Questões de Concurso Público INT 2024 para Tecnologista Pleno - Tecnologia de Materiais Poliméricos

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
Q2474313 Química
Um fluido polimérico é disperso em uma superfície e, após o cisalhamento, o material flui na superfície, porém não retorna à sua condição inicial. Qual das alternativas abaixo explica o comportamento observado?
Alternativas
Q2474314 Engenharia Mecânica
Um tecnologista inicia o processo de injeção de polipropileno; as peças apresentam depressões na superfície da peça. Qual é o nome do problema? E que alteração no processo é necessária para resolver esse problema?
Alternativas
Q2474315 Química
Assinale a opção que indica em ordem borracha, plástico de engenharia, elastômero termoplástico e termorrígido. 
Alternativas
Q2474316 Química
Um polímero desconhecido foi encaminhado para análise no Instituto. O espectro de FTIR apresenta banda forte em 2930 e 2850 cm-1, 2200 cm-1, 1430 cm-1 e 962 cm-1. A Tg amostra desconhecida foi de – 40°C. Após ensaio de resistência à tração foi observado baixo módulo elástico. Compilando as informações conclui-se que o polímero desconhecido era 
Alternativas
Q2474317 Química
Polímeros são macromoléculas compostas pela união de várias moléculas pequenas, denominadas de monômeros. Os monômeros são moléculas de pouca massa, formadas por meio de reações de adição ou condensação. O termo polímero vem da união de duas palavras gregas: “poli” e “mero”. "Poli" significa muitas e “mero” significa partes. A estrutura de uma macromolécula apresenta muitas partes (meros) de monômeros, chamado de grau de polimerização.

Nas alternativas a seguir, estão listadas vantagens dos polímeros, à exceção de uma. Assinale-a.
Alternativas
Q2474318 Química
Dentre as opções apresentadas, marque aquela que não apresenta um polímero.
Alternativas
Q2474319 Química
Com relação aos polímeros, são feitas as afirmações a seguir:

I. Grau de polimerização (GP) de um polímero é o número de ligações existentes ente cada uma das unidades de repetição (meros) presentes na macromolécula.

II. O Grau de polimerização (GP) pode ser obtido por meio da razão entre a número de ligações moleculares do polímero e a o número de ligações moleculares do mero (GP = MMpolímero / MMmero).

III. Polimerização é o nome dado ao processo de conversão de um monômero ou de uma mistura de monômeros em um polímero

Assinale
Alternativas
Q2474320 Química
Assinale a afirmativa incorreta.
Alternativas
Q2474321 Química
Os polímeros sintéticos são obtidos por meio de um processo que recebe o nome de polimerização. A polimerização é a síntese do material, na qual os monômeros reagem entre si, unindo-se uns aos outros, de modo a formarem a macromolécula polimérica. A respeito da polimerização, assinale a afirmativa incorreta.
Alternativas
Q2474322 Química
A necessidade de obtenção de polímeros cada vez mais isentos de impurezas leva ao desenvolvimento de diversas técnicas de polimerização. São técnicas empregadas para a polimerização, exceto
Alternativas
Q2474323 Química
Sobre a RMN (Ressonância Magnética Nuclear), assinale a alternativa correta.
Alternativas
Q2474324 Química
Os polímeros possuem características de comportamento mecânico que os diferem de materiais como o aço (sólidos com comportamento segundo a lei de Hook). Com relação ao comportamento mecânico de elastômeros e polímeros, assinale a alternativa correta.
Alternativas
Q2474325 Química
O processo de degradação de polímeros consiste de modificações físicas e químicas na estrutura dos polímeros que levam à gradativa perda de suas propriedades. Sobre esse processo são feitas as afirmativas abaixo:

I. Reações químicas que ocorrem no início e durante a degradação: cisão (ou quebra) de ligações na cadeia principal ou em grupos laterais, reticulação, eliminação ou substituição de cadeias laterais, reações intramoleculares, auto-oxidação e despolimerização.

II. As reações químicas têm seu início provado por exposição térmica, fotoquímica, mecânica, radiação de alta energia, química.

III. Por condições físicas, como perda de aditivos como plastificante e colorantes.


Assinale
Alternativas
Q2474326 Química
Os polímeros podem ser trabalhados em diversos processos de transformação, tais como extrusão, injeção, sopro, entre outros. Marque a opção correspondente ao polímero que pode ser trabalhado em processo de injeção a quente.
Alternativas
Respostas
21: C
22: B
23: C
24: E
25: D
26: C
27: D
28: E
29: B
30: A
31: D
32: C
33: B
34: D
35: B
36: E
37: A
38: B
39: E
40: D