Oriental Carbon & Chemicals Assistant Manager Instrumentation Interview Questions and Answers

Hot loop and cold loop are two types of control loops used in instrumentation. Hook-up diagrams show the connection between instruments.

• Hot loop is used for high temperature applications while cold loop is used for low temperature applications.

• Hot loop uses thermocouples or RTDs while cold loop uses thermistors.

• Hook-up diagrams show the physical connection between instruments, such as transmitters, controllers, and val...read more

PLC, DCS and SCADA are industrial control systems used for automation and monitoring.

• PLC (Programmable Logic Controller) is used for discrete control and is ideal for applications with a high number of digital inputs and outputs.

• DCS (Distributed Control System) is used for continuous control and is ideal for applications with a high number of analog inputs and outputs.

• SCADA (Supervisory Control and Data Acquisition) is...read more

There are various types of control systems used in instrumentation.

• Open loop control system

• Closed loop control system

• Feedback control system

• Feedforward control system

• Proportional-Integral-Derivative (PID) control system

• On-Off control system

• Fuzzy logic control system

• Programmable Logic Controller (PLC) control system