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Q257468 Engenharia Eletrônica


Com base nessas informações, julgue os seguintes itens.

Se a palavra binária A3A2A1A0 for incrementada a cada ciclo de um relógio, contando de 0000 a 1111 em passos de 1, o sinal analógico obtido na saída do conversor (Vsaída) será contínuo no tempo e contínuo em amplitude, com valores entre 0 e 15 V.

Alternativas
Q257467 Engenharia Eletrônica


Com base nessas informações, julgue os seguintes itens.

O valor de resistência de Ry é igual a 2Rx.

Alternativas
Q257465 Engenharia Eletrônica


Considerando que, no circuito digital da figura acima, o estado inicial do sistema seja Q1 = 0 e Q0 = 0, julgue os itens seguintes.

Se A = 1, então, após um ciclo completo do relógio, o estado do sistema será Q1 = 1 e Q0 = 1.

Alternativas
Q257464 Engenharia Eletrônica
Imagem 009.jpg

Com base na tabela, julgue os itens de 13 a 15.

Se o circuito analógico apresentado na figura abaixo – no qual o diodo é ideal e v0(t) = 4,6 × cos(120Imagem 010.jpg × t) V – for usado para alimentar o circuito digital TTL em questão, este funcionará corretamente.

Imagem associada para resolução da questão


Alternativas
Q257463 Engenharia Eletrônica
Imagem 009.jpg

Com base na tabela, julgue os itens de 13 a 15.

No circuito, a margem de ruído para o estado alto é superior a 1,5 V.

Alternativas
Q257462 Engenharia Eletrônica
Imagem 009.jpg

Com base na tabela, julgue os itens de 13 a 15.

A margem de ruído para o estado baixo é inferior a 0,5 V

Alternativas
Q257461 Engenharia Eletrônica
Imagem 007.jpg

Considerando que, no circuito da figura acima, o amplificador operacional seja ideal, julgue o item a seguir.

Se R3 = R1 e R4 = R2, então v x (t) = Imagem 008.jpg [ v1 ( t ) - v 2 ( t ) ].

Alternativas
Q257460 Engenharia Elétrica
Imagem 006.jpg

As impedâncias dos circuitos aberto de entrada e de saída do quadripolo são, respectivamente, iguais a Imagem associada para resolução da questão
Alternativas
Q257459 Engenharia Elétrica
Se I0 é a representação fasorial da corrente de entrada i0(t), então I0 = (1 + j4ω) -1 V0.

Alternativas
Q257458 Engenharia Elétrica
A impedância equivalente vista pela fonte (isto é, entre os terminais A e B) é igual a (2 + j2ω) × (1 + j4ω) -1Ω.
Alternativas
Q257457 Engenharia Elétrica
Se Vx é a representação fasorial da tensão de saída vx(t), então Vx = (2 + j2ω) -1 V0.


Alternativas
Q257455 Engenharia Elétrica
Figuras para os itens de 02 a 07

Imagem 001.jpg

No circuito ilustrado na figura I,


A respeito dos circuitos ilustrados nas figuras I, II e III, julgue os seguintes itens.

Se, nas figuras II e III, Ry = Rz, Vy = Vz e Iy = Iz, então Ra = Rb.

Alternativas
Q257454 Engenharia Elétrica
Figuras para os itens de 02 a 07

Imagem 001.jpg

No circuito ilustrado na figura I,


Imagem 002.jpg

Alternativas
Q257453 Engenharia Elétrica
Figuras para os itens de 02 a 07

Imagem 001.jpg

No circuito ilustrado na figura I,


R2 × (Ix + I1 + I0) + (R3 + Rx) × Ix = 0.

Alternativas
Q257451 Engenharia Elétrica
Figuras para os itens de 02 a 07

Imagem 001.jpg

No circuito ilustrado na figura I,


I0 + I1 - I2 - Ix = 0.

Alternativas
Q257450 Engenharia Elétrica
A respeito de elementos de circuitos, julgue o item abaixo.

A troca da resistência de um chuveiro elétrico por outra de maior valor é uma maneira adequada e suficiente para esquentar com mais intensidade uma determinada quantidade de água sem a necessidade de alterar o valor da tensão elétrica de alimentação.

