Podcast
Questions and Answers
Which component of an automatic control system continuously compares the value of a process variable with a set point and responds to the error by re-positioning the final control element?
Which component of an automatic control system continuously compares the value of a process variable with a set point and responds to the error by re-positioning the final control element?
- Recorder
- Transmitter
- Controller (correct)
- Indicator
What is the purpose of a recorder in an instrumentation and control system?
What is the purpose of a recorder in an instrumentation and control system?
- To validate the conditions observed by control room operators
- To input digital data signals into computerized control systems
- To continuously compare the value of a process variable with a set point
- To make permanent records of process conditions (correct)
Which final control element is commonly used in boilers to control combustion airflow?
Which final control element is commonly used in boilers to control combustion airflow?
- Steam control valve
- Damper (correct)
- Control valve
- Variable speed drive
Which component of an automatic control system is responsible for continuously comparing the value of a process variable with a set point and re-positioning the final control element based on the error measured?
Which component of an automatic control system is responsible for continuously comparing the value of a process variable with a set point and re-positioning the final control element based on the error measured?
What is the purpose of a recorder in an instrumentation and control system?
What is the purpose of a recorder in an instrumentation and control system?
Which final control element is commonly used in boilers to control fuel flow?
Which final control element is commonly used in boilers to control fuel flow?
Which type of transducer converts variable current signals into variable pneumatic signals?
Which type of transducer converts variable current signals into variable pneumatic signals?
Which type of transducer converts variable voltage signals into variable pneumatic signals?
Which type of transducer converts variable voltage signals into variable pneumatic signals?
What type of transducer converts a 4–20 mA signal to a 0–10 V proportional signal?
What type of transducer converts a 4–20 mA signal to a 0–10 V proportional signal?
Which type of transducer converts variable voltage signals into variable pneumatic signals?
Which type of transducer converts variable voltage signals into variable pneumatic signals?
What type of transducer converts a 4–20 mA signal to a 0–10 V proportional signal?
What type of transducer converts a 4–20 mA signal to a 0–10 V proportional signal?
What do photoelectric transducers use to detect light intensity?
What do photoelectric transducers use to detect light intensity?
Which type of device is used to transfer a shutdown signal, often converting the signal in the process?
Which type of device is used to transfer a shutdown signal, often converting the signal in the process?
Which type of device is used as sensing elements in alarms to give visual, audible, or combined warning of unsafe or improper operating conditions?
Which type of device is used as sensing elements in alarms to give visual, audible, or combined warning of unsafe or improper operating conditions?
Which type of device can be incorporated into automatic decision-making systems such as Programmable Logic Controllers (PLC)?
Which type of device can be incorporated into automatic decision-making systems such as Programmable Logic Controllers (PLC)?
