Adapted from https://www.npr.org)Resolução comentada
Análise das alternativas
The Battle of Tarawa was a disaster from the start. _____ November 1943, _____ their first big foray in the central Pacific Ocean, US forces invaded this atoll _____ the Gilbert Islands, hoping to dislodge Japanese troops and push closer to Tokyo. But as soon as the assault began, it literally ran aground. Most of the landing boats smashed _____ a shallow coral reef, forcing marines to flounder their way to shore _____ Japanese gunfire. One in five US troops died in the battle - 300 _____ the reef alone.
(Adapted from https://doi.org/10.1038/d41586-022-02287-6)Resolução comentada
Análise das alternativas
A “PESSOA 1” faz uma força de 10√2 N para empurrar a caixa, com um ângulo de 30° para baixo em relação à horizontal; a “PESSOA 2” faz uma força 10√3 N para puxar a caixa, com ângulo de 45° para cima em relação à horizontal. Considere que as forças e as direções não variam quando a caixa se desloca e que o atrito com o piso é desprezível, e assinale a opção que apresenta o trabalho total realizado pelas duas forças durante o deslocamento d⃗.
Assinale a opção que apresenta a função de transferência H(s) = Eo(s)/Ei(s).
Dados:
R1 = 10 kΩ;
R2 = 100 kΩ; e
C = 100 μF.
Considerando o intervalo de tempo do gráfico, assinale a opção que apresenta, respectivamente, o maior valor absoluto da corrente i(t) e o maior valor de energia armazenada no capacitor.
Um semicírculo metálico de massa m e raio R, submetido a uma aceleração da gravidade de módulo g, encontra-se pendurado pelas suas extremidades por dois suportes, conforme mostrado na figura acima. O semicírculo está submetido a um campo magnético de módulo B que atravessa perpendicularmente o seu plano no sentido indicado na figura. Determine o valor do módulo da corrente elétrica i que deve ser gerada através do semicírculo para que não haja tensão mecânica nos suportes e assinale a opção correta.
Assinale a opção que apresenta função de transferência G(s) que possui a forma correspondente ao gráfico de magnitude do diagrama de Bode acima.
Dados:
RA = 5 kΩ;
RB = 10 kΩ; e
RL = 2 kΩ.
Determine o ganho de potência em dB e assinale a opção correta.Resolução comentada
Análise das alternativas
Considere a figura acima, que mostra uma barra isolante, de comprimento L = 15 cm, com carga elétrica q = 9.10⁻¹⁵ C uniformemente distribuída. Calcule o módulo do campo elétrico, em Newton/Coulomb, produzido no ponto P, situado no eixo x, a uma distância de a = 3 cm da extremidade da barra, e assinale a opção correta.
x = 165₁₆
y = 1001011110110101₂
z = 667₁₀
Calcule os valores de r₁ = y − x, r₂ = x + z e r₃ = y − x − z, respectivamente, e assinale a opção correta.Resolução comentada
Análise das alternativas
φ(t) = 20.cos[2π.fc.t + m(t)]
Sendo m(t) = 10.sen(3.10⁵.π.t) + 15.sen(2.10⁵.π.t), assinale a opção que apresenta a potência P, o desvio de frequências Δf e a largura de banda B de m(t).Resolução comentada
Análise das alternativas
Texto-base:
Texto-base:
Texto-base:
Texto-base:
Which option completes the text below correctly?
Mark the correct option to complete the sentences below.
What is the correct option to complete the text below?
Mark the only sentence that is grammatically INCORRECT.
What is the correct option to complete the paragraph below?
What is the correct option to complete the paragraph below?
A figura abaixo mostra duas pessoas arrastando um cofre a partir do repouso, produzindo um deslocamento |d⃗| = 5 m.
Considere o circuito abaixo, que contém um amplificador operacional ideal.
Analise o capacitor C e o gráfico da sua tensão v(t) em Volts.
Examine a figura abaixo.
Examine o diagrama abaixo.
Considere o circuito abaixo.
Seja R a parte da coroa circular compreendida entre x² + y² = 1 e x² + y² = 4 no primeiro quadrante (x ≥ 0 e y ≥ 0), assinale a opção que apresenta o valor de ∬R (x² + y²).dy.dx.
Examine a figura abaixo.
Considere os números abaixo.
Um sinal m(t) modulado em ângulo com portadora fc = 100 MHz é descrito pela equação abaixo.