Foram encontradas 40 questões.
Um pistão hidráulico com diâmetro de 50 mm e curso de 120 mm trabalha com uma pressão variável, cujo valor máximo é de 1 Mpa. O retorno do pistão é feito por uma mola de compressão de aço SAE 10 65 temperado em óleo. Diante do exposto, é correto afirmar que a força atuante será de
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A corrosão pode ocorrer sob diferentes formas, e conhecê-las é muito importante para o estudo dos processos corrosivos. Tais formas podem ser apresentadas, considerando a aparência ou forma de ataque e as diferentes causas da corrosão e seus mecanismos. Qual tipo de corrosão ocorre por aeração diferencial, eletrolítica ou por correntes de fuga, galvânica, associada às solicitações mecânicas, em torno do cordão de solda, seletiva, empolamento ou fragilização pelo hidrogênio?
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A água escoa em regime permanente através do tubo de Venturi, conforme a figura a seguir. Considere que as perdas são desprezíveis. A área da seção (1) é de 20 cm² e a da seção (2), 10 cm². Verifica-se, ainda, que um manômetro de mercúrio foi instalado entre as seções (1) e (2) e ocorre um desnível.
Com base nos dados apresentados, determine a vazão de água que escoa pelo tubo.
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Em uma certa turbina, parte da sua pá, conforme mostra a figura, indica que o fluxo térmico para a mesma é de q’’ = 95.000 W/m². Para manter uma temperatura superficial em regime estacionário de 800°C, o calor transferido para a lâmina é removido por uma substância refrigerante que circula pelo interior da pá.
Com base nas informações apresentadas, é correto afirmar que se a temperatura superficial for reduzida para Ts,1 = 700°C através do aumento da vazão do refrigerante, o fluxo térmico na pá, em W/m², será de
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Os materiais necessitam ser processados para atingir as especificações que o engenheiro requer para o produto projetado. As etapas de um processamento mais familiar simplesmente mudam a forma da matéria. Analise a alternativa que indica esses processos.
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Em ambientes climatizados com capacidade de climatização acima de 60.000 BTU/h ou 5 TR, o Ministério da Saúde tornou obrigatório, através da Portaria nº 3.523/98, implementar e manter disponível no imóvel um
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“The World Bank Group is committed to achieving diversity…” means that
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The World Bank will accept applications
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Has Brazil blown it?
Four years ago this newspaper put on its cover a picture of the statue of Christ the Redeemer ascending like a rocket from Rio de Janeiro’s Corcovado mountain, under the rubric “Brazil takes off”. The economy, having stabilised under Fernando Henrique Cardoso in the mid-1990s, accelerated under Luiz Inácio Lula da Silva in the early 2000s. It barely stumbled after the Lehman collapse in 2008 and in 2010 grew by 7.5%, its strongest performance in a quarter-century. To add to the magic, Brazil was awarded both next year’s football World Cup and the summer 2016 Olympics. On the strength of all that, Lula persuaded voters in the same year to choose as president his technocratic protégée, Dilma Rousseff.
Since then the country has come back down to earth with a bump. In 2012 the economy grew by 0.9%. Hundreds of thousands took to the streets in June in the biggest protests for a generation, complaining of high living costs, poor public services and the greed and corruption of politicians. Many have now lost faith in the idea that their country was headed for orbit and diagnosed just another voo de galinha (chicken flight), as they dubbed previous short-lived economic spurts.
There are excuses for the deceleration. All emerging economies have slowed. Some of the impulses behind BraziI’s previous boom-the pay-off from ending runaway inflation and opening up to trade, commodity price rises, big increases in credit and consumption-have played themselves out. And many of Lula’s policies, notably the Bolsa Família that helped lift 25m people out of poverty, were admirable.
But Brazil has done far too little to reform its government in the boom years. It is not alone in this: India had a similar chance, and missed it. But Brazil’s public sector imposes a particularly heavy burden on its private sector, as our special report explains. Companies face the world’s most burdensome tax code, payroll taxes add 58% to salaries and the government has got its spending priorities upside down.
Fortunately, Brazil has great strengths. Thanks to its efficient and entrepreneurial farmers, it is the world’s third-biggest food exporter. Even if the government has made the process slower and costlier than it needed to be, Brazil will be a big oil exporter by 2020. It has several manufacturing jewels, and is developing a world-class research base in biotechnology, genetic sciences and deep-sea oil and gas technology. The consumer brands that have grown along with the country’s expanding middle class are ready to go abroad. Despite the recent protests, it does not have the social or ethnic divisions that blight other emerging economies, such as India or Turkey.
(The Economist. September 4th, 2013. p. 11. Adapted.)
In “Even if the government has made... exporter by 2020.” (5º§) EVEN IF means
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Has Brazil blown it?
Four years ago this newspaper put on its cover a picture of the statue of Christ the Redeemer ascending like a rocket from Rio de Janeiro’s Corcovado mountain, under the rubric “Brazil takes off”. The economy, having stabilised under Fernando Henrique Cardoso in the mid-1990s, accelerated under Luiz Inácio Lula da Silva in the early 2000s. It barely stumbled after the Lehman collapse in 2008 and in 2010 grew by 7.5%, its strongest performance in a quarter-century. To add to the magic, Brazil was awarded both next year’s football World Cup and the summer 2016 Olympics. On the strength of all that, Lula persuaded voters in the same year to choose as president his technocratic protégée, Dilma Rousseff.
Since then the country has come back down to earth with a bump. In 2012 the economy grew by 0.9%. Hundreds of thousands took to the streets in June in the biggest protests for a generation, complaining of high living costs, poor public services and the greed and corruption of politicians. Many have now lost faith in the idea that their country was headed for orbit and diagnosed just another voo de galinha (chicken flight), as they dubbed previous short-lived economic spurts.
There are excuses for the deceleration. All emerging economies have slowed. Some of the impulses behind BraziI’s previous boom-the pay-off from ending runaway inflation and opening up to trade, commodity price rises, big increases in credit and consumption-have played themselves out. And many of Lula’s policies, notably the Bolsa Família that helped lift 25m people out of poverty, were admirable.
But Brazil has done far too little to reform its government in the boom years. It is not alone in this: India had a similar chance, and missed it. But Brazil’s public sector imposes a particularly heavy burden on its private sector, as our special report explains. Companies face the world’s most burdensome tax code, payroll taxes add 58% to salaries and the government has got its spending priorities upside down.
Fortunately, Brazil has great strengths. Thanks to its efficient and entrepreneurial farmers, it is the world’s third-biggest food exporter. Even if the government has made the process slower and costlier than it needed to be, Brazil will be a big oil exporter by 2020. It has several manufacturing jewels, and is developing a world-class research base in biotechnology, genetic sciences and deep-sea oil and gas technology. The consumer brands that have grown along with the country’s expanding middle class are ready to go abroad. Despite the recent protests, it does not have the social or ethnic divisions that blight other emerging economies, such as India or Turkey.
(The Economist. September 4th, 2013. p. 11. Adapted.)
In 2008 Brazilian economy
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