Process Control
The operation or operations used in the treatment of materials is known as a ___________.
What is a process?
The primary performance criterion on any closed-loop control system is ___________.
What is stability?
The two basic modes of control that are applied to control loops are On-Off control and ___________.
What is modulating control?
The two types of control loops are electronic and ___________.
What is pneumatic?
Starfish don't have bodies.
True, their entire bodies are technically classed as heads.
The process parameter that is selected for control is the ___________.
What is a controlled variable?
How many control loops does a single cascade control system have?
What is two?
The region of overlap in which a controller does not change state is called the ___________.
What is a neutral zone?
What are the four variables that are the most commonly controlled?
What is temperature, level, flow and pressure?
LEGO bricks cannot withstand compression better than concerte.
False. An ordinary plastic LEGO brick is able to support the weight of 375,000 other bricks before it fails. This, theoretically, would let you build a tower nearing 3.5km in height. Scaling this up to house-size bricks, however, would cost far too much.
The two basic categories of control valves are gate valves and ___________.
What are globe valves?
Cascade control is a modified form of ___________.
What is feedback control?
Proportional control gives an output-to-input signal that is ___________.
What is linear?
Automatic process control systems that provide rapid responses are typically used for processes in which ___________.
What high-speed reactions occur?
A horse is exactly one horsepower.
False. A study in 1993 showed that the maximum power a horse can produce is 18,000W, around 24 horsepower.
Process parameters are subject to change if the energy balance is ___________.
What is an upset?
The type of control that maintains a fixed relationship between two flows, such as mixture of air and fuel for combustion control, is ___________.
What is ratio control?
A control mode that has no residual offset.
What is PI?
The temperature transmitter in an electronic temperature-control loop converts the temperature-dependent resistance value of an RTD sensor into a(n) ___________.
What electrical signal proportional to measured temperature?
The worlds oldest dog lived to 38, while the oldest cat lived to be 29.5.
False - the dog lived to be 29.5 and the cat lived to be 38.
A device that operates to regulate the controlled variable directly is a(n) ___________.
What is a final control element?
Because some inputs for open-loop control of a process system may not be measured or controlled, the system may require ___________.
What is manual adjustment?
The integral mode is slower in response than the proportional mode because the integral mode ___________.
What acts over a period of time?
A PC is most likely to be most likely found in ___________.
What is pressure control loop?
Mount Everest isn't the tallest mountain on Earth.
True, it's actually the twin volcanoes, Mauna Kea and Mauna Loa in Hawaii. 4.2km of their height is submerged underwater.