Questões de Concurso Comentadas para técnico - elétrica

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Q2768654 Eletricidade
Uma instalação industrial tem fator de potência 0,80. Pretende-se melhorar o fator de potência instalando banco de capacitores, de modo que o fator de potência se eleve para 0,95. A redução das perdas graças aos capacitores é de:
Alternativas
Q2768644 Eletricidade
Sobre tomadas de uso geral e específico, analise as afirmativas a seguir:

1. TUG’s são usadas para alimentar aparelhos cuja corrente nominal é inferior a 10A.

2. TUE’s são usadas para alimentar de modo exclusivo ou dedicado aparelhos cuja corrente nominal é superior a 10 A.

3. A potência de cada ponto TUG depende do cômodo. Em banheiros, cozinhas, copas, áreas de serviços: 600 VA, até 3 pontos e 100 VA por ponto excedente.

4. O número de tomadas nas cozinhas, copas, áreas de serviços e afins deve se, no mínimo, 1 tomada para cada 3,5 m, com exceção das bancadas.

Estão corretas:
Alternativas
Q2768635 Eletricidade
A carga do acumulador elétrico é o processo pelo qual há recuperação das substâncias dos seus eletrodos, obtida por uma corrente elétrica adequada aplicada entre eles. O tipo de carga que fornece ao acumulador a energia elétrica necessária para manter o seu estado de plena carga, compensando as suas perdas internas por autodescarga, é denominado carga de:
Alternativas
Q2768630 Eletricidade
Conforme a NR-10, do Ministério do Trabalho e Emprego, a tensão superior a 1000 V é considerada:
Alternativas
Q2768629 Eletricidade
Um capacitor de placas planas e paralelas de 25 cm² cada apresenta espessura do dielétrico (papel) de 3 mm. Sendo k PAPEL = 2,5 e k AR = 8,85 X 10-12 , a capacitância desse capacitor vale:
Alternativas
Q2746793 Noções de Informática
No uso dos recursos dos softwares de correio eletrônico, se um usuário inserir o e-mail de um destinatário no campo da mensagem, uma cópia da mensagem será enviada para o destinatário e podem ocorrer duas situações, caracterizadas a seguir.

I - o nome do destinatário não será visto pelos outros destinatários da mensagem.

II - O nome do destinatário será visto pelos outros destinatários da mensagem.

Os espaços da mensagem caracterizados por I e II são referenciados, respectivamente, por:
Alternativas
Q2746792 Noções de Informática
A navegação em sites na internet é realizada por meio de browsers, sendo o Google Chrome um dos mais utilizados. Um indicativo de que um site está sendo acessado em modo seguro, é visualizado na barra de endereços, exemplificado na seguinte alternativa:
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Q2746791 Noções de Informática
No que diz respeito aos conceitos básicos para configuração e verificação de redes, um serviço possibilita a um servidor, ou mesmo a um roteador wireless, distribuir automaticamente, e de forma dinâmica, endereços IP diferentes a todos os computadores, à medida que eles fazem a solicitação de conexão com a rede. Esse serviço é conhecido pela sigla:
Alternativas
Q2746790 Noções de Informática
O MSOffice Word 2010 BR disponibiliza dois ícones para uso na digitação de textos, o primeiro permite inserir caixas de texto pré-formatadas, e o segundo aplicar alinhamento justificado. Esses ícones são respectivamente:
Alternativas
Q2746788 Noções de Informática
Atualmente, os microcomputadores têm sido comercializados com discos rígidos cujas capacidades de armazenamento são suficientes para os trabalhos diários executados. Um valor bastante comum para a capacidade máxima e a tecnologia empregada nesses discos são, respectivamente:
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Q2746787 Inglês
not valid statement found
“as” in “as development proceeds” is used in the same way as in:
Alternativas
Q2746782 Inglês

Is gas and oil drilling mostly computerized? 


  


How much do you know about gas and oil drilling?


From locating new reserves to analyzing crude as it's refined, the oil and gas industry utilizes computer technology at every step of the way. Indeed, as proven reserves have dried up and new sources of oil and gas have become harder to find and exploit, computers have taken an increasingly important role in the industry.


That said, humans continue to be an essential part of the process. Though data may be collected and analyzed by a computer, it is a human, ultimately, that interprets the results and makes a decision to drill or move on. Though computers control the speed, force, and depth of a drill, it is a human that monitors and modifies the variables. And, of course, it is a human that makes the dangerous connections between drill pipes as the well pushes deeper.


