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Management By Stephen P Robbins 11th Edition Mcq



 


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pptThis invention relates to an improved safety valve for use on a common water supply to an entire house or building. A common occurrence is to have a person cut off the water to a room, and then, after determining that a water leak exists, go back to turn off the water to the room in order to prevent the flooding of the room. The problem in returning to the room to turn off the water is that the person may forget that he or she had turned off the water to the room, thus flooding the room. In the past, it has been proposed to use a valve to shut off water supply to a room. The proposed devices, however, are complicated, are expensive, and are inefficient. The present invention provides a safety valve for a common water supply line to an entire house or building. The valve includes a valve inlet connected to the water supply line and a valve outlet in fluid communication with a room outlet. The valve has a valve seat in an annular chamber around the valve outlet, and has a valve member in the chamber. A valve mechanism moves the valve member from a first position, in which the valve member closes the valve outlet, to a second position, in which the valve member allows water to flow through the valve outlet. The valve member is caused to open the valve outlet when the pressure of water flowing from the valve inlet to the valve outlet exceeds a predetermined pressure level. The valve is located in a housing, which is fluidly connected to the valve outlet. The housing is moveable between a first position, in which the housing is out of the way of water flowing from the valve inlet, and a second position, in which the housing exposes the valve outlet to the water flowing from the valve inlet. A shut-off element is located in the housing for movement between a first position, in which the shut-off element closes the valve outlet and a second position, in which the shut-off element opens the valve outlet. In a preferred embodiment, the shut-off element is located in the housing in fluid communication with the valve outlet and is urged into the first position by the valve mechanism. In a preferred embodiment, the shut-off element is a ball, and the valve mechanism comprises a second ball which is urged into the second position by a spring. The second ball moves the first ball into the second position, thereby opening the valve outlet. In another preferred embodiment, the valve mechanism comprises a piston, the piston having a first end which

 

 


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Management By Stephen P Robbins 11th Edition Mcq

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