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What is the automatic control system?
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Mar 10, 2018
by
anonymous
What is the automatic control system?
automatic
control
system
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asked
Jul 21, 2019
by
anonymous
Draw and explain schematic of PLC based automatic car parking barrier system.
Draw and explain schematic of PLC based automatic car parking barrier system.
Last answer:
Explanation: Automatic car parking system allow to park maximum numbers of car in parking zone according to size of parking zone. parking zone number of vehicle parked in parking zone is less ... available parking space then automated parking system does not allow enter next car in parking zone.
plc
automatic
car
parking
barrier
system
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Mar 10, 2018
by
anonymous
What are the advantages of open loop control system?
What are the advantages of open loop control system?
Last answer:
Open loop control system are simple to design. Open loop control system are generally stable.
advantages
open
loop
control
system
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asked
Apr 28, 2018
by
anonymous
A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the
A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1
Last answer:
A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.
unity
negative
feedback
control
system
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asked
Apr 30, 2018
by
anonymous
A differentiator is not usually used in control system, because it : -
A differentiator is not usually used in control system, because it : - (A) reduces damping (B) increases error (C) reduces gain margin (D) increases input noise
Last answer:
A differentiator is not usually used in control system, because it : - increases input noise
differentiator
used
control
system
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asked
Jun 28, 2020
by
anonymous
Draw the labeled block diagram of process control system and explain each block.
Draw the labeled block diagram of process control system and explain each block.
Last answer:
Explanation - Process control system consists of process or plant, sensor, error detector, automatic Controller, actuator or control element. 1) Process or plant- process means some manufacturing sequence ... process which changes the process variable. Output of this block is denoted by u .
block
diagram
process
control
system
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asked
Apr 26, 2018
by
anonymous
Negative feedback in a closed-loop control system DOES NOT
Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation
Last answer:
Negative feedback in a closed-loop control system DOES NOT reduce bandwidth
negative
feedback
closed-loop
control
system
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asked
Mar 10, 2018
by
anonymous
What is the difference between a line voltage and low voltage control system?
What is the difference between a line voltage and low voltage control system?
difference
between
line
voltage
low
control
system
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Jul 4, 2019
by
anonymous
What are the disadvantages of Open loop control system?
What are the disadvantages of Open loop control system?
Last answer:
Open loop control system are less reliable. In open loop control system Optimization is not possible. Open loop control system are less accurate.
open
loop
system
control
disadvantages
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asked
May 1, 2018
by
anonymous
A control system having unit damping factor will give
A control system having unit damping factor will give (1) Oscillatory response (2) Undamped response (3) Critically damped response (4) No response
Last answer:
1
control
system
unit
damping
factor
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2
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asked
Mar 10, 2018
by
anonymous
What is control and automation?
What is control and automation?
control
automation
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asked
Mar 10, 2018
by
anonymous
What are the different types of control systems?
What are the different types of control systems?
different
types
control
systems
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asked
Sep 26, 2017
by
anonymous
6.30 Consider the state variable model.
Problem number 6.30 from digital control and state variable methods by M Gopal (second edition)
Last answer:
Solution for 6.30
6
30
solution
control
system
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asked
Apr 26, 2018
by
anonymous
The standard for long distance analog signal transmission in process control industry is
The standard for long distance analog signal transmission in process control industry is (A) 4-20 mV (B) 0-20 mA (C) 4-20 mA (D) 0-5 V
Last answer:
The standard for long distance analog signal transmission in process control industry is 4-20 mA
standard
long
distance
analog
signal
transmission
process
control
industry
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asked
Mar 27, 2018
by
anonymous
An automatic toaster is a ______ loop control system.
An automatic toaster is a ______ loop control system.
Last answer:
An automatic toaster is an open loop control system.
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asked
Jun 18, 2018
by
anonymous
What will happen to the gain margin if the gain of the open loop system is doubled?
What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth
Last answer:
What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth
gain
margin
open
loop
system
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145
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1
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asked
Jun 18, 2018
by
anonymous
What is the time response of a system whose poles lie on the right hand side of s-plane?
What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response
Last answer:
What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response
time
response
system
poles
right
hand
side
s-plane
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71
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1
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asked
Mar 10, 2018
by
anonymous
What is a servomechanism system?
What is a servomechanism system?
servomechanism
system
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asked
Mar 10, 2018
by
anonymous
What is an example of an open loop system?
What is an example of an open loop system?
Last answer:
Open loop system. Ex. Electric heater, washing machine, fan, electric switch, etc
example
open
loop
system
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asked
Mar 10, 2018
by
anonymous
What are some examples of a closed loop system?
What are some examples of a closed loop system?
Last answer:
C.L s/m. EX. Air conditioner (AC), rocket launcher, radar system, voltage stabilizer etc.
examples
closed
loop
system
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asked
Mar 19, 2018
by
anonymous
What is a phase control thyristor?
What is a phase control thyristor?
phase
control
thyristor
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asked
Dec 16, 2017
by
anonymous
What is HT and LT control panels?
