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Worksheetscontrol system
Total questions: 50
Worksheet time: 50mins
Which among the following represents an illustration of closed loop system?
Automatic washing machine
Bread toaster
Automatic electric iron box
Electric hair drier
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
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
How is an output represented in the control systems?
r(t)
x(t)
c(t)
y(t)
The advantage of block diagram representation is that it is possible to evaluate the contribution of each component to the overall performance of the system.
a) True
b) False
6. The overall transfer function from block diagram reduction for cascaded blocks is :
a) Sum of individual gain
b) Product of individual gain
c) Difference of individual gain
d) Division of individual gain
The overall transfer function of two blocks in parallel are :
a) Sum of individual gain
b) Product of individual gain
c) Difference of individual gain
d) Division of individual gain
Transfer function of the system is defined as the ratio of Laplace output to Laplace input considering initial conditions________
a) 1
b) 2
c) 0
d) infinite
Oscillations in output response is due to :
a) Positive feedback
b) Negative feedback
c) No feedback
d) None of the mentioned
WHAT IS THE ANOTHER NAME FOR TAKE OFF POINT
RESISTOR
BRANCH POINT
SUMMING POINT
DOT POINT
WHAT IS THE ANOTHER NAME FOR TAKE OFF POINT
RESISTOR
BRANCH POINT
SUMMING POINT
DOT POINT
For the block diagram given in the following figure, the expression of C/R is:
a) G1G2G3/1-G2G1
b) G1G2/1-G1G2G3
c) G1G2G3/1-G1G2G3
d) G1G2/G3(1-G1G2)
The transfer function from D(s) to Y(s) is :
a) 2/3s+7
b) 2/3s+1
c) 6/3s+7
d) 2/3s+6
The transfer function from D(s) to Y(s) is :
a) 2/3s+7
b) 2/3s+1
c) 6/3s+7
d) 2/3s+6
The closed loop gain of the system shown in the given figure is :
a) -9/5
b) -6/5
c) 6/5
d) 9/5
IDENTIFY THE COMPONENTS OF BLOCK DIAGRAM
BLOCK
SIGNAL
SUMMING POINT
BLOCK,SIGNAL,SUMMING POINT,TAKE OFF POINT
Block Diagram can be used to represent:
Only linear systems
Only non-linear systems
only time-variant systems
time-invariant as well as time-variant
Signal flow graphs can be used to represent:
Only linear systems
Only non-linear systems
only time-variant systems
time-invariant as well as time-variant
Which system is also known as automatic control system?
open loop control system
Closed loop control system
both 1 & 2
None of these
In open loop system____
the control action depends on the size of the system
the control action depends on system variables
the control action depends on the input signal
the control action is independent of the output
A control system in which the control action is somehow dependent on the output is known as
Open loop system
Semiclosed loop system
Closed loop system
None of the above
With feedback _______ increases
system stability
sensitivity
gain
effects of disturbing signals
With feedback _______ increases
system stability
sensitivity
gain
effects of disturbing signals
Reference input minus the primary feedback is called ________ signal
Manipulated variable
Error signal
Zero signal
Primary feedback
Transfer function is the ratio of
Laplace transform of output to input
Laplace transform of output to Laplace transform of input.
Laplace transform of output to Laplace transform of input assuming all initial condition zero.
Output to Laplace transform of input.
In a signal flow graph method, how is an overall transfer function of a system obtained?
Poisson's equation
Mason's equation
Block diagram reduction rule
Lagrange's equation
A node in SFG which has only outgoing branches is called a:
Source Node
Sink Node
Intermediate node
general node
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
Feedback control system are refered to as closed loop system.
Yes
no
eithor yes or No
none
the overall transfer function from block diagram reduction for cascade is:
division of individual gain
sum of individual gain
product of individual gain
difference of individual gain
transfer function of the system is defined as the ratio of laplace output to laplace input considering initial condition __________.
0
1
infinite
2
transfer function of the system is defined as the ratio of laplace output to laplace input considering initial condition __________.
0
1
infinite
2
if two blocks G1 AND G2 are connected in parallel with +ve signal, then total gain is
G1 +G2
G1.G2
G1/G2
NONE
The transfer function GP=4s2+14s is:
Stable with oscillations
Unstable with oscillations
Stable without oscillations
Unstable with oscillations
The transfer function GP=s2−93 is:
Stable with oscillations
Unstable with oscillations
Stable without oscillations
Unstable without oscillations
The transfer function GP=s2−25s is:
Stable with oscillations
Unstable without oscillations
Stable without oscillations
Unstable with oscillations
