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PID Controller Quiz | PID Controller Multiple Choice Questions and Answers

Questions
1 The 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

Answer: Temperature, Flow
2 processes always require some degree of control action to achieve setpoint.
A Runaway, Linear
B Self-regulating, Integral
C Integrating, Derivative
D Self-regulating, Proportional

Answer: Self-regulating, Integral
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3 PID controller is also known as
A three term controller
B proportional controller
C two term controller
D four term controller

Answer: three term controller
4 A bilinear transformation that converts transfer functions from continuous to sampled and vice versa is called
A similarity transformation
B Tustin transformation
C Laplace transformation
D integral transformation

Answer: Tustin transformation
5 A system that is a portion of larger system is called
A primary system
B partition
C subsystem
D singular system

Answer: subsystem
6 A state space representation in which each state equation is a function of only one state variable is called
A decoupled system
B open loop system
C feedback system
D coupled system

Answer: decoupled system
7 A filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels is called
A band stop filter
B band loop filter
C band start filter
D zero band filter

Answer: band stop filter
8 In a PID controller, the overshoots has increased. The derivative time constant has to be __ so as to reduce the overshoots:
A Reduced to zero
B Increased
C Reduced
D None of the above

Answer: Increased
9 In a PID controller, the offset has increased. The integral time constant has to be ___ so as to reduce offset:
A Increased
B Reduced
C Reduced to zero
D None of the above

Answer: Increased
10 Which of the following system provides excellent transient and steady state response:
A Proportional + Differential action
B Proportional + Integral + Differential action
C Proportional action
D Proportional + Integral action

Answer: Proportional + Integral + Differential action
11 The number of operational amplifiers require for designing of electronic PID controller is:
A 6
B 1
C 2
D 3

Answer: 1
12 When derivative action is included in a proportional controller, the proportional band:
A Remains unchanged
B Increases
C Reduces
D None of the above

Answer: Remains unchanged
13 In a proportional temperature controller, if the quantity under the heater increases the offset will:
A Increase
B Reduce
C Remain uneffected
D None of the above

Answer: Increase
14 The integral control:
A Decreases the damping coefficient
B Increases the steady state error
C Increases the noise and stability
D Decreases the steady state error

Answer: Increases the steady state error
15 The term reset control refers to:
A Integral
B Derivative
C Proportional
D None of the above

Answer: Integral
16 Proportional band of the controller is expressed as:
A Percentage
B Range of control variables
C Gain
D Ratio

Answer: Percentage
17 Proportional band of a controller is defined as the range of:
A Measured variables through which the air output varies from maximum to minimum
B Air output as the measured variable varies from maximum to minimum
C Measured variable to the set variable
D None of the above

Answer: Measured variables through which the air output varies from maximum to minimum
18 Rate compensation :
A Increases damping factor
B Second order
C Increases bandwidth
D Attenuation

Answer: Increases damping factor
19 Lag-lead compensation is a:
A Increases damping factor
B Second order
C Attenuation
D Increases bandwidth

Answer: Second order
20 Lead compensation leads to:
A Increases bandwidth
B Attenuation
C Increases damping factor
D Second order

Answer: Increases bandwidth

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