What is the main objective of process control?
The objectives of process control are generally either to maintain a process at a desired, constant operating condition (temperature, pressure, composition, etc.) in the face of disturbances or, less typically in conventional process applications, to force it to follow a desired trajectory with time.
What is main objective process control Mcq?
What is the main objective of process control? Explanation: A process control is mainly used in order to control the physical parameters including temperature, pressure, flow rate, force, etc.
What is control system Mcq?
Explanation: Control System is a system in which the output is controlled by varying the input.
Where is SCADA used in Mcq?
The applications of the SCADA include the food processing industry, chemical industry, water treatment plant, etc. It can be interfaced to programmable logic controller to read and present the information in graphical, animated form or make a log.
What is DCS plant?
A distributed control system (DCS) is a computerised control system for a process or plant usually with many control loops, in which autonomous controllers are distributed throughout the system, but there is no central operator supervisory control.
What is the input to a controller?
Detailed Solution Error signal is the input to the controller, and it causes the output to be the desired output. Controller is used in closed loop control systems.
What are the 5 process variables?
Process Variable Common process variables include – level, flow, temperature, density, PH(acidity or alkalinity), mass, conductivity etc.
What are the two forms of process control?
3 Types of Process Control
- Batch process control. In this type of application, exact quantities of particular raw materials are mixed for a precise period in a particular manner to achieve a specific product.
- Continuous. In this type of application, the variables remain uninterrupted and smooth in time.
- Hybrid.
What is process lag in process control?
In mineral processing, the delay or retardation in the response of the controlled variable at a point of measurement to a change in value of the manipulated variable. Ref: Fuerstenau.
What are the 3 variables involved in process control?
There are three broad categories for any given system: inputs, outputs, and constants or parameters. Inputs are any factors that change with time that affect the system’s output. The output refers to the desired controlled variable.
What is the difference between SCADA and HMI?
The main difference is that SCADA is a remote monitoring system, where as HMI is local to machine. A HMI for example, would be placed on the control panle near a part of a machine, where as SCADA would be set up in a control room, far away from the machine itself.
What is difference between DCS and SCADA?
The main similarity between SCADA and DCS is that both systems control plant operations and the devices that they can deploy. On the other hand, the main difference is what they focus on – SCADA systems prioritize collecting and understanding data, while DCS systems is geared towards process control.
What is meant by PID controller?
A PID controller is an instrument used in industrial control applications to regulate temperature, flow, pressure, speed and other process variables. PID (proportional integral derivative) controllers use a control loop feedback mechanism to control process variables and are the most accurate and stable controller.
What is IO control?
An I/O controller connects input and output (I/O) devices to the bus system of a central processing unit (CPU). It typically communicates with the CPU and with the system memory over the system bus and can control many devices.
What are the key principles of software testing?
It also includes MCQ questions from seven key principles of software testing, main activities of the fundamental test process such as test planning control, test analysis and design and design, test implementation and execution, evaluating exit criteria and reporting and test closure activities along with the major tasks performed on each phase.
What is a question criterion in control engineering?
Question 14. Question criterion provides information about the actual location of roots. cannot be used to test the stability of a control system containing transportation lag. criterion is not applicable to systems with polynomial characteristic equation.
Is it possible to test all input/output combinations for a software system?
ii) It is normally impossible to test all input/output combinations for a software system. 9. State whether the following statements are True about the key principles of software testing.
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