Questões de Concurso Público INT 2024 para Tecnologista Pleno - Corrosão e Proteção

Foram encontradas 51 questões

Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467198 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
In the sentence, “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached”, the word in bold type cannot be substituted for
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467199 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
Choose the alternative that better substitutes the underlined preposition in “On Saturday, X’s global government affairs team posted that it had been ‘forced by court decisions to block certain popular accounts in Brazil’ and threatened with ‘daily fines’ for noncompliance”. 
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467200 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
From the sentence “Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States”, it is possible to say that
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467201 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
In “As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit”, it is not possible to say that Musk
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467202 Inglês
Choose the best alternative: “People have changed to virtual political protests, _____?” 
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467203 Inglês
Choose the best alternative: “Brazilians’ sense of belief in institutions _____ .”
Alternativas
Q2472834 Química
Quanto à espectroscopia no infravermelho, assinale a alternativa correta.
Alternativas
Q2472835 Química
Quanto aos inibidores de corrosão para ambientes de CO2 e H2S, e quanto à técnica de espectroscopia no infravermelho, assinale a afirmativa incorreta.
Alternativas
Q2472836 Química
Considere a seguinte situação hipotética:

Um pesquisador deseja avaliar derivados da estrutura química abaixo indicada como inibidor de corrosão para meio de CO2 e H2S. O pesquisador precisa confirmar as estruturas químicas almejadas e pretende empregar técnicas de caracterização como a espectroscopia no infravermelho. Destaca-se que em cada caso, outras bandas aparecerão no espectro, porém apenas as bandas mencionadas em cada alternativa devem ser correlacionadas com a posição no espectro. Com base nessa situação, assinale a afirmativa incorreta quanto à correlação do tipo de banda e sua posição no espectro.


Imagem associada para resolução da questão
Alternativas
Q2472837 Química
Quanto à estrutura química e à adsorção dos inibidores de corrosão, assinale a alternativa correta.
Alternativas
Q2472838 Química
Quanto aos ensaios empregados para avaliar a eficiência de inibidores de corrosão, tem-se os ensaios de imersão no meio a ser estudado, baseados em perda de massa do material metálico. Assinale a alternativa correta.
Alternativas
Q2472839 Química
Em ambientes de alta agressividade aos materiais metálicos, pode ser indicado o uso de ligas resistentes à corrosão. Entretanto, mesmo em ligas resistentes, é possível a ocorrência de crévice, que pode ser avaliado por teste padronizado em laboratório, conforme descrito na norma ASTM G192. Com relação a esse ensaio são feitas as seguintes afirmativas:

I. Na primeira etapa do teste, a amostra metálica deve ser polarizada anodicamente de forma galvanostática para surgimento do crévice.

II. Durante o ensaio são aplicadas duas diferentes técnicas de polarização: galvanostática e potenciostática.

III. O potencial de repassivação é definido como aquele em que a corrente aumenta continuamente em função do tempo.

Está(ão) correta(s) a(s) afirmativa(s)
Alternativas
Q2472840 Química
Dentre os métodos de avaliação da susceptibilidade à corrosão localizada, cita-se a determinação da temperatura crítica de pite, descrita na norma ASTM G150. Com relação às análises realizadas para avaliação de corrosão localizada, são feitas as seguintes afirmações:

I. A temperatura crítica de pite é definida como a temperatura em que a corrente excede 100 microA/cm2 por 60s.

II. A temperatura crítica de pite é obtida através de técnica potenciodinâmica.

III. Em geral, o potencial crítico de pite diminui com o aumento da temperatura.


Dentre essas afirmativas, está(ão) correta(s)
Alternativas
Q2472841 Química
Várias técnicas são aplicadas para avaliação de inibidores de corrosão, dentre as quais cita-se o jato impingidor (“jet impingement”), que permite avaliar a eficiência do inibidor em condição hidrodinâmica. Dentre as opções abaixo, assinale a afirmativa incorreta em relação aos procedimentos e detalhamento dessa técnica.
Alternativas
Q2472842 Química
Dentre os métodos de proteção contra a corrosão, destacam-se os filmes protetores que podem ser obtidos por diferentes técnicas como, por exemplo, deposição eletroforética (EPD). Sobre essa técnica e seus parâmetros, assinale a afirmativa incorreta.
Alternativas
Q2472843 Química
As sondas de Resistência Elétrica (RE), possuem dois elementos sensores: um protegido do meio corrosivo (interior da sonda) e outro que fica exposto ao meio corrosivo. Nessa técnica, a variação da RE ocorre em função do decréscimo de espessura, promovida pela corrosão, em função do tempo de exposição ao ambiente.

Assinale a opção que contém a afirmação incorreta sobre o método de RE.
Alternativas
Q2472844 Química
Diversos solventes, usados na preparação de revestimentos anticorrosivos, possuem na sua composição substâncias com ligação O-H. Na figura a seguir, são mostradas partes dos espectros de FTIR com as regiões do estiramento O-H de um álcool (líquido puro, placas de KBr), ilustrando uma mudança no espectro.

Imagem associada para resolução da questão



Sobre a figura, são feitas as seguintes afirmativas:

I. A banda de estiramento O-H com ligação intermolecular de hidrogênio, está na faixa entre 3400 e 3300 cm-1;

II. Analisando os espectros de (A) para (C), fica evidenciado que a amostra foi diluída,

III. Ligações intermoleculares de hidrogênio fortalecem a ligação OH e deslocam a banda para uma frequência mais alta.

Assinale
Alternativas
Q2472845 Química
Em um estudo de caso realizado em uma refinaria de petróleo, foi testado um inibidor de corrosão para proteger as tubulações metálicas contra a corrosão. O inibidor elevou o potencial de corrosão em 42 mV. As inclinações anódica e catódica, medidas antes da aplicação do inibidor, eram respectivamente 64 mV/década e -126 mV/década. Após a adição do inibidor, observou-se que essas inclinações não foram alteradas. Com base nestas informações, avalie as afirmativas a seguir:

I. Sendo requisito uma eficiência de inibição a partir de 80%, esse inibidor pode ser usado.

II. O inibidor testado pode ser considerado um inibidor anódico.

III. Para serem válidas as medidas das inclinações das curvas de polarização, estas devem ser obtidas sob baixa variação de potencial.


Estão corretas as afirmativas
Alternativas
Q2472846 Química
As curvas de polarização são usadas para avaliar o comportamento eletroquímico de um metal/liga em um eletrólito. Assim, a sua interpretação é fundamental para entender o que está acontecendo com um ou mais pares galvânicos.

Assinale a opção que melhor explica o comportamento de um par galvânico, em presença de íons cloreto, representado pela figura a seguir:

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Alternativas
Q2472847 Química
Com relação ao mecanismo de corrosão pelo CO2, assinale a afirmativa incorreta.
Alternativas
Respostas
21: C
22: B
23: C
24: E
25: D
26: C
27: C
28: A
29: B
30: C
31: C
32: B
33: C
34: A
35: B
36: C
37: A
38: C
39: B
40: C