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WorksheetsCONTROL SYSTEMS UNIT I
Total questions: 45
Worksheet time: 34mins
For open control system which of the following statements is incorrect ?
Less expensive
Recalibration is not required for maintaining the required quality of the output
Construction is simple and maintenance easy
Errors are caused by disturbances
A control system in which the control action is somehow dependent on the output is known as
Closed loop system
Semi closed loop system
Open system
None of the above
In closed loop control system, with positive value of feedback gain the overall gain of the system will
decrease
increase
be unaffected
any of the above
Which of the following is an open loop control system ?
Field controlled D.C. motor
Ward leonard control
Metadyne
Stroboscope
In positive Feedback system,
feedback signal in phase with Input signal
feedback signal out of phase with input signal
no relation between feedback signal and input signal
none of the above
Transfer Function is Ratio of
Laplace transform of input to the Laplace transform of output with all initial condition is zero
Laplace transform of output to the Laplace transform of Input with all initial condition is zero
Laplace transform of output to the Laplace transform of Input
all of the above
A system which is not having Feedback is called
closed loop system
open loop system
both
non of the above
Feedback control systems are referred to as closed loop systems.
True
False
The Environment in closed loop control is dynamic.
True
False
The Environment in closed loop control is static.
True
False
What does " X " stands for ?
Transducer
Process/Plant
Controller
Summing junction
A control system is also known as a...
Closed Loop System
Open Loop System
Open Sensor System
Closed Sensor System
The initial response when the output is not equal to the input is known as ?
Dynamic response
Transient response
Error response
None of the above
Which of the following is not an advantage of closed loop system ?
Bandwidth range is range
They are accurate
Facilitates automation
They are simple and economical
Which terminology deals with the stimulus applied to a system from an external source?
Input signal
Output signal
Error signal
Feedback signal
Which among the following illustrate an example of open loop system?
Water level controller
Servo voltage stabilizer
Automatic tea maker
Automatic electric iron
Which of these is not a control system output device?
Projector
LED
Buzzer
Actuator
In an open loop system ?
Output is dependent on control input
Output is independent on control input
Only system parameter have effect
None of the above
We build control system for ?
Power amplification
Remote control
Compensation for disturbances
All the above
A signal other than the reference input that tends to affect the value of controlled variable is known as
Disturbance
Command
Control element
Reference input
Which of the following is the input to a controller?
Error Detector
Desired variable value
servo signal
sensed signal
In ______ controller The output signal is directly proportional to the Error signal.
I controller
P controller
D controller
Both P and I
The initial response when the output is not equal to the input is known as ?
Dynamic response
Transient response
Error response
None of the above
If G1, G2 and G3 gains are connected in cascade connection, Then the total equivalent gain is
G1.G2.G3
G1+G2+G3
G1+G1-G3
ALL
What is the algebric sum of reference input and feedback?
controlled system
Error detector
controlled outpur
Error signal
In force-voltage analogy, what is velocity analogous to
CURRENT
CHARGE
INDUCTANCE
CAPACITANCE
Transfer function of a system is defined as the ratio of output to input in
Z-transformer
Fourier transform
Laplace transform
All of these
How is an output represented in the control systems?
r(t)
x(t)
c(t)
y(t)
To model a rotational mechanical system the three basic elements required are denoted by
M, B, K
J, B, K
G, K, J
M, B, J
Spring constant in force-voltage analogy is analogous to
Capacitance
Current
Resistance
Reciprocal of capacitance
Transfer function of a system is used to calculate which of the following ?
The order of the system
The time constant
The output for any given input
The steady state gain
A car is moving at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
Clutch
Eyes
Needle of speedometer
Steering wheel
The mechanism of control of body temperature is Non Feedback system.
True
False
According to the property of state transition method, e0 is equal to _____
I
A
e-At
-eAt
An interconnection of elements and devices for a desired purpose.
System
Control
Manipulated Variable
Controlled Variable
It is the actual response obtained from the control system.
Output
Input
Feedback
Controlled Variable
The control action is independent of the output.
Open-Loop Control System
Closed-Loop Control System
Feedback Control System
Control System
The control action is somehow dependent on the output.
Closed-Loop Control System
Open-Loop Control System
Process
Input
It is also known as a continuous-time signal or, more generally, a continuous-data signal.
Analog Signal
Digital Signal
Process Signal
Input Signal
It is the choice and arrangement of system components to perform a specific task.
Design
Analysis
Control System
System
