Questões de Concurso Público INT 2024 para Tecnologista Pleno - Avaliação de Produtos

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
Q2470789 Física
Analise a figura que corresponde à análise térmica de Calorimetria Diferencial de Varredura (DSC), para responder à questão.




Quais pontos correspondem à temperatura de cristalização e à temperatura de fusão cristalina, respectivamente? 
Alternativas
Q2470790 Física
Analise a figura que corresponde à análise térmica de Calorimetria Diferencial de Varredura (DSC), para responder à questão.




Na análise térmica de DSC, o que pode ser observado na temperatura de fusão cristalina (TM), quando estabelecido um aumento da taxa de aquecimento?
Alternativas
Q2470791 Física
Analise a figura que corresponde à análise térmica de Calorimetria Diferencial de Varredura (DSC), para responder à questão.




Na análise de DSC, a temperatura de transição vítrea (Tg) é determinada em função da mudança na posição da linha base decorrente da variação de
Alternativas
Q2470792 Engenharia Mecânica
Utilizando os conceitos relacionados à conformação por injeção de termoplásticos responda a questão.
Uma injetora semelhante à apresentada a seguir, com capacidade de injeção de 180 g, deverá ser utilizada para injetar uma peça de PEBD com peso total de moldagem de 170 g. Sabe-se que a densidade (ρB) e o fator volumétrico (VB) do polímero a ser injetado é 0,92 g/cm3 e 2,07, respectivamente, enquanto, para o polímero padrão (PS), estes valores são (ρA)1,04 g/cm3 e (VA) 2,02, respectivamente.

Imagem associada para resolução da questão



Analise as afirmativas apresentadas a seguir:

I. Será possível injetar, pois a peça tem peso menor do que a capacidade de injeção da injetora.

II. Será possível injetar, pois a capacidade de injeção da peça em PEBD é inferior à capacidade de injeção da injetora.

III. Não será possível injetar, pois a capacidade de injeção da peça em PEBD é inferior à capacidade de injeção da injetora.

IV. Não será possível injetar, pois a densidade do polímero a ser injetado é diferente do polímero padrão.


Assinale
Alternativas
Q2470793 Engenharia Mecânica
Utilizando os conceitos relacionados à conformação por injeção de termoplásticos responda a questão.
Os “rechupes” ou depressões são defeitos comumente observados em peças injetadas, principalmente em polímeros cristalinos.
Contribuem para a formação desse tipo de defeito:


I. baixa pressão de recalque;
II. alta pressão de injeção;
III. baixo tempo de recalque.



Analise os itens acima e assinale
Alternativas
Q2470794 Engenharia Mecânica
“Orientação à empresa no desenvolvimento para aplicação da identificação das embalagens conforme os requisitos da norma ABNT NBR 13230: 11/2008. Esta Norma estabelece os símbolos para identificação das resinas termoplásticas utilizadas na fabricação de embalagens e acondicionamentos plásticos, visando auxiliar na separação e posterior reciclagem dos materiais, de acordo com a sua composição.”
Com a implementação da norma na empresa, é possível:


I. atender à NBR 13230:2008 para todas as suas embalagens;

II. melhorar a satisfação dos clientes, gerando uma melhor imagem da empresa no mercado;

III. melhor organização interna das áreas de armazenamento;

IV. redução dos custos com a falta de identificação que podem causar retrabalhos, devolução e reclamação dos clientes, entre outros.



Analise os itens acima e assinale
Alternativas
Q2470795 Engenharia Mecânica
Sobre a identificação dos materiais plásticos à luz da ABNT NBR 13230:2008, relacione a segunda coluna com a primeira. 

Imagem associada para resolução da questão



Assinale a opção que apresente a relação correta entre as colunas.
Alternativas
Q2470796 Química

A figura a seguir apresenta a estrutura molecular de 4 polímeros: 


Imagem associada para resolução da questão



Assinale a opção que apresenta corretamente os nomes dos polímeros acima, respectivamente, do 1 ao 4.

Alternativas
Q2470797 Química
Os polímeros que permitem fusão por aquecimento e solidificação por resfriamento, possibilitando o seu tratamento e moldagem repetidas vezes, desde que sejam reaquecidos são denominados
Alternativas
Q2470798 Química
Na estrutura espacial da molécula a seguir são mostradas as ligações químicas entre átomos de carbono, hidrogênio e oxigênio.


Imagem associada para resolução da questão


A estrutura acima é típica de uma molécula de
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Q2470799 Química
Consiste no número de meros que compõem uma macromolécula polimérica, representado pela leta n na representação química de um polímero.

Trata-se de
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Q2470800 Química
Os polímeros em que as unidades de repetição são diferentes, ou seja, formados por mais de um monômero, geralmente são os polímeros formados por reação de policondensação. Tais polímeros são chamados de
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Q2470801 Química
A utilização de difração de raios X para determinar o grau de cristalinidade de polímeros foi intensivamente estudada durante a década de 1960, principalmente pelos trabalhos de Ruland, Farrow e Wakclin.


“W.Ruland foi o responsável pelo desenvolvimento de toda a base de cálculo necessária para a interpretação do fenômeno de espalhamento de raios X por estruturas cristalinas e a sua utilização quantitativa.”


Tais equações requerem que as seguintes condições sejam satisfeitas para sua perfeita utilização:

I. que imperfeições nos cristais sejam mínimas, ou quantificadas por outras técnicas;

II. que os cristais estejam aleatoriamente distribuídos espacialmente (sem orientação preferencial);

III. que a organização dos cristais seja tridimensional;

IV. que existam métodos que permitam separar os picos cristalinos do espalhamento amorfo, no difratograma do material.



Analise os itens acima e assinale
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Q2470802 Química
A determinação de cristalinidade de um polímero, com bons resultados, pode ser feita pelo método de Ruland, utilizando-se a equação:


Imagem associada para resolução da questão



Onde:

% C é a fração cristalina;
Ic é o resultado da integração dos picos de difração;
Ia é o resultado da integração do halo amorfo; e
K é uma constante de proporcionalidade, característica de cada polímero.

O valor de K para o policloreto de vinila (PVC) é
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Respostas
21: C
22: B
23: C
24: E
25: D
26: C
27: D
28: A
29: E
30: C
31: E
32: E
33: A
34: D
35: B
36: C
37: D
38: B
39: E
40: D