Which of the following prevents rapid switching on and off control valves in pressure control systems? a. compare actual pressure to the upper and lower limits b. compare actual pressure to the desired pressure value c. compare actual pressure to the center of the dead band d. compare actual pressure to the maximum and minimum valve positions.

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Q: What is the center type of this valve?

A: See the answer in the next page.

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.