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WorksheetsCONTROL SYSTEM UNIT 1
Total questions: 43
Worksheet time: 22mins
Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output?
Input Signal
Outputsignal
Error Signal
Feedback Signal
Which among the following is not an advantage of an open loop system?
Simplicity in construction & design
Easy maintenance
Rare problems of stability
Requirement of system recalibration from time to time
Which notation represents the feedback path in closed loop system representation?
b(t)
c(t)
e(t)
r(t)
Which among the following represents an illustration of closed loop system?
Automatic washing machine
Automatic electric iron
Bread toaster
Electric hand drier
How is an output represented in the control systems?
r(t)
c(t)
x(t)
y(t)
in Which type of control system the control action is somehow dependent on the output?
Closed loop system
Semiclosed loop system
Open system
None of the above
What is the Control action 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 good control system has all the following features except___________
good stability
slow response
good accuracy
sufficient power handling capacity
car is running at a constant speed of 50 km/h, which of the following is the feedbackelement for the driver ?
Clutch
Eyes
Needle of the speedometer
Steering wheel
An automatic toaster is an example of which type of control system?
open
Close
Partially closed
any of the above
A closed loop system is distinguished from open loop system by which of the following ?
Servomechanism
Feedback
Output pattern
input pattern
By which of the following the control action is determined when a man walks along apath ?
Brain
Hands
Legs
Eyes
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
When the initial conditions of a system are specified to be zero it implies that the system is?
input reference signal is zero
zero stored energy
no initial movement of moving parts
Zero initial condition -system is at rest and no energy is stored in any of its components
Which of the following feedback system is used to reduce the error between reference input & feedback input
Open Loop Control System
Positive Feedback control system
Negative feedback control system
None of the above
T=G/(1+GH) is the Transfer function of which of the following type of the control system
Open Loop Control System
Positive Feedback control system
Negative feedback control system
None of the above
What type of feedback is preferred in Closed loop control system?
Positive Feedback
Negative feedback
None of the above
Feed forward
What is a Transfer Function?
Linear and time invarient system
Linear and time varient system
NonLinear and time invarient system
NonLinear and time varient system
The Transfer Function of a system can be used to study its
Transient behavoiur only
Steady state behaviour only
Transient and steady state behaviour only
none of these
Which of the following is one of the basic element of Electrical Based System?
Spring
resistor
mass
damper
Which of the following element is not an Electrical Based System?
Resistor
Spring
Capacitor
Inductor
Which of the following is one of the basic element of Mechanical Based System?
Resistor
Capacitor
Inductor
Mass
Which among the following are the elements of rotational motion?
Mass, Spring, Friction
Inertia, Damper, Spring
Work, Energy, Power
Force, Pressure, Viscocity
By using which of the following elements, mechanical translational systems are obtained?
mass element
spring element
dash-pot
all of the above
What is a Force balancing equation of a mass element ?
M d2x/dt2
M dx/dt
M *x
NONE of the above
What is a Force balancing equation of a dash-pot element?
B d2x/dt2
B dx/dt
B *x
none of the above
What is a Force balancing equation for elastic element (K) ?
K d2x/dt2
K dx/dt
K *x
none of the above
The translator mechanical system motion is along
curve
straight line
circle
none of these
The rotational mechanical system motion is about
Variable axis
fixed axis
variable line
fixed line
Which of the following is the analogous quantity for mass element in force-voltage analogy?
Resistance.
Inductance.
Capacitance.
All of the above.
Electrical analogous quantity for spring element (K) in force-voltage analogy is________
L
R
1/C
C
In force-current analogy, electrical analogous quantity for displacement (x) is___________
voltage.
inductance.
capacitance.
flux.
34
Electrical analogous quantity for dash-pot in force-current analogy is__________
resistance.
conductance.
inductance.
capacitance.
Which of the following is the electrical analogous element for displacement in force-voltage analogy?
Flux.
Voltage.
Charge.
Current.
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?
Velocity (v) ----------------- Voltage (V)
Force (f) --------------------- Current (i)
Spring element (K) --------- Inverse inductance (1/L)
all of the above
Electrical analogous element for damper element (force-voltage analogy) in mechanical translation system is__________
capacitor
inductor
resistor
none of the above
How do you Control the Speed of a DC Motor?
Armature Voltage and Flux.
Armature Voltage
Flux
Field Current
What is the Transfer Function of Armature controlled DC motor under ZERO initial condition in terms of Laplace transform?
Laplace Transform Armature Voltage/Laplace Transform Angular Displacement
Laplace Transform Angular Displacement/Laplace Transform Armature Voltage
Laplace transform Armature Voltage/Laplace transform Field Current
Laplace Transform Angular Displacement/Laplace Transform Armature current
What is the Transfer Function of Field controlled DC motor under ZERO initial condition in terms of Laplace transform?
Laplace Transform (Angular Displacement)/Laplace Transform (Field Voltage)
Laplace Transform Angular Displacement/Laplace Transform Armature current
Laplace Transform (Angular Displacement)/Laplace Transform (Field Voltage)
Laplace transform Armature Voltage/Laplace transformField Current
The output signal is fed back at the input side from the _________point
Summing
Differential
Take-off
All of the above
Which type of the following connection is called as Cascade connection in blocks?
Series
Parallel
Feedback
series
While shifting a take-off point after the summing point, which among the following should be added?
Summing point in series with take-off point
Summing point in parallel with take-off point
Block of reciprocal transfer function
Block of inverse transfer function
If two blocks having gains A and B respectively are in parallel connection, find the resultant gain using block diagram reduction technique?
A+B
A*B
A/B
2(A+B)
