Questões de Concurso Comentadas sobre inglês
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A 4 poles pairs synchronous machine operates as a motor inside an industrial electrical network, with nominal frequency of 50,0 [Hz]. The synchronous machine rotor is equipped with short-circuited bars, creating a squirrel-cage auxiliary winding, dedicated for dumping effects during transients and also to allow the startup of the motor, when the machine is directly connected to the mains power source.
É apresentada no texto uma máquina elétricaA transformer has a primary winding circuit with 200 turns and a secondary winding circuit with 10 turns. In an ideal, lossless, transformer model, the magnetic core permeability is infinite despite the voltages applied to the windings, the two windings are perfectly coupled and there are no internal resistance in the condutors. In such transformer, when a sinusoidal voltage is applied at the secondary winding with an amplitude of 5,0 [V] RMS, the RMS voltage in the primary winding terminals is equal to 100,0 [V].
Com relação a esse texto, assinale a alternative correta.In an experiment, two point charges Q1 and Q2 were put on a straight line path, at a certain distance from each other. When both Q1 and Q2 are charged with +2,0 [mC] each, the resulting electric field intensity equals zero in the middle point in the line path between Q1 and Q2. This is true since their electric field vectors in this position have the same magnitude but opposite directions.
Com relação a esse texto, assinale a alternativa correta.In relation to the consumption of sugar, one can say, based on the text, that
According to the text,
The word “for”, in “for warmth and light bring ecological renewal to what is now an icy desert” (l.16-17), is used to introduce
Based on the article, it can be affirmed that
A afirmação a seguir apresenta alguns dos fundamentos de circuitos elétricos.
“... the algebraic sum of the voltages around any closed path in a circuit is identically zero for all time, and the algebraic sum of the currents injected in any closed surface is identically zero, also for all time ...” A afirmação indica queO texto a seguir descreve fontes de energia comumente utilizadas pela humanidade.
“... in one hand there are renewable resources, which are resources continually replenished, such as sunlight, wind, tides, waves and geothermal heat. On the other hand, there are non-renewable resources, which are resources consumed much faster than nature can generate them, such as coal, petroleum, and natural gas ...” Segundo o texto,A afirmação descreve um arranjo experimental composto por um amplificador operacional utilizado como subtrator.
“An ideal operational amplifier acting differentially as a subtractor, has an unitary gain. In this case, the output signal is given by the difference from the voltage signal connected to the negative terminal of the op-amp to the voltage signal connected to the positive one. When the voltage signal connected to the negative terminal is fifty volts (positive) and the voltage signal connected to the positive terminal is one hundred and fifty volts (negative), the output signal is two hundred volts (positive).” O texto descreve um arranjo experimental composto por um amplificador operacional na configuraçãoA afirmação descreve um equipamento elétrico empregado em sistemas elétricos de potência.
“The winding resistances of an ideal transformer are negligible, all the flux is confined to the core and the permeability of the core is infinite.” De acordo com a afirmação, um transformador ideal possui enrolamentos com resistênciaA seguinte afirmação apresenta considerações acerca do projeto de máquinas elétricas.
“There are numerous inherent shortcomings to the concept of magnetic circuits, except for the fact that it is the easiest design tool available for calculating fluxes in practical machinery design. Although the use of Maxwell’s equations produces exact results, this method demands considerable effort and does not present significant benefits, when compared to the results produced by the magnetic circuits’ method.” Assinale a alternativa que melhor descreve a afirmação.Um antônimo para a palavra biggest é
De acordo com o texto, o Word 2007
Leia o texto para responder à questão.
Brazil’s Average Unemployment Rate Falls to Record Low in 2012
By Dow Jones Business News
January 31, 2013
Brazil’s unemployment rate for 2012 fell to 5.5%, down from the previous record low of 6.0% recorded last year, the Brazilian Institute of Geography and Statistics, or IBGE, said Thursday. In December, unemployment fell to 4.6% compared with 4.9% in November, besting the previous record monthly low of 4.7% registered in December 2011, the IBGE said.
