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 (B)</p> Signup and view all the answers

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

<p>Precision (C)</p> Signup and view all the answers

What does sensitivity refer to in relation to an instrument?

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

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

<p>Precision (C)</p> Signup and view all the answers

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

<p>Resolution (A)</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 (D)</p> Signup and view all the answers

What does sensitivity refer to in relation to an instrument?

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

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

<p>Precision (A)</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 (A)</p> Signup and view all the answers

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

<p>Precision (B)</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 (D)</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 (D)</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 (A)</p> Signup and view all the answers

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

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

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

<p>Manipulated variable (C)</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 (D)</p> Signup and view all the answers

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

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

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

<p>Rectification (D)</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 (D)</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 (C)</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 (B)</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 (B)</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 (D)</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 (A)</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 (C)</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 (D)</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 (D)</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 (A)</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 (B)</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 (C)</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 (B)</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 (C)</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 (B)</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 (A)</p> Signup and view all the answers

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

<p>Process Variable (D)</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 (D)</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 (B)</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 (A)</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 (C)</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) (D)</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 (B)</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 (D)</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 (A)</p> Signup and view all the answers

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