DCS Engineer Interview Questions - Fundamentals (Refinery ,Power Plant, Chemical Plant ,Paper)


#1

Some of the Interview questions for Control System Engineers - DCS (Distributed Control System )

Q) Definition of DCS?
A microprocessor based control and Data acquisition system consisting of number of modules operating over a network.

Q)Typical functions available in DCS

1 PID Control
2 Discrete control
3 Advanced control capability
4 Alarm management
5 Graphical and Schematic displays
6 Trending of real time and historic data
7 Communication between other device and subsystem
8 Data acquisition
9 Report generation
10 Data Historization

Q) Different type of PID function included in DCS?

PID Basics controller
PID Ratio
PID cascade
PID Bias
PID Differential gap
PID adaptive gain
PID non linear
Manual station
PID self tuning
External output tracking
Reset limiting

Q)Math functions included in DCS?

ADD
Subtract
Multiply
Division
Summation
Difference
Square root
Square
Absolute Value
Logarithm
Exponential
Polynomial

Q) Dynamic functions included in DCS?

Lead/Lag
Dead time
Velocity limit
Totalize

Q) Logic controls included in DCS?

And
OR
Exclusive OR
On/Off Delay
Inverter
Flip-Flop
Pulse
Nand
Nor