The 2012 average unemployment rate was in line with the 5.5% median estimate of economists polled by the local Estado news agency. Analysts had also pegged December’s unemployment rate at 4.4%.
Brazil’s unemployment rate remains at historically low levels despite sluggish economic activity. Salaries have also been on the upswing in an ominous sign for inflation – a key area of concern for the Brazilian Central Bank after a series of interest rate cuts brought local interest rates to record lows last year. Inflation ended 2012 at 5.84%.
The average monthly Brazilian salary retreated slightly to 1,805.00 Brazilian reais ($908.45) in December, down from the record high BRL1,809.60 registered in November, the IBGE said. Wages trended higher in 2012 as employee groups called on Brazilian companies and the government to increase wages and benefits to counter higher local prices. Companies were also forced to pay more to hire and retain workers because of the country’s low unemployment.
The IBGE measures unemployment in six of Brazil’s largest metropolitan areas, including São Paulo, Rio de Janeiro, Salvador, Belo Horizonte, Recife and Porto Alegre. Brazil’s unemployment rate, however, is not fully comparable to jobless rates in developed countries as a large portion of the population is either underemployed or works informally without paying taxes. In addition, workers not actively seeking a job in the month before the survey don’t count as unemployed under the IBGE’s methodology. The survey also doesn’t take into account farm workers.
(www.nasdaq.com. Adaptado)
No trecho do quinto parágrafo – Brazil’s unemployment rate, however, is not fully comparable to jobless rates in developed countries as a large portion of the population is either underemployed or works informally – a palavra as pode ser substituída, sem alteração de sentido, por
Leia o texto para responder à questão.
Brazil’s Average Unemployment Rate Falls to Record Low in 2012
By Dow Jones Business News
January 31, 2013
Brazil’s unemployment rate for 2012 fell to 5.5%, down from the previous record low of 6.0% recorded last year, the Brazilian Institute of Geography and Statistics, or IBGE, said Thursday. In December, unemployment fell to 4.6% compared with 4.9% in November, besting the previous record monthly low of 4.7% registered in December 2011, the IBGE said.
The 2012 average unemployment rate was in line with the 5.5% median estimate of economists polled by the local Estado news agency. Analysts had also pegged December’s unemployment rate at 4.4%.
Brazil’s unemployment rate remains at historically low levels despite sluggish economic activity. Salaries have also been on the upswing in an ominous sign for inflation – a key area of concern for the Brazilian Central Bank after a series of interest rate cuts brought local interest rates to record lows last year. Inflation ended 2012 at 5.84%.
The average monthly Brazilian salary retreated slightly to 1,805.00 Brazilian reais ($908.45) in December, down from the record high BRL1,809.60 registered in November, the IBGE said. Wages trended higher in 2012 as employee groups called on Brazilian companies and the government to increase wages and benefits to counter higher local prices. Companies were also forced to pay more to hire and retain workers because of the country’s low unemployment.
The IBGE measures unemployment in six of Brazil’s largest metropolitan areas, including São Paulo, Rio de Janeiro, Salvador, Belo Horizonte, Recife and Porto Alegre. Brazil’s unemployment rate, however, is not fully comparable to jobless rates in developed countries as a large portion of the population is either underemployed or works informally without paying taxes. In addition, workers not actively seeking a job in the month before the survey don’t count as unemployed under the IBGE’s methodology. The survey also doesn’t take into account farm workers.
(www.nasdaq.com. Adaptado)
No trecho do quarto parágrafo – Companies were also forced to pay more to hire and retain workers because of the country’s low unemployment. – because introduz uma
Judge the following item according to the text above.
The author uses engineering as an instance of specialization of
a field of knowledge in order to support his argument.
Judge the following item according to the text above.
According to the text, specialization arises from the need to
prevent certain dimensions of a field from becoming obsolete
after they had been recognized as established or traditional
areas.
According to the text above, judge the next item.
The text claims that engineers are as much responsible for the reduction of risks in modern society as any other professional, because they “cannot bear the total blame” (l.3).