What is HT and LT control panels?
Last answer:
HT Panel is like LT Panel except that it is used for high tension cables. LT Panels :LT Panel is an electrical distribution board that receives power from generator or transformer and distributes the same to various electronic devices and distribution boards.
ht
lt
control
panels
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82
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1
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asked
Mar 10, 2018
by
anonymous
What are the electromagnetic waves used in remote control?
What are the electromagnetic waves used in remote control?
electromagnetic
waves
used
remote
control
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asked
Dec 16, 2017
by
anonymous
What are the speed control methods of dc motor?
What are the speed control methods of dc motor?
Last answer:
Field control of DC motor Armature control of DC motor
speed
control
methods
dc
motor
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2
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asked
May 8, 2018
by
anonymous
Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is
Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is
Last answer:
Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is 16
unity
feedback
system
damping
ratio
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asked
Apr 30, 2018
by
anonymous
Phase margin is the amount of angle to make the system
Phase margin is the amount of angle to make the system (1) Oscillatory (2) Stable (3) Unstable (4) Exponential
Last answer:
Phase margin is the amount of angle to make the system Unstable
phase
margin
amount
angle
make
system
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1
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asked
Apr 30, 2018
by
anonymous
If the gain of the open loop system is doubled, the gain margin
If the gain of the open loop system is doubled, the gain margin (1) Is not affected (2) Gets doubled (3) Becomes half (4) Becomes one -forth
Last answer:
If the gain of the open loop system is doubled, the gain margin Becomes half
open
loop
system
doubled
gain
margin
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347
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1
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asked
Apr 28, 2018
by
anonymous
In Torque-Voltage analogy, the Moment of Inertia of a mechanical rotational system is analogous to
In Torque-Voltage analogy, the Moment of Inertia of a mechanical rotational system is analogous to (A) Capacitance C. (B) Inductance L. (C) Resistance R. (D) Inductive reactance XL
Last answer:
In Torque-Voltage analogy, the Moment of Inertia of a mechanical rotational system is analogous to Inductance L.
torque-voltage
analogy
moment
inertia
mechanical
rotational
system
analogous
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308
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1
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asked
Apr 26, 2018
by
anonymous
The damping factor of a particular system is unity, the system response will be
The damping factor of a particular system is unity, the system response will be
Last answer:
The damping factor of a particular system is unity, the system response will be critically damped
damping
factor
particular
system
unity
response
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170
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1
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asked
May 3, 2018
by
anonymous
A system is linear if and only if it satisfies
A system is linear if and only if it satisfies
Last answer:
A system is linear if and only if it satisfies principle of superposition and principle of homogeneity
system
linear
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69
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1
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asked
Apr 28, 2018
by
anonymous
Observability of a system is essential for
Observability of a system is essential for (A) finding a solution to the state equation. (B) finding a suitable model in state space. (C) transferring the state of the system from any initial value to any specified final value. (D) state estimation.
Last answer:
Observability of a system is essential for state estimation.
observability
system
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1
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asked
Apr 26, 2018
by
anonymous
Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is
Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is (A) causal & linear (B) non-causal & linear (C) causal & non-linear (D) non-causal & non-linear
Last answer:
Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is non-causal & linear
continuous-time
system
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asked
May 1, 2018
by
anonymous
How can the steady-state error in a system be reduced?
How can the steady-state error in a system be reduced? (1) By decreasing the type of system (2) By increasing system gain (3) By decreasing the static error constant (4) By increasing the input
Last answer:
How can the steady-state error in a system be reduced? (1) By decreasing the type of system (2) By increasing system gain (3) By decreasing the static error constant (4) By increasing the input
steady-state
error
system
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173
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1
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asked
Apr 26, 2018
by
anonymous
lf the poles of system are lying on the imaginary axis in s-plane, then the system will be
lf the poles of system are lying on the imaginary axis in s-plane, then the system will be
Last answer:
lf the poles of system are lying on the imaginary axis in s-plane, then the system will be marginally stable
poles
system
imaginary
axis
s-plane
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70
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1
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asked
Apr 26, 2018
by
anonymous
The steady state error of the system can be minimized by
The steady state error of the system can be minimized by
Last answer:
The steady state error of the system can be minimized by increasing gain k
steady
state
error
system
minimized
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80
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1
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asked
Jul 21, 2019
by
anonymous
Draw block diagram of pneumatic system showing its basic components. State the functions of control value and air actuator.
Draw block diagram of pneumatic system showing its basic components. State the functions of control value and air actuator.
Last answer:
Diagram : Control valve: - control and regulates the direction of flow and pressure etc. Air actuator: - Air cylinders and motors are used to obtain the required movements of direction flow.
pneumatic
system
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443
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1
answer
asked
Sep 22, 2018
by
anonymous
Describe the following energy conservation methods of lighting system. i) By replacing lamp sources ii) Using light control gears.
Describe the following energy conservation methods of lighting system. i) By replacing lamp sources ii) Using light control gears.
