Protective systems are methods of protecting workers from cave-ins of material that can fall or roll into an excavation, or from the collapse of nearby structures. As mentioned in earlier chapters, if an excavation is less than 5 feet deep, OSHA does not require a protective systems unless the competent person sees signs of a potential cave-in. (It is important to remember that a wall collapse in a trench four and 1/2 feet deep can still have serious results!) For trenches between 5 feet and 20 feet deep, shoring and sheeting, shielding, sloping and benching are all acceptable protective measures. It is up to the planners of the construction project and the competent person on site to determine which systems will work best. If an excavation is greater than 20 feet deep, a registered professional engineer must design the protective system.
Shoring systems are structures of timber, mechanical, or hydraulic systems that support the sides of an excavation and which are designed to prevent cave-ins.Sheeting is a type of shoring system that keeps the earth in position. It can be driven into the ground or work in conjunction with a shoring system. Driven sheeting is most frequently used for excavations open for long periods of time. Another type of sheeting, in which plates or shoring grade plywood (sometimes called Finland form) is used in conjunction with strutted systems such as hydraulic or timber shoring. These strutted systems are also referred to as active systems. The most frequently used strutted system involves aluminum hydraulic shoreswhich are lightweight, re-usable and installed and removed completely from above
The family is not very strong at promoting nationalism: for once, there can be family members of other nationalities, which would promote multinationalism! so we can reject a) and c)
now, military and state religion are both found in the other options and we have to choose between school and athletics - and school is more effective! so the correct answer is D.
Answer:
there are three types of memory: sensory memory, short-term memory, and long-term memory. ... But, our minds also possess sensory and short-term memory. Not all memories are the same; the different types function in different ways.Long-term memory is usually divided into two types—explicit and implicit. ... Explicit memory can be further divided into episodic memory (specific events) and semantic memory (knowledge about the world).Photographic memory is a term often used to describe a person who seems able to recall visual information in great detail. Just as a photograph freezes a moment in time, the implication for people thought to have photographic memory is that they can take mental snapshots and then recall these snapshots without error.Scientists are still unsure about this question. Researchers say that animals, non-humans, do not have a true language like humans. However they do communicate with each other through sounds and gestures. ... But they slowly learn the words of the language and use this as form of communication.
Answer:
An Hour
Explanation:
The only way to remove alcohol from your system is to allow the body time to process it. ... On average, the liver breaks down a little less than one standard drink per hour. Before driving, you should wait at least an hour for each standard drink you've had
Answer:ll Puerto Ricans living in the U.S. and in Puerto Rico treated as second class “citizens”,because we are second class for the U.S. Ruling class.
Explanation:
