1989-8-i-a-ctrl
Oscillations of a system may be reduced by one of the following controllers [[1]] for one of the following reasons [[2]].
1989-8-i-b-ctrl
The response of a first order system with a proportional controller
has an offset to a step input. The offset can be eliminated by which one of the following actions? [[1]] By this action, what happens to the overall order of the system? [[2]]
1991-9-iv-ctrl
The type of process that most often can benefit from derivative control is:
1996-2-15-ctrl
The transfer function for an ideal proportional plus reset controller (Reset time
1997-1-23-ctrl
The transfer function of a PID controller is
1997-1-27-ctrl
A proportional controller with a gain of
2007-16-ctrl
An operator was told to control the temperature of a reactor at 60oC. The operator set the set-point of the temperature controller at 60. The scale actually indicated 0 to 100% of a temperature range of 0 to 200o C. This caused a runaway reaction by over-pressurizing the vessel, which resulted in injury to the operator. The actual set-point temperature was
2011-44-ctrl
The following diagram shows a CSTR with two control loops. A liquid phase, endothermic reaction is taking place in the CSTR, and the system is initially at steady state. Assume that the changes in physical properties of the system are negligible.
TC: Temperature controller, LC: Level controller, TT: Temperature transmitter, LT: Level transmitter,
Which ONE of the following statements is TRUE?
2011-8-ctrl
1987-20-i-ctrl
Determine the (i) sensitivity (in (kN/m
(i) sensitivity
{#1}
(ii) proportional band
{#2}
2006-74-75-ctrl
The block diagram of a closed loop control system is shown in the figure below.
(i) The closed loop transfer function
{#1}
(ii) Let
{#2}
2011-54-55-ctrl
A PID controller output
(i) The transfer function of the controller is
{#1}
(ii) The characteristic equation of the closed loop is
{#2}
1998-2-20-ctrl
A proportional plus integral controller with proportional sensitivity
1998-2-23-ctrl
In a closed loop system, the process to be controlled is an integrating process with transfer function
2001-2-19-ctrl
The block diagram of an integrating level process is given below. For unit step change in the set point
2009-43-ctrl
The block diagram for a control system is shown below:
For a unit step change in the set point,
2010-42-ctrl
A block diagram for a control system is shown below:
The steady state gain of the closed loop system, between output
1988-18-i-ctrl
An electronic proportional controller has an input range of 4 to 20 mA and output range of 1 to 5 V. For an input change of 4 mA, what will be the output change (in V), if the proportional band of the controller is 40%.
1988-18-ii-ctrl
A 5% equal percentage pneumatic valve has an input range 20�100 kN/m
1994-27-ctrl
The transfer function of a process, a measuring element and a control valve is given respectively by
Write the closed loop transfer function relating the output (
What is the steady state error in the output for a unit step change in the set point?
1997-8-ctrl
A control system is shown below.
Determine the variation of
2014-53-ctrl
Consider the following block diagram for a closed-loop feedback control system:
A proportional controller is being used with
2015-51-ctrl
The block diagram for a process with feedback control for output deviation variable
2018-45-ctrl
1988-18-iii-ctrl
A control system is represented by the following block diagram:
Derive the servo and regulator transfer functions.
2000-15-ctrl
Given the following block diagram,
Express the transfer function
Calculate the offset in
Last Modified on: 02-May-2024
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