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1,300 Results Found
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AutoQuiz: What Are the Advantages of Cascade Control?
Cascade control does very little to improve upon control loops that were previously stable. Examples are liquid level and gas pressure control loops. -
AutoQuiz: Characteristics of a Flowmeter
For a turbine flowmeter, the rotor is supported by the hubs and bearings inside of a flowmeter body, and as the rotor spins, the number of revolutions is determined with a magnetic pickup. -
AutoQuiz: How to Measure the Temperature Between Two Dissimilar, Joined Metals
A thermocouple contains two different conductors that produce a voltage proportional to a temperature difference between the ends of a pair of conductors. -
AutoQuiz: How to Measure Fluid Velocity Through a Pipe
The constant between pipes of differing diameters is the flow rate (and other fluid properties) is the same in both pipe lengths. -
Industrial Automation Workers Need a Wider Array of Technical Skills and Knowledge
The complexity of modern automation systems requires partnership and collaboration with an expanded set of industrial and technical disciplines. -
AutoQuiz: Design Specifications for Building Automation Systems
Energy management, access control, lighting control, asset management, communications, life safety, fire alarm, and HVAC controls are all of interest when designing a building automation system -
AutoQuiz: What Is the Continuous Sequence of Steps Performed by a PLC Processor?
The time it takes for the PLC to complete its scanning of all program steps in one operating cycle is called the scan time. -
AutoQuiz: What Network Security Technology Does Not Use Encryption?
A virtual local area network (VLAN) is achieved through configuration of Ethernet switches and not encryption. It divides a physical network into smaller logical networks to increase performance, impr -
AutoQuiz: What Is the Purpose of the Proper Grounding of Electrical Devices?
Proper grounding provides safety, over-current protection, electrical noise reduction, lightning protection, and static electricity reduction. -
AutoQuiz: How to Calculate the Pressure Recovery Factor for Valves
Pressure recovery factor is the increase in fluid static pressure that occurs as fluid moves through a valve from the vena contracta to the valve's outlet and downstream piping. -
AutoQuiz: What Are the Four Key Activities in the Maintenance Cycle of a Control System?
Documentation of the "as left" condition of the control system is a basic requirement for all maintenance, calibration, commissioning, and testing tasks. -
AutoQuiz: What Are Multiple Independent Protection Layers in Relation to Industrial Safety?
A consequence of the concept of multiple independent protection suggests minimization of risk occurs when safety instrumented systems are completely independent from process control systems. -
AutoQuiz: What Is the Response in Level Control System If the Process Liquid Medium Changes?
For a capacitance probe installed in a metal tank, the measured level is proportional to the measured capacitance between the level probe (one capacitor plate) and the tank wall (second capacitor plat -
AutoQuiz: How to Determine Cause of the Apparent Discrepancy in Flow
Periodic visual inspection of orifice plates is required to ensure the integrity of measurement with a digital flow transmitter. -
AutoQuiz: Which Flowmeter Type Does Not Operate on the Principle That a Differential Pressure Is Developed Across a Flow Restriction?
A Coriolis flowmeter develops a flow measurement by measuring the degree of deformation (twisting) of a vibrating tube(s) as the fluid moves through the tube. -
AutoQuiz: What Is an Example of Adaptive Control?
A controller uses a quantitative process model and modifies controller tuning based on how the process responds in relation to the model prediction. -
AutoQuiz: P&ID Determination for Temperature and Pressure Sensors
Instrument technicians often use P&ID diagrams as a reference to identify what type of instrumentation is installed and how the instrumentation is installed in the process. -
AutoQuiz: What is Tree Topology in Fieldbus?
Tree Topology concentrates the connection of several field devices to couplers/junction boxes. Tree topology is also known as "Chickenfoot" or "Star" configuration. -
AutoQuiz: What P&ID Symbol Is Used to Indicate a Temperature Regulator?
The symbol reflects a temperature regulator, filled thermal system. -
AutoQuiz: How to Assess the Optimal Alarm Deadband Setting
Learn to assess the alarm deadband setting on a high alarm.
