Foram encontradas 70 questões.
Considere o perfil do terreno apresentado a seguir.
Quanto vale, em kPa, a poro-pressão no ponto B?
Dado
γágua=10 kN/m3
Provas
Um terreno apresenta o perfil ilustrado abaixo.
De acordo com o perfil acima, quanto vale, em kPa, a tensão total no ponto C?
Dado
γágua=10 kN/m3
Provas
A figura abaixo mostra um terreno constituído por uma camada de areia fina e fofa. Seu peso específico natural (total) é de 18 kN/m3, e a espessura é de 3 metros, localizada acima de uma camada de areia grossa compacta, com peso específico natural (total) de 20 kN/m3 e espessura de 4 metros. Essa camada de areia está apoiada sobre um solo de alteração de rocha. O nível de água se encontra a 1 metro de profundidade.
Sendo assim, quanto vale, em kPa, a tensão efetiva, a 6 metros de profundidade?
Dado:
γágua=10 kN/m3
Provas
O conhecimento das propriedades e dos comportamentos dos solos é fundamental para a estabilidade e o desempenho de diversas obras civis.
Em relação às propriedades dos solos, tem-se que
Provas
A figura abaixo mostra o permeâmetro, empregado no experimento de Darcy.
Analisando-se essa figura, constata-se que
Provas
As sondagens são de fundamental importância para o projeto e para a execução de obras civis. As sondagens de terrenos podem ser de vários tipos, e a escolha da mais adequada ocorrerá em função do tipo de material existente no terreno a ser sondado.
Nesse contexto, as sondagens
Provas
A figura abaixo representa o escoamento de água subterrâneo.
Após análise dessa figura, conclui-se que
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A presença da água nos solos gera diversas consequências para a engenharia.
Com relação à presença de água nos solos, considere as afirmações abaixo.
I - A água higroscópica é aquela que envolve o grão formando uma camada muito fina devido à atração molecular, e que só se extrai a temperaturas superiores a 100 ºC.
II - As linhas de fluxo principais podem ser traçadas gerando malhas aproximadamente quadrangulares, sendo ortogonais às linhas equipotenciais.
III - Em solos arenosos, a altura capilar desenvolvida é menor que aquela desenvolvida em solos argilosos.
IV - O movimento da água capilar ocorre sempre no sentido da ação da gravidade.
São corretas as afirmações
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A Pedologia estuda a pedogênese, que trata da formação dos solos.
Através dos estudos da Pedologia, constata-se que a(s)
Provas
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.
Provas
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