Error Detection in Temperature Control Systems
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Questions and Answers

What is the error when measuring 150 psi with an accuracy of ±1.5% of span?

  • ±2.25 psi (correct)
  • ±0.5 psi
  • ±2.75 psi
  • ±3.5 psi

    • Which term refers to the reproducibility with which repeated measurements can be made under identical conditions?

  • Accuracy
  • Precision (correct)
  • Resolution
  • Sensitivity

    • What is the term for the smallest difference in a variable to which the instrument will respond?

  • Sensitivity
  • Hysteresis
  • Resolution (correct)
  • Precision

    • When an instrument approaches a signal from opposite directions and gives different readings, what term describes this phenomenon?

    <p>Hysteresis</p> Signup and view all the answers

    What characteristic is always required for good control, even when accuracy is not necessary?

    <p>Precision</p> Signup and view all the answers

    What does sensitivity refer to in relation to an instrument?

    <p>Smallest detectable input creating output change</p> Signup and view all the answers

    Which parameter reflects the difference in readings obtained when an instrument approaches a signal from opposite directions?

    <p>Hysteresis</p> Signup and view all the answers

    What term describes the reproducibility with which repeated measurements can be made under identical conditions?

    <p>Precision</p> Signup and view all the answers

    Which parameter reflects the smallest difference in a variable to which the instrument will respond?

    <p>Resolution</p> Signup and view all the answers

    What is the term for the difference in readings obtained when an instrument approaches a signal from opposite directions?

    <p>Hysteresis</p> Signup and view all the answers

    What does sensitivity refer to in relation to an instrument?

    <p>Minimum detectable output change</p> Signup and view all the answers

    Which characteristic is crucial for good control even when accuracy is not necessary?

    <p>Precision</p> Signup and view all the answers

    In measuring 107 psi with an accuracy of ±1.5% of span, what would be the error based on the given information?

    <p>+1.88 psi</p> Signup and view all the answers

    Which parameter reflects the reproducibility with which repeated measurements can be made under identical conditions?

    <p>Precision</p> Signup and view all the answers

    What term describes the difference in readings obtained when an instrument approaches a signal from opposite directions?

    <p>Hysteresis</p> Signup and view all the answers

    In measuring 107 psi, what would be the error if the gauge has an accuracy of ±2% FSD?

    <p>+3 psi</p> Signup and view all the answers

    What is the term for the minimum input of physical parameter that will create a detectable output change?

    <p>Sensitivity</p> Signup and view all the answers

    What is the reason for manufacturers to control the production process?

    <p>Ensure safety</p> Signup and view all the answers

    Which variable is changed to keep the measured variable at a setpoint?

    <p>Manipulated variable</p> Signup and view all the answers

    What is used as a device to change the value of the manipulated variable?

    <p>Final control element</p> Signup and view all the answers

    In a process control loop, what is the proper sequence of controlling?

    <p>Measurement, Comparison, and Adjustment</p> Signup and view all the answers

    Which device changes the sequence in controlling a loop within a process?

    <p>Rectification</p> Signup and view all the answers

    What is the error signal in a block diagram of a control system?

    <p>Difference between set point and measured output</p> Signup and view all the answers

    What is the main focus of the course map for ELE 2603?

    <p>Calculating control system signal quantities</p> Signup and view all the answers

    Which term best describes a sequence of interdependent steps and linked procedures that convert inputs into outputs?

    <p>Process</p> Signup and view all the answers

    In the context of process control, what is the purpose of a control system set point?

    <p>To define the goal or end result</p> Signup and view all the answers

    What does a feedback type represent in a process control loop?

    <p>The actual value of the control system</p> Signup and view all the answers

    How can a controller type influence the efficiency of a process?

    <p>By affecting how the control system responds to deviations from the set point</p> Signup and view all the answers

    Which element is crucial for good control in a process even when accuracy is not a priority?

    <p>Understanding and defining feedback types</p> Signup and view all the answers

    In a process control system, which component is responsible for adjusting the manipulated variable to bring the process variable closer to the set-point?

    <p>Controller</p> Signup and view all the answers

    What is the primary function of the final control element in a process control system?

    <p>Control the manipulated variable</p> Signup and view all the answers

    Which component of a process control system directly interacts with the physical process being controlled?

    <p>Final control element</p> Signup and view all the answers

    If a liquid level is the process variable in a system, what would be the most relevant manipulated variable for controlling this process?

    <p>Flow rate</p> Signup and view all the answers

    Which sensing element is commonly used to measure liquid level in tanks based on the context provided?

    <p>Float gauge</p> Signup and view all the answers

    What role does the feedback loop play in a process control system?

    <p>It compares the set-point with the measured value</p> Signup and view all the answers

    What is the term for a value for a process variable that is desired to be maintained?

    <p>Set-point</p> Signup and view all the answers

    In process control, what does the term 'measured variable' refer to?

    <p>Condition of a process that must be kept at the designated set-point</p> Signup and view all the answers

    Which term describes the condition of a variable being observed in a process which can change the manufacturing process in some way?

    <p>Common Process Variable</p> Signup and view all the answers

    What does the term 'process fluid level' represent in relation to process control instruments?

    <p>Process Variable</p> Signup and view all the answers

    Which parameter represents the condition of a process that must be kept at the designated set-point?

    <p>Process Variable</p> Signup and view all the answers

    In the context of process control instruments, what is the significance of 'flow' as a measured variable?

    <p>Condition of a variable being observed in a process which can change the manufacturing process</p> Signup and view all the answers

    What parameter is defined as the high end of the Range minus the low end of the Range?

    <p>Span</p> Signup and view all the answers

    What is the term for the resulting discrepancy between the indicated value and the actual value of an instrument?

    <p>Accuracy</p> Signup and view all the answers

    Which institute provides calibrated devices that can be used as standards for determining accuracy?

    <p>National Institute of Standards and Technology (NIST)</p> Signup and view all the answers

    If a pressure sensor has a range of 0 to 500 psi, what would be the span of this sensor?

    <p>500 psi</p> Signup and view all the answers

    What is expressed as a plus-or-minus deviation from true and is typically specified as a percentage of reading or span?

    <p>% FSD</p> Signup and view all the answers

    What characteristic should instruments be selected with to ensure they can accommodate expected disturbances and possible failures?

    <p>Range</p> Signup and view all the answers

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