The below list provides the Frequently Asked Questions on Control Valves for examination preparation.
Questions on Control Valves
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Sketch the construction of a pneumatically actuated diaphragm type single-seated
control valve. -
Discuss the construction, advantages and disadvantages of a double-seated control
valve. -
When would you recommend to use an air-to-close control valve? Give an example.
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Sketch and discuss the plug shapes and ideal flow characteristics of three different
types of control valves. -
Discuss the ideal flow characteristics of an equal percentage valve.
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Define the term rangeability of a control valve. Why is the property important?
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How does the friction loss of a pipeline connecting the control valve affect the flow
characteristics of the valve? Explain clearly. -
Distinguish between the terms- ideal characteristics and effective characteristics.
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What is the advantage of using a equal percentage valve over a linear valve?