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WorksheetsControl System Prractice Quiz 1
Total questions: 54
Worksheet time: 54mins
Name
Class
Date
1.
In which type of control system the control action is somehow dependent on the output?
a)
Closed loop system
b)
Semi closed loop system
c)
Open system
d)
None of the above
2.
How an output is represented in the control systems?
a)
r(t)
b)
c(t)
c)
x(t)
d)
y(t)
3.
What is the control action in open loop system?
a)
The control action depends on the size of the system
b)
The control action depends on system variables
c)
The control action depends on the input signal
d)
The control action is independent of output
4.
A good control system has all the following features except ________
a)
Good stability
b)
Slow response
c)
Good accuracy
d)
ufficient power handling capacity
5.
A closed loop system is distinguished from open loop system by which of the following?
a)
Servo mechanism
b)
Feedback
c)
Output pattern
d)
Input pattern
6.
Transfer function of a system is used to calculate which of the following?
a)
The order of the system
b)
The time constant
c)
The output for any given input
d)
The steady state gain
7.
When the initial conditions of a systems are specified to be zero, it implies that the system is
a)
Input reference signal is zero
b)
Zero stored energy
c)
No initial movement of moving parts
d)
Zero initial condition system is at rest and no energy is stored in any of its components
8.
Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output?
a)
Input signal
b)
Output signal
c)
Error signal
d)
Feedback signal
9.
Which among the following is not an advantage of an open loop system?
a)
Simplicity in construction & design
b)
Easy maintenance
c)
Rare problems of stability
d)
Requirement of system recalibration from time to time
10.
Which notation represents the feedback path in closed loop system representation?
a)
b(t)
b)
c(t)
c)
e(t)
d)
r(t)
11.
Which among the following represents an illustration of closed loop system?
a)
Automatic washing machine
b)
Automatic electric iron
c)
Bread toaster
d)
Electric hand drier
12.
Which of the following feedback system is used to reduce the error between reference input & feedback input.
a)
Open loop system
b)
Positive feedback control system
c)
Negative feedback control system
d)
None of the above
13.
What type of feedback is preferred in closed loop control system?
a)
Positive feedback
b)
Negative feedback
c)
None of the above
d)
Feed forward
14.
What is a force balancing equation of a mass element?
a)
M d2x/dt2
b)
M dx/dt
c)
M* x
d)
Any of the above
15.
What is the force balancing equation of a dash-pot element?
a)
B d2x/dt2
b)
B dx/dt
c)
B * x
d)
None of the above
16.
What is a force balance equation for elastic element (K)?
a)
K d2x/dt2
b)
K dx/dt
c)
K * x
d)
None of the above
17.
The translator mechanical system motion is along
a)
Curve
b)
Straight line
c)
Circle
d)
None of the above
18.
Transfer function is applicable for
a)
Linear & time invariant system
b)
Linear & time variant system
c)
Nonlinear & time invariant system
d)
Nonlinear & time variant system
19.
The transfer function of a system can be used to study its
a)
Transient behavior only
b)
Steady state behavior only
c)
Transient & steady state behavior
d)
None of these
20.
Which of the following is one of the basic element of electrical based system?
a)
Spring
b)
Resistor
c)
Mass
d)
Damper
21.
Which of the following element is not an electrical based system?
a)
Resistor
b)
Spring
c)
Capacitor
d)
Inductor
22.
Which of the following is one of the basic element of mechanical based system?
a)
Resistor
b)
Capacitor
c)
Inductor
d)
Mass
23.
Which of the following system is used to minimize the vibrations of the system?
a)
Resistor
b)
Mass
c)
Spring
d)
Dashpot
24.
Which among the following are the elements rotational motion?
a)
Mass, spring, friction
b)
Inertia, damper, spring
c)
Work, energy, power
d)
Force, pressure, viscosity
25.
By using which of the following elements, mechanical translational systems are obtained?
a)
Mass element
b)
Spring element
c)
Dash-pot
d)
All of the above
26.
The rotational mechanical system motion is about
a)
Variable axis
b)
Fixed axis
c)
Variable line
d)
Fixed line
27.
Which of the following is the analogous quantity for mass element in force-voltage analogy?
a)
Resistance
b)
Inductance
c)
Capacitance
d)
All of the above
28.
