Question 1

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Actuating signal

Accepted Answer

The answer of MATCHING. Choose the item in column 2...

Question 2

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Controller

Accepted Answer

A controller is a device that applies gain and compensation to the error input (the difference between the set point and the process variable) and produces an output to correct for changes, fitting the definition provided in option A.

Question 3

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Controller output

Accepted Answer

Controller output is the signal output that drives the final control element, which matches definition J.

Question 4

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Final control element

Accepted Answer

The final control element is the device in a control system that physically changes the process variable, acting as the final hardware component in the control loop to enact changes.

Question 5

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Manipulated variable

Accepted Answer

G) A variable changed by the final control element to achieve the desired change in the process variable. This definition accurately describes the manipulated variable, which is adjusted to control the process.

Question 6

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Disturbance

Accepted Answer

Disturbances are any changes in a system that can cause the process variable to deviate from its set point, hence option D, which defines a disturbance as "Any change that causes a change in the process variable," is the correct match.

Question 7

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Process variable

Accepted Answer

The process variable is the specific parameter in a process (such as temperature, pressure, flow rate, etc.) that is being monitored or controlled, making option B the correct definition.

Question 8

MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the process control term with the correct definition of the term. Definitions may be used more than once.
-Feedback transducer

Accepted Answer

Feedback transducers are devices that convert the output of a process variable into a form that can be used by the control system, matching definition C.

Question 9

Match the system description in with the system types .Use the system types as many times as needed.
-One storage element and dissipative element.

Accepted Answer

First order systems are characterized by having one storage element (such as a capacitor or inductor) and one dissipative element (such as a resistor), which matches the given description.

Question 10

Match the system description in with the system types .Use the system types as many times as needed.
-Found in direct liquid heating processes, liquid level processes, and sensors.

Accepted Answer

First order lag systems are commonly found in processes like direct liquid heating, liquid level control, and various sensor dynamics, where the response can be characterized by a single time constant defining how quickly the system responds to changes.

Question 11

Match the system description in with the system types .Use the system types as many times as needed.
-Bode phase plot starts at 0 degrees and ends at -90 degrees.

Accepted Answer

A first order lag system has a Bode phase plot that starts at 0 degrees and ends at -90 degrees.

Question 12

Match the system description in with the system types .Use the system types as many times as needed.
-Gain has a roll off of 20 db per decade.

Accepted Answer

A first-order system has a gain that rolls off at a rate of 20 dB per decade, characteristic of its single-pole nature.

Question 13

Match the system description in with the system types .Use the system types as many times as needed.
-Compliment of a first order lead system.

Accepted Answer

The complement of a first order lead system is a first order lag system, as they are essentially inverse processes of each other. A lead system advances the phase of the input signal, while a lag system delays it.

Question 14

Match the system description in with the system types .Use the system types as many times as needed.
-Two storage elements and one dissipative element.

Accepted Answer

A system with two storage elements (capacitive or inductive) and one dissipative element (resistive) is typically a second-order system, characterized by a second-order differential equation.

Question 15

Match the system description in with the system types .Use the system types as many times as needed.
-Found in indirect heating processes and a process flow valve with spring, mass, damper type system.

Accepted Answer

The description matches a second order lag system, which typically involves a process with a spring, mass, damper type system, indicative of mechanical systems with two energy storage elements.

Question 16

Match the system description in with the system types .Use the system types as many times as needed.
-Has a damping ratio to determine under, critically, and over damped operation.

Accepted Answer

The description matches a second order lag system, which is characterized by having a damping ratio that determines its response as underdamped, critically damped, or overdamped.

Question 17

Match the system description in with the system types .Use the system types as many times as needed.
-Has a response that can produce ringing.

Accepted Answer

A system that can produce ringing is characteristic of a second order lag system, as it can oscillate around a set point before stabilizing, unlike a first order lag system which approaches its steady state monotonically without oscillations.

Question 18

Match the system description in with the system types .Use the system types as many times as needed.
-Bode plot starts at 0 degrees and ends at -180 degrees.

Accepted Answer

A Bode plot that starts at 0 degrees and ends at -180 degrees is characteristic of a second order lag system, as it indicates a phase shift that is typical for systems with two poles.

Question 19

Match the system description in with the system types .Use the system types as many times as needed.
-Gain roll off is at 40 db per decade.

Accepted Answer

A system with a gain roll-off of 40 dB per decade is indicative of a second-order system, hence matching the description of a second-order lag.

Question 20

Match the definition with the correct tuning method listed . Methods can be used as often as necessary.
-The process must be in the automatic or closed loop mode of operation.

Accepted Answer

The answer of Match the definition with the correct tuning...

Quiz 7: Embedded Microcontrollers, Open and Closed Loop Process Control

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Actuating signal

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Controller

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Controller output

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Final control element

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Manipulated variable

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Disturbance

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Process variable

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Feedback transducer

Match the system description in with the system types .Use the system types as many times as needed. -One storage element and dissipative element.

Match the system description in with the system types .Use the system types as many times as needed. -Found in direct liquid heating processes, liquid level processes, and sensors.

Match the system description in with the system types .Use the system types as many times as needed. -Bode phase plot starts at 0 degrees and ends at -90 degrees.

Match the system description in with the system types .Use the system types as many times as needed. -Gain has a roll off of 20 db per decade.

Match the system description in with the system types .Use the system types as many times as needed. -Compliment of a first order lead system.

Match the system description in with the system types .Use the system types as many times as needed. -Two storage elements and one dissipative element.

Match the system description in with the system types .Use the system types as many times as needed. -Found in indirect heating processes and a process flow valve with spring, mass, damper type system.

Match the system description in with the system types .Use the system types as many times as needed. -Has a damping ratio to determine under, critically, and over damped operation.

Match the system description in with the system types .Use the system types as many times as needed. -Has a response that can produce ringing.

Match the system description in with the system types .Use the system types as many times as needed. -Bode plot starts at 0 degrees and ends at -180 degrees.

Match the system description in with the system types .Use the system types as many times as needed. -Gain roll off is at 40 db per decade.

Match the definition with the correct tuning method listed . Methods can be used as often as necessary. -The process must be in the automatic or closed loop mode of operation.