30 Questions
What describes the operation of an element at unsteady-state conditions when the process is changing?
Dynamic characteristics
Which term refers to the percentage of the full-scale range or reading when specifying control element accuracy?
Precision
What is the property that manufacturers may have different meanings for when specifying it?
Accuracy
Which characteristic measures the agreement among measured values and does not describe the same thing as accuracy?
Precision
What term describes how quickly an element reacts to a change in the measured variable or produces a 100% change in output signal due to a 100% change in input signal?
Response time
What may be intentionally introduced into control strategy?
Bias
What is the purpose of Safety Instrumented Functions (SIF) in a Safety Instrumented System (SIS)?
To achieve or maintain a safe condition of the process by addressing hazardous events
Why do different industries have different Safety Integrity Level (SIL) requirements for their Safety Instrumented Systems (SIS)?
Due to differing levels of risk associated with different processes
What is a common characteristic of sensors used in Safety Instrumented Systems (SIS) for safety shutdown?
They are independent sensors dedicated to safety functions
What is the role of a Logic Solver in a Safety Instrumented System (SIS)?
To determine the action needed based on sensor information
What are some characteristics of a Common Alarm System used in industrial processes?
Loud and bright to be heard and seen by control room personnel
Why should Safety Shutdown in Safety Instrumented Systems (SIS) rely on dedicated sensors instead of regulatory control sensors?
To ensure independent safety functions and avoid reliance on non-safety sensors
What is the Datum Line in level measurement?
The starting point for making a measurement
What is the purpose of applying zero suppression to a level measurement set-up?
To increase the accuracy of the measurement
What is the term 'deadband' referring to in pressure switches?
The difference between the pressure at which the switch activates and deactivates
What does 'Innage' refer to in level measurement methods?
Measuring from the bottom to the liquid surface
How does 'Outage' differ from 'Innage' in level measurement?
It measures from the top to the liquid surface
What does 'Ullage' mean in level measurement terminology?
The top space above a liquid's surface in a closed container
What is the purpose of uncertainty analysis in calibration laboratories?
To identify factors affecting calibration accuracy
What does 'uncertainty of measurement' refer to?
Doubt about the validity of the measurement result
Which of the following is essential for traceability in measurements?
Relating measurements back to international standards
What is the main outcome of a measurement according to the text?
Approximation or estimate with uncertainty
Which factor is critical for calibration laboratories to comply with ISO 17025 requirements?
Proper uncertainty analysis
Why must all measuring instruments undergo calibration?
To ensure reliability and accuracy
What happens when a solenoid valve is de-energized?
Blocks air pressure coming from the I/P and vents all air pressure from the valve's actuating diaphragm
What is the purpose of the Common Alarm System?
To provide audible and visual alarms for notification purposes
What is an example of an Instrument Protected Function (IPF) according to the text?
Pressure Relief Valve
In what scenario will a Passive Protection Layer be activated?
When Active Protection Layer fails
What are examples of Final Control Elements given in the text?
Control Valve, damper, variable-pitch blades, motor drives
What is the function of Rapture Disc mentioned in the text?
Protect a pressure vessel, equipment, or system from over-pressurization
Learn about uncertainty analysis in calibration laboratories following ISO 17025 requirements. Understand how to assess and identify factors impacting calibration accuracy using digital multimeters, signal simulators, and other devices.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
