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What is a safe distance from power lines?
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asked
Mar 10, 2018
by
anonymous
What is a safe distance from power lines?
safe
distance
power
lines
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asked
Mar 22, 2018
by
anonymous
Power for lighting in passanger coach, in a long distance electric train, is provided?
Last answer:
Power for lighting in passanger coach, in a long distance electric train, is provided through individual generator of bogie and batteries.
power
lighting
passanger
coach
long
distance
electric
train
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1
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asked
Aug 25, 2019
by
anonymous
Why is AC better for long distance power transmission than DC ?
Why is AC better for long distance power transmission than DC ?
Last answer:
ac is more economical to transmit for long distances . wires can be made smaller by step up transformer .. since major cost are wires to transmit .. then at the end of distance step down transformer is used for commercial use.
ac
long
distance
power
transmission
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4
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asked
Mar 22, 2018
by
anonymous
Overhead lines for power supply to tramcars are at a minimum height of?
Last answer:
Overhead lines for power supply to tramcars are at a minimum height of 10 m.
overhead
lines
power
supply
tramcars
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asked
May 22, 2020
by
anonymous
State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Last answer:
i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)
power
factor
short
transmission
lines
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asked
Aug 18, 2019
by
anonymous
Why don't we burry power lines underground ?
Why don't we burry power lines underground ?
Last answer:
Because conductor used for power transmission are not insulated and if we do so it create phase to ground fault causing interruptions to supply.
burry
power
lines
underground
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5
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asked
Apr 30, 2018
by
anonymous
In tuned power lines, on load :
In tuned power lines, on load : (A) the receiving end voltage is numerically equal to the sending end voltage (B) the receiving end current is numerically equal to the sending end current (C) there is no voltage drop (D) all the above
Last answer:
In tuned power lines, on load : (A) the receiving end voltage is numerically equal to the sending end voltage (B) the receiving end current is numerically equal to the sending end current (C) there is no voltage drop (D) all the above
tuned
power
lines
load
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asked
Mar 10, 2018
by
anonymous
How many volts are in the power lines?
How many volts are in the power lines?
volts
power
lines
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asked
Mar 11, 2018
by
anonymous
Is induction heating safe?
Is induction heating safe?
induction
heating
safe
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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
Apr 30, 2018
by
anonymous
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are :
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV
Last answer:
A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : lie between 66 kV and 110 kV
minimum
ground
overhead
lines
operating
voltages
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asked
Sep 4, 2018
by
anonymous
Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.
Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.
Last answer:
Magnetic Lines of force- These are the imaginary lines (having no physical existence) introduced by Faraday for the pictorial representation of the distribution of a magnetic field. OR A line of ... that the tangent at any point gives direction of the resultant force at that point.
define
magnetic
lines
force
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asked
Apr 28, 2018
by
anonymous
If a 5-bus test system contains 6 transmission lines and one transformer, how many non- zero elements are
If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19
Last answer:
If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.
test
system
contains
transmission
lines
transformer
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asked
May 1, 2018
by
anonymous
The purpose of guard ring in transmission lines is to
The purpose of guard ring in transmission lines is to (1) reduce the earth capacitance of the lowest unit. (2) increase the earth capacitance of the lowest unit. (3) reduce the transmission lines losses. (4) reduce the reactance of the line
Last answer:
The purpose of guard ring in transmission lines is to reduce the earth capacitance of the lowest unit.
guard
ring
transmission
lines
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asked
Apr 29, 2018
by
anonymous
Which of the following is the name given to the lines of electric force which move so that its beginning traces
Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity
Last answer:
Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative ... A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity
lines
electric
force
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1
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asked
Mar 20, 2018
by
anonymous
Series capacitors on transmission lines are of little use when the load VAR requirement is?
Last answer:
Series capacitors on transmission lines are of little use when the load VAR requirement is small.
series
capacitors
transmission
lines
use
load
var
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1
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asked
Mar 10, 2018
by
anonymous
Why ACSR conductor is used for overhead lines?
Why ACSR conductor is used for overhead lines?
Last answer:
It has high tensile strength
acsr
conductor
used
overhead
lines
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asked
May 22, 2020
by
anonymous
State the classification of transmission lines depending on length of transmission lines.
State the classification of transmission lines depending on length of transmission lines.
Last answer:
A) According to Voltage level: ( 2 Marks) a) High voltage Transmission Line (HV) up to 33 KV b) Extra High Voltage Transmission Line (EHV) above 33 KV up to 400 KV c) Ultra ... Transmission Line: - The length of Long transmission Line is above 200KM and its line voltage is above 100KV
classification
transmission
lines
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2
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asked
May 21, 2020
by
anonymous
Find out number of data lines required to interface 16 LEDs arrange in the 4 x 4 matrix form.
Find out number of data lines required to interface 16 LEDs arrange in the 4 x 4 matrix form.
Last answer:
4+4=8, eight lines are required for 4x4 matrix of 16 LEDs
data
lines
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1
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asked
Sep 17, 2019
by
Aishwarya ilp
Explain about cross arms in overhead lines
cross
arms-
overhead
lines
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asked
Aug 18, 2019
by
anonymous
Why are overhead transmission lines not insulated?
Why are overhead transmission lines not insulated?
Last answer:
Insulators are useful to help separate electrical conductors when