Last answer:
Energy conservation methods of lighting system: i) By replacing lamp sources: Installation of energy efficient fluorescent lamps in place of Conventional fluorescent lamps. Installation of ... (HF) electronic ballasts in place of conventional ballasts which saves energy up to 35%.
energy
conservation
methods
lighting
system
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1
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asked
Apr 28, 2018
by
anonymous
A second order system shows 100% overshoot in its unit step response. It can be categorized as
A second order system shows 100% overshoot in its unit step response. It can be categorized as (A) underdamped system. (B) overdamped system. (C) Critically damped system. (D) undamped system.
Last answer:
A second order system shows 100% overshoot in its unit step response. It can be categorized as undamped system.
second
order
system
overshoot
unit
step
response
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49
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1
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asked
May 1, 2018
by
anonymous
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last answer:
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases
speed
three-phase
induction
motor
controlled
variable
voltage
frequency
control
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118
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1
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asked
Apr 28, 2018
by
anonymous
The meter which does not have any component in it to provide control torque is
The meter which does not have any component in it to provide control torque is (A) Electrodynamometer for current measurement (B) Electrodynamometer for voltage measurement (C) Electrodynamometer for power measurement. (D) Electrodynamometer for power factor measurement.
Last answer:
The meter which does not have any component in it to provide control torque is Electrodynamometer for power factor measurement.
meter
control
torque
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118
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1
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asked
Mar 20, 2018
by
anonymous
The main disadvantage of the Ward-Leonard control method is?
Last answer:
The main disadvantage of the Ward-Leonard control method is high initial cost, high maintenance cost, low efficiency at light loads.
disadvantage
ward-leonard
control
method
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1
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asked
Mar 20, 2018
by
anonymous
In Ward-Leonard control the lower limit of speed is imposed by?
Last answer:
In Ward-Leonard control the lower limit of speed is imposed by residual magnetism of the generator.
ward-leonard
control
speed
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61
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1
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asked
Mar 20, 2018
by
anonymous
The speed control of universal motor used for sewing machines is by?
Last answer:
The speed control of universal motor used for sewing machines is by varying the resistance.
speed
control
universal
motor
used
sewing
machines
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70
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1
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asked
Aug 31, 2018
by
anonymous
Quality control is aimed at:
Quality control is aimed at: a. Maintaining the desired quality b. Exceeding the desired quality c. Continuously improving the quality d. Following the quality
Last answer:
Quality control is aimed at: a. Maintaining the desired quality b. Exceeding the desired quality c. Continuously improving the quality d. Following the quality
quality
control
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67
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1
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asked
Mar 20, 2018
by
anonymous
For constant torque drive which speed control method is preferred ?
Last answer:
For constant torque drive armature voltage control speed control method is preferred.
constant
torque
drive
speed
control
method
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88
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1
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asked
Mar 20, 2018
by
anonymous
Ward-Leonard control is basically a?
Last answer:
Ward-Leonard control is basically a voltage control method.
ward-leonard
control
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34
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1
answer
asked
Mar 20, 2018
by
anonymous
Usually wide and sensitive speed control is desired in case of?
Last answer:
Usually wide and sensitive speed control is desired in case of colliery winders.
sensitive
speed
control
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107
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1
answer
asked
Mar 20, 2018
by
anonymous
Speed control of a universal motor is achieved by?
Last answer:
Speed control of a universal motor is achieved by varying field flux with tapped field windings, connecting rheostat in series, applying variable voltage by means of silicon controlled rectifier, applying variable voltage by means of variable auto-transformer.
speed
control
universal
motor
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77
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1
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asked
May 3, 2020
by
anonymous
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Last answer:
Single lamp control from three places- It consists of two way switches & intermediate switch, the circuit diagram is as shown in figure. We require two 2-way switches and one intermediate switch and a lamp ... position of any one switch is changed, then the lamp will be turned off.
describe
control
of
a
single
lamp
from
three
places
draw
the
relevant
circuit
diagram
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1
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asked
May 3, 2020
by
anonymous
State the purpose of lighting control. List the different types of dimmer.
State the purpose of lighting control. List the different types of dimmer.
Last answer:
Purpose of Lighting Control:- 1. To turn ON or OFF the lamps 2. For dimming: The dimming control permits the adjustment of lighting over a range. 3. For changing the lighting levels ... operated dimmer 6) Triac operated Dimmer 7) PWM (Pulse width modulation) Controlled technique.
state
the
purpose
of
lighting
control
list
different
types
dimmer
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66
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1
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asked
Oct 13, 2019
by
anonymous
Speed control of the motor using TRIAC
Speed control of the motor using TRIAC
Last answer:
Speed control of the motor using TRIAC: This basic phase triggering circuit uses the triac in series with the motor across an AC sinusoidal supply. The variable resistor, VR1 is used ... meaning that it may not trigger at the exact same point for each positive and negative half cycle.
speed
control
motor
triac
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1
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...