Electrical analogous quantity for spring element (K) in force-voltage analogy is ____________
a)
L
b)
R
c)
1/C
d)
C
29.
In force-current analogy, electrical analogous quantity for displacement (X) is ______________
a)
Voltage
b)
Inductance
c)
Capacitance
d)
Flux
30.
Electrical analogous quantity for dash-pot in force-current analogy is ______________
a)
Resistance
b)
Conductance
c)
Inductance
d)
Capacitance
31.
Which of the following is the electrical analogous element for displacement in force-voltage analogy?
a)
Flux
b)
Voltage
c)
Charge
d)
Current
32.
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?
a)
Velocity (v) – Voltage (V)
b)
Force (f) -- Current (i)
c)
Spring element (k) – inverse inductance (1/L)
d)
All of the above
33.
Electrical analogous element for damper element (force-voltage analogy) in mechanical translation system is _________________
a)
Capacitor
b)
Inductor
c)
Resistor
d)
Any of the above
34.
What is the transfer function of armature controlled DC motor under zero initial condition in terms of Laplace transform?
a)
Laplace transform of armature voltage/ Laplace transform of angular displacement
b)
Laplace transform of angular displacement / Laplace transform of armature voltage
c)
Laplace transform of armature voltage/ Laplace transform of field current
d)
Laplace transform of angular displacement / Laplace transform of armature current
35.
The output signal is feedback at the input side from the __________________ point
a)
Summing
b)
Differential
c)
Take-off
d)
All of the above
36.
Which type of the following connection is called as cascade connection in blocks?
a)
Series
b)
Parallel
c)
Feedback
d)
Both A&B
37.
While shifting a take-off point after the summing point, which among the following should be added?
a)
Summing point in series with take-off point
b)
Summing point in parallel with take-off point
c)
Block of reciprocal transfer function
d)
Block of inverse transfer function
38.
In an automatic control system which of the following element is not used?
a)
Error detector
b)
Final control element
c)
Sensor
d)
Oscillator
39.
In a control system the output of the controller is given to
a)
Final control element
b)
Amplifier
c)
Comparator
d)
Sensor
40.
Which one of the following is used as an error detector in control system?
a)
Potentiometer
b)
DC motor
c)
Servomotor
d)
Comparator
41.
Which of the following is not a final control element
a)
Control valve
b)
Potentiometer
c)
Electro-pneumatic converter
d)
Servomotor
42.
The device which converts linear displacement into voltage is called ______________
a)
Translational potentiometer
b)
Rotational potentiometer
c)
Potentiometer
d)
Dc motor
43.
The device which converts rotational displacement into voltage is called ______________
a)
Translational potentiometer
b)
Rotational potentiometer
c)
Potentiometer
d)
Dc motor
44.
Derivative controller is also known as
a)
Reset controller
b)
Rate controller
c)
Gain controller
d)
Two term controller
45.
What does a proportional plus derivative controller do?
a)
Has high sensitivity
b)
Increases the stability of the system
c)
Improves the steady state accuracy
d)
Both A&B
46.
The on-off controller is a ________________ system
a)
Digital
b)
Linear
c)
Non Linear
d)
Discontinuous
47.
Which controller has the potential to eliminate/overcome the drawback of offset in proportional controllers?
a)
P-I
b)
P-D
c)
Both A & B
d)
None of the above
48.
In P-D controller, the derivative action plays a significant role in increasing ______________ of response
a)
Time
b)
Distance
c)
Speed
d)
Volume
49.
Which of the following is/are the example of actuator?
a)
Pneumatic Motor
b)
Hydraulic Motor
c)
Electric Motor
d)
All of the above
50.
Which of the following is the input to a controller?
a)
Servo signal
b)
Desired variable value
c)
Error signal
d)
Sensed signal
51.
A controller essentially is a _____________
a)
Sensor
b)
Clipper
c)
Comparator
d)
Amplifier
52.
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
53.
PID controller is also known as ______________
a)
Two term controller
b)
Three term controller
c)
Four term controller
d)
Proportional controller
54.
Integral controller is also known as ________________
a)
Reset controller
b)
Rate controller
c)
Gain controller
d)
Two term controller
Reset
