Control Valve Flow Characteristics

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| By Bcusa-wt
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Bcusa-wt
Community Contributor
Quizzes Created: 2 | Total Attempts: 1,117
Questions: 5 | Attempts: 557

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Control Valve Flow Characteristics - Quiz

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Questions and Answers
  • 1. 

    The three most common types of flow characteristics are:

    • A.

      Linear, Graphical, Random

    • B.

      Equal Percentage, Un-equal percentage, Quick opening

    • C.

      Non-linear, Equal percentage, Fast opening

    • D.

      Linear, Equal percentage, Quick opening

    Correct Answer
    D. Linear, Equal percentage, Quick opening
    Explanation
    The correct answer is Linear, Equal percentage, Quick opening. These three types of flow characteristics refer to how the flow rate changes in response to changes in valve position. Linear flow characteristics means that the flow rate changes linearly with the valve position. Equal percentage flow characteristics means that equal increments in valve position result in equal percentage changes in the flow rate. Quick opening flow characteristics means that the flow rate increases rapidly as the valve opens. Therefore, the correct answer includes all three types of flow characteristics.

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  • 2. 

    What type of characteristic might be best used for liquid level or flow loops?

    • A.

      Equal Percentage

    • B.

      Linear

    • C.

      Quick opening

    Correct Answer
    B. Linear
    Explanation
    Linear characteristics are best used for liquid level or flow loops because they provide a consistent and proportional response to changes in the input signal. This means that as the liquid level or flow rate increases or decreases, the output signal will change in a linear and predictable manner. This is ideal for maintaining accurate and precise control over liquid levels and flow rates, as it allows for easy calibration and adjustment of the control system.

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  • 3. 

    A typical application of an equal percentage characteristic might be:

    • A.

      Temperature and pressure control

    • B.

      Liquid level control

    • C.

      Frequent on/off service

    • D.

      DeviceNet control

    Correct Answer
    B. Liquid level control
    Explanation
    Equal percentage valve (most commonly used in valves):
    • Temperature and pressure control loops.
    • Used in systems where large changes in pressure drop across
    the valve are expected.

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  • 4. 

    The type 86(7)92/86(7)93 features a transfer element which implements 3 different characteristics.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because it states that the type 86(7)92/86(7)93 features a transfer element that implements 3 different characteristics. This implies that the type 86(7)92/86(7)93 has a transfer element and this element has the capability to perform three different functions or exhibit three different properties.

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  • 5. 

    It is not possible to customize a characteristic.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is incorrect. It is possible to customize a characteristic. Customization allows for the modification or adaptation of a characteristic to fit specific needs or preferences.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 08, 2017
    Quiz Created by
    Bcusa-wt
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