Alternativas
Q252461 Inglês
                                   Safety Meeting Presentation

  Today's meeting is really about you. I can stand in front of you and talk about working safely and what procedures to follow until I'm blue in the face. But until you understand the need for working safely, until you are willing to be responsible for your safety, it doesn't mean a whole lot.
   Some of you may be familiar with OSHA - the Occupational Safety & Health Administration. The sole purpose of this agency is to keep American workers safe. Complying with OSHA regulations isn't always easy, but if we work together, we can do it. Yet, complying with regulations is not the real reason for working safely. Our real motive is simple. We care about each and every one of you and will do what is necessary to prevent you from being injured.
   However, keeping our workplace safe takes input from everyone. Management, supervisor, and all of you have to come together on this issue, or we're in trouble. For example, upper management has to approve the purchase of safe equipment. Supervisors, including myself, have to ensure that each of you knows how to use that equipment safely. Then it's up to you to follow through the task and use the equipment as you were trained. If any one part of this chain fails, accidents are going to happen and people are going to get hurt.

Responsibility Number One - Recognize Hazards
   At the core of your safety responsibilities lies the task of recognizing safety and health hazards. In order to do that, you must first understand what constitutes a hazard. Extreme hazards are often obvious. Our hopes are that you won't find too many of those around here.
   There are, however, more subtle hazards that won't jump up and bite you. As a result of your safety training and meetings like these, some things may come to mind. For example, a machine may not be easy to lock out. Common practice may be to use a tag. This is a potential hazard and should be discussed. Maybe something can be changed to make it easier to use a lock. Other subtle hazards include such things as frayed electrical cords, a loose machine guard, a cluttered aisle, or maybe something that just doesn't look right.

Responsibility Number Two - Report Hazards
    A big part of recognizing hazards is using your instincts. Nobody knows your job as well as you do, so we're counting on you to let us know about possible problems. Beyond recognizing hazards, you have to correct them or report them to someone who can. This too, is a judgement call. For example, if something spills in your work area you can probably clean it up yourself. However, if there is an unlabeled chemical container and you have no idea what it is, you should report it to your supervisor.

Additional Employee Responsibilities
   Good housekeeping is a major part of keeping your work area safe. For example, you should take a few minutes each day to ensure that aisles, hallways, and stairways in your work area are not obstructed. If boxes, equipment, or anything else is left to pile up, you have a tripping hazard on your hands. Those obstructions could keep you from exiting the building quickly and safely should you face an emergency situation.
   Also watch out for spills. These can lead to slips and falls. Flammable materials are another thing to be aware of. Make sure they are disposed of properly.
   Keep Thinking. Even if you're doing your job safely and you are avoiding hazards, there are often even better ways to work safely. If you have ideas for improving the safety of your job or that of co-workers, share them.

   Concluding Remarks
  While nothing we do can completely eliminate the threat of an incident, we can work together to improve our odds. As I said, this must be a real team effort and I'm counting on input from all of you. Let's keep communicating and continue to improve safety.

  Available at: <http://www.ncsu.edu/ehs/www99/right/training/meeting/emplores.html>.Retrieved on: April 1st, 2012. Adapted.

According to the text, it is clear that the author
Alternativas
Q252460 Inglês
                                   Safety Meeting Presentation

  Today's meeting is really about you. I can stand in front of you and talk about working safely and what procedures to follow until I'm blue in the face. But until you understand the need for working safely, until you are willing to be responsible for your safety, it doesn't mean a whole lot.
   Some of you may be familiar with OSHA - the Occupational Safety & Health Administration. The sole purpose of this agency is to keep American workers safe. Complying with OSHA regulations isn't always easy, but if we work together, we can do it. Yet, complying with regulations is not the real reason for working safely. Our real motive is simple. We care about each and every one of you and will do what is necessary to prevent you from being injured.
   However, keeping our workplace safe takes input from everyone. Management, supervisor, and all of you have to come together on this issue, or we're in trouble. For example, upper management has to approve the purchase of safe equipment. Supervisors, including myself, have to ensure that each of you knows how to use that equipment safely. Then it's up to you to follow through the task and use the equipment as you were trained. If any one part of this chain fails, accidents are going to happen and people are going to get hurt.