Indeed, though computers have made drilling for oil and gas a safer and more efficient process, it remains a handson industry.


(adaptedfrom http://science.howstuffworks.com/environmental/energy/gas-oildrilling-computerized.htm)

Indeed in “Indeed …it remains a hands-on industry.” introduces a(n):
Alternativas
Q2746781 Inglês

Is gas and oil drilling mostly computerized? 


  


How much do you know about gas and oil drilling?


From locating new reserves to analyzing crude as it's refined, the oil and gas industry utilizes computer technology at every step of the way. Indeed, as proven reserves have dried up and new sources of oil and gas have become harder to find and exploit, computers have taken an increasingly important role in the industry.


That said, humans continue to be an essential part of the process. Though data may be collected and analyzed by a computer, it is a human, ultimately, that interprets the results and makes a decision to drill or move on. Though computers control the speed, force, and depth of a drill, it is a human that monitors and modifies the variables. And, of course, it is a human that makes the dangerous connections between drill pipes as the well pushes deeper.


Indeed, though computers have made drilling for oil and gas a safer and more efficient process, it remains a handson industry.


(adaptedfrom http://science.howstuffworks.com/environmental/energy/gas-oildrilling-computerized.htm)

The word “force” in “the speed, force, and depth of a drill,” is to “forceful” as:
Alternativas
Q2746780 Inglês

Is gas and oil drilling mostly computerized? 


  


How much do you know about gas and oil drilling?


From locating new reserves to analyzing crude as it's refined, the oil and gas industry utilizes computer technology at every step of the way. Indeed, as proven reserves have dried up and new sources of oil and gas have become harder to find and exploit, computers have taken an increasingly important role in the industry.


That said, humans continue to be an essential part of the process. Though data may be collected and analyzed by a computer, it is a human, ultimately, that interprets the results and makes a decision to drill or move on. Though computers control the speed, force, and depth of a drill, it is a human that monitors and modifies the variables. And, of course, it is a human that makes the dangerous connections between drill pipes as the well pushes deeper.


Indeed, though computers have made drilling for oil and gas a safer and more efficient process, it remains a handson industry.


(adaptedfrom http://science.howstuffworks.com/environmental/energy/gas-oildrilling-computerized.htm)

The main idea implied in the final sentence is that:
Alternativas
Q2746779 Inglês

Is gas and oil drilling mostly computerized? 


  


How much do you know about gas and oil drilling?


From locating new reserves to analyzing crude as it's refined, the oil and gas industry utilizes computer technology at every step of the way. Indeed, as proven reserves have dried up and new sources of oil and gas have become harder to find and exploit, computers have taken an increasingly important role in the industry.


That said, humans continue to be an essential part of the process. Though data may be collected and analyzed by a computer, it is a human, ultimately, that interprets the results and makes a decision to drill or move on. Though computers control the speed, force, and depth of a drill, it is a human that monitors and modifies the variables. And, of course, it is a human that makes the dangerous connections between drill pipes as the well pushes deeper.


Indeed, though computers have made drilling for oil and gas a safer and more efficient process, it remains a handson industry.


(adaptedfrom http://science.howstuffworks.com/environmental/energy/gas-oildrilling-computerized.htm)

When the author states that “proven reserves have dried up” he means that these reserves have:
Alternativas
Q2746778 Inglês

Is gas and oil drilling mostly computerized? 


  


How much do you know about gas and oil drilling?


From locating new reserves to analyzing crude as it's refined, the oil and gas industry utilizes computer technology at every step of the way. Indeed, as proven reserves have dried up and new sources of oil and gas have become harder to find and exploit, computers have taken an increasingly important role in the industry.


That said, humans continue to be an essential part of the process. Though data may be collected and analyzed by a computer, it is a human, ultimately, that interprets the results and makes a decision to drill or move on. Though computers control the speed, force, and depth of a drill, it is a human that monitors and modifies the variables. And, of course, it is a human that makes the dangerous connections between drill pipes as the well pushes deeper.


Indeed, though computers have made drilling for oil and gas a safer and more efficient process, it remains a handson industry.


(adaptedfrom http://science.howstuffworks.com/environmental/energy/gas-oildrilling-computerized.htm)

According to the text, the use that oil and gas industry makes of computers is:
Alternativas
Respostas
261: A
262: D
263: C
264: B
265: B
266: B
267: D
268: C
269: A
270: E
271: A
272: B
273: B
274: D
275: C
276: E
277: B
278: A
279: E
280: D