47 Questions
What is the error when measuring 150 psi with an accuracy of ±1.5% of span?
±2.25 psi
Which term refers to the reproducibility with which repeated measurements can be made under identical conditions?
Precision
What is the term for the smallest difference in a variable to which the instrument will respond?
Resolution
When an instrument approaches a signal from opposite directions and gives different readings, what term describes this phenomenon?
Hysteresis
What characteristic is always required for good control, even when accuracy is not necessary?
Precision
What does sensitivity refer to in relation to an instrument?
Smallest detectable input creating output change
Which parameter reflects the difference in readings obtained when an instrument approaches a signal from opposite directions?
Hysteresis
What term describes the reproducibility with which repeated measurements can be made under identical conditions?
Precision
Which parameter reflects the smallest difference in a variable to which the instrument will respond?
Resolution
What is the term for the difference in readings obtained when an instrument approaches a signal from opposite directions?
Hysteresis
What does sensitivity refer to in relation to an instrument?
Minimum detectable output change
Which characteristic is crucial for good control even when accuracy is not necessary?
Precision
In measuring 107 psi with an accuracy of ±1.5% of span, what would be the error based on the given information?
+1.88 psi
Which parameter reflects the reproducibility with which repeated measurements can be made under identical conditions?
Precision
What term describes the difference in readings obtained when an instrument approaches a signal from opposite directions?
Hysteresis
In measuring 107 psi, what would be the error if the gauge has an accuracy of ±2% FSD?
+3 psi
What is the term for the minimum input of physical parameter that will create a detectable output change?
Sensitivity
What is the reason for manufacturers to control the production process?
Ensure safety
Which variable is changed to keep the measured variable at a setpoint?
Manipulated variable
What is used as a device to change the value of the manipulated variable?
Final control element
In a process control loop, what is the proper sequence of controlling?
Measurement, Comparison, and Adjustment
Which device changes the sequence in controlling a loop within a process?
Rectification
What is the error signal in a block diagram of a control system?
Difference between set point and measured output
What is the main focus of the course map for ELE 2603?
Calculating control system signal quantities
Which term best describes a sequence of interdependent steps and linked procedures that convert inputs into outputs?
Process
In the context of process control, what is the purpose of a control system set point?
To define the goal or end result
What does a feedback type represent in a process control loop?
The actual value of the control system
How can a controller type influence the efficiency of a process?
By affecting how the control system responds to deviations from the set point
Which element is crucial for good control in a process even when accuracy is not a priority?
Understanding and defining feedback types
In a process control system, which component is responsible for adjusting the manipulated variable to bring the process variable closer to the set-point?
Controller
What is the primary function of the final control element in a process control system?
Control the manipulated variable
Which component of a process control system directly interacts with the physical process being controlled?
Final control element
If a liquid level is the process variable in a system, what would be the most relevant manipulated variable for controlling this process?
Flow rate
Which sensing element is commonly used to measure liquid level in tanks based on the context provided?
Float gauge
What role does the feedback loop play in a process control system?
It compares the set-point with the measured value
What is the term for a value for a process variable that is desired to be maintained?
Set-point
In process control, what does the term 'measured variable' refer to?
Condition of a process that must be kept at the designated set-point
Which term describes the condition of a variable being observed in a process which can change the manufacturing process in some way?
Common Process Variable
What does the term 'process fluid level' represent in relation to process control instruments?
Process Variable
Which parameter represents the condition of a process that must be kept at the designated set-point?
Process Variable
In the context of process control instruments, what is the significance of 'flow' as a measured variable?
Condition of a variable being observed in a process which can change the manufacturing process
What parameter is defined as the high end of the Range minus the low end of the Range?
Span
What is the term for the resulting discrepancy between the indicated value and the actual value of an instrument?
Accuracy
Which institute provides calibrated devices that can be used as standards for determining accuracy?
National Institute of Standards and Technology (NIST)
If a pressure sensor has a range of 0 to 500 psi, what would be the span of this sensor?
500 psi
What is expressed as a plus-or-minus deviation from true and is typically specified as a percentage of reading or span?
% FSD
What characteristic should instruments be selected with to ensure they can accommodate expected disturbances and possible failures?
Range
Learn about error detection in temperature control systems, where the difference between actual and desired values is measured. Understand the role of set points, manipulated variables, and feedback paths in controlling the temperature of a process fluid.
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