Responsibility Number One - Recognize Hazards
   At the core of your safety responsibilities lies the task of recognizing safety and health hazards. In order to do that, you must first understand what constitutes a hazard. Extreme hazards are often obvious. Our hopes are that you won't find too many of those around here.
   There are, however, more subtle hazards that won't jump up and bite you. As a result of your safety training and meetings like these, some things may come to mind. For example, a machine may not be easy to lock out. Common practice may be to use a tag. This is a potential hazard and should be discussed. Maybe something can be changed to make it easier to use a lock. Other subtle hazards include such things as frayed electrical cords, a loose machine guard, a cluttered aisle, or maybe something that just doesn't look right.

Responsibility Number Two - Report Hazards
    A big part of recognizing hazards is using your instincts. Nobody knows your job as well as you do, so we're counting on you to let us know about possible problems. Beyond recognizing hazards, you have to correct them or report them to someone who can. This too, is a judgement call. For example, if something spills in your work area you can probably clean it up yourself. However, if there is an unlabeled chemical container and you have no idea what it is, you should report it to your supervisor.

Additional Employee Responsibilities
   Good housekeeping is a major part of keeping your work area safe. For example, you should take a few minutes each day to ensure that aisles, hallways, and stairways in your work area are not obstructed. If boxes, equipment, or anything else is left to pile up, you have a tripping hazard on your hands. Those obstructions could keep you from exiting the building quickly and safely should you face an emergency situation.
   Also watch out for spills. These can lead to slips and falls. Flammable materials are another thing to be aware of. Make sure they are disposed of properly.
   Keep Thinking. Even if you're doing your job safely and you are avoiding hazards, there are often even better ways to work safely. If you have ideas for improving the safety of your job or that of co-workers, share them.

   Concluding Remarks
  While nothing we do can completely eliminate the threat of an incident, we can work together to improve our odds. As I said, this must be a real team effort and I'm counting on input from all of you. Let's keep communicating and continue to improve safety.

  Available at: <http://www.ncsu.edu/ehs/www99/right/training/meeting/emplores.html>.Retrieved on: April 1st, 2012. Adapted.

The expression in boldface introduces the idea of consequence in the fragment:
Alternativas
Q252459 Inglês
                                   Safety Meeting Presentation

  Today's meeting is really about you. I can stand in front of you and talk about working safely and what procedures to follow until I'm blue in the face. But until you understand the need for working safely, until you are willing to be responsible for your safety, it doesn't mean a whole lot.
   Some of you may be familiar with OSHA - the Occupational Safety & Health Administration. The sole purpose of this agency is to keep American workers safe. Complying with OSHA regulations isn't always easy, but if we work together, we can do it. Yet, complying with regulations is not the real reason for working safely. Our real motive is simple. We care about each and every one of you and will do what is necessary to prevent you from being injured.
   However, keeping our workplace safe takes input from everyone. Management, supervisor, and all of you have to come together on this issue, or we're in trouble. For example, upper management has to approve the purchase of safe equipment. Supervisors, including myself, have to ensure that each of you knows how to use that equipment safely. Then it's up to you to follow through the task and use the equipment as you were trained. If any one part of this chain fails, accidents are going to happen and people are going to get hurt.

Responsibility Number One - Recognize Hazards
   At the core of your safety responsibilities lies the task of recognizing safety and health hazards. In order to do that, you must first understand what constitutes a hazard. Extreme hazards are often obvious. Our hopes are that you won't find too many of those around here.
   There are, however, more subtle hazards that won't jump up and bite you. As a result of your safety training and meetings like these, some things may come to mind. For example, a machine may not be easy to lock out. Common practice may be to use a tag. This is a potential hazard and should be discussed. Maybe something can be changed to make it easier to use a lock. Other subtle hazards include such things as frayed electrical cords, a loose machine guard, a cluttered aisle, or maybe something that just doesn't look right.

Responsibility Number Two - Report Hazards
    A big part of recognizing hazards is using your instincts. Nobody knows your job as well as you do, so we're counting on you to let us know about possible problems. Beyond recognizing hazards, you have to correct them or report them to someone who can. This too, is a judgement call. For example, if something spills in your work area you can probably clean it up yourself. However, if there is an unlabeled chemical container and you have no idea what it is, you should report it to your supervisor.

