Pid controllers Interview Questions
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This document provides 10 multiple choice questions about PID controllers. It introduces Instrumentation Tools, a website that teaches industrial instrumentation, PLCs, DCS, SCADA, field instruments, and analyzers. The questions cover topics like derivative control action, self-regulating processes, proportional band settings, controller wind-up, and when to use process variable filtering. An answer key is provided for the 10 questions.
Pid controllers Interview Questions
- 1. Instrumentation Tools Learn Instrumentation and Control Engineering. Inst Tools covers topics of Industrial Instrumentation, PLC, DCS, SCADA, Field Instruments, Analyzers and so on. https://instrumentationtools.com Author: Instrumentation Tools Categories: Multiple Choice Questions PID Controllers Multiple Choice Questions PID Controllers Multiple Choice Questions Question 1 Derivative control action is typically used when controlling , but rarely used when controlling. (A) Temperature, Flow (B) Flow, Level (C) pH, Temperature (D) Level, Temperature (E) Level, Flow Answer : A Question 2 InstrumentationTools.com InstrumentationTools.com
- 2. Instrumentation Tools Learn Instrumentation and Control Engineering. Inst Tools covers topics of Industrial Instrumentation, PLC, DCS, SCADA, Field Instruments, Analyzers and so on. https://instrumentationtools.com processes always require some degree of control action to achieve setpoint. (A) Integrating, Derivative (B) Integrating, Feedforward (C) Self-regulating, Proportional (D) Runaway, Linear (E) Self-regulating, Integral Answer : E Question 3 The reciprocal of proportional band is called: (A) Reset (B) Percent (C) Minutes per repeat (D) Gain (E) Rate Answer : D Question 4 “Quarter-wave damping” may be described as: (A) a condition of good control where PV approaches SP without overshoot (B) a condition of poor control where oscillations continue at constant amplitude (C) a condition of poor control where the transmitter is damped by 25% (D) a condition of good control where oscillations quickly subside (E) a condition of excellent control where there are no oscillations Answer : D Question 5 Reset control action is often expressed in units of: (A) percent (B) seconds per rate (C) minutes (D) time constant ratio (unitless) (E) repeats per minute Answer : E Question 6 A proportional band setting of 175% is equivalent to a gain setting of . InstrumentationTools.com InstrumentationTools.com
- 3. Instrumentation Tools Learn Instrumentation and Control Engineering. Inst Tools covers topics of Industrial Instrumentation, PLC, DCS, SCADA, Field Instruments, Analyzers and so on. https://instrumentationtools.com (A) 175 (B) 0.756 (C) 0.571 (D) 1.32 (E) 1.75 Answer : C Question 7 The open-loop response of a process is shown in the following trend. What sort of process is indicated by this behavior? (A) Integrating (B) Proportional (C) Linear (D) Direct-acting (E) Self-regulating Answer : A Question 8 A condition where integral control action drives the output of a controller into saturation is called: (A) self-bias InstrumentationTools.com InstrumentationTools.com
- 4. Instrumentation Tools Learn Instrumentation and Control Engineering. Inst Tools covers topics of Industrial Instrumentation, PLC, DCS, SCADA, Field Instruments, Analyzers and so on. https://instrumentationtools.com (B) wind-up (C) repeat (D) noise (E) offset Answer : B Question 9 Fast, self-regulating processes typically respond well to aggressive control action. (A) Nonlinear (B) Derivative (C) Proportional (D) Reset (E) Gain Answer : D Question 10 Process variable filtering should be used: (A) to dampen noise (B) only on integrating processes (C) to improve response time (D) only on self-regulating processes (E) never Answer : A Credits : by Tony R. Kuphaldt InstrumentationTools.com Powered by TCPDF (www.tcpdf.org) InstrumentationTools.com