Additional Employee Responsibilities
   Good housekeeping is a major part of keeping your work area safe. For example, you should take a few minutes each day to ensure that aisles, hallways, and stairways in your work area are not obstructed. If boxes, equipment, or anything else is left to pile up, you have a tripping hazard on your hands. Those obstructions could keep you from exiting the building quickly and safely should you face an emergency situation.
   Also watch out for spills. These can lead to slips and falls. Flammable materials are another thing to be aware of. Make sure they are disposed of properly.
   Keep Thinking. Even if you're doing your job safely and you are avoiding hazards, there are often even better ways to work safely. If you have ideas for improving the safety of your job or that of co-workers, share them.

   Concluding Remarks
  While nothing we do can completely eliminate the threat of an incident, we can work together to improve our odds. As I said, this must be a real team effort and I'm counting on input from all of you. Let's keep communicating and continue to improve safety.

  Available at: <http://www.ncsu.edu/ehs/www99/right/training/meeting/emplores.html>.Retrieved on: April 1st, 2012. Adapted.

Based on the meanings in the text, it is clear that
Alternativas
Q252458 Inglês
                                   Safety Meeting Presentation

  Today's meeting is really about you. I can stand in front of you and talk about working safely and what procedures to follow until I'm blue in the face. But until you understand the need for working safely, until you are willing to be responsible for your safety, it doesn't mean a whole lot.
   Some of you may be familiar with OSHA - the Occupational Safety & Health Administration. The sole purpose of this agency is to keep American workers safe. Complying with OSHA regulations isn't always easy, but if we work together, we can do it. Yet, complying with regulations is not the real reason for working safely. Our real motive is simple. We care about each and every one of you and will do what is necessary to prevent you from being injured.
   However, keeping our workplace safe takes input from everyone. Management, supervisor, and all of you have to come together on this issue, or we're in trouble. For example, upper management has to approve the purchase of safe equipment. Supervisors, including myself, have to ensure that each of you knows how to use that equipment safely. Then it's up to you to follow through the task and use the equipment as you were trained. If any one part of this chain fails, accidents are going to happen and people are going to get hurt.

Responsibility Number One - Recognize Hazards
   At the core of your safety responsibilities lies the task of recognizing safety and health hazards. In order to do that, you must first understand what constitutes a hazard. Extreme hazards are often obvious. Our hopes are that you won't find too many of those around here.
   There are, however, more subtle hazards that won't jump up and bite you. As a result of your safety training and meetings like these, some things may come to mind. For example, a machine may not be easy to lock out. Common practice may be to use a tag. This is a potential hazard and should be discussed. Maybe something can be changed to make it easier to use a lock. Other subtle hazards include such things as frayed electrical cords, a loose machine guard, a cluttered aisle, or maybe something that just doesn't look right.

Responsibility Number Two - Report Hazards
    A big part of recognizing hazards is using your instincts. Nobody knows your job as well as you do, so we're counting on you to let us know about possible problems. Beyond recognizing hazards, you have to correct them or report them to someone who can. This too, is a judgement call. For example, if something spills in your work area you can probably clean it up yourself. However, if there is an unlabeled chemical container and you have no idea what it is, you should report it to your supervisor.

Additional Employee Responsibilities
   Good housekeeping is a major part of keeping your work area safe. For example, you should take a few minutes each day to ensure that aisles, hallways, and stairways in your work area are not obstructed. If boxes, equipment, or anything else is left to pile up, you have a tripping hazard on your hands. Those obstructions could keep you from exiting the building quickly and safely should you face an emergency situation.
   Also watch out for spills. These can lead to slips and falls. Flammable materials are another thing to be aware of. Make sure they are disposed of properly.
   Keep Thinking. Even if you're doing your job safely and you are avoiding hazards, there are often even better ways to work safely. If you have ideas for improving the safety of your job or that of co-workers, share them.

   Concluding Remarks
  While nothing we do can completely eliminate the threat of an incident, we can work together to improve our odds. As I said, this must be a real team effort and I'm counting on input from all of you. Let's keep communicating and continue to improve safety.

  Available at: <http://www.ncsu.edu/ehs/www99/right/training/meeting/emplores.html>.Retrieved on: April 1st, 2012. Adapted.

The modal auxiliary in boldface conveys the idea of obligation in the fragment:
Alternativas
Respostas
16681: E
16682: C
16683: C
16684: E
16685: C
16686: C
16687: E
16688: E
16689: E
16690: E
16691: C
16692: C
16693: C
16694: E
16695: C
16696: E
16697: B
16698: C
16699: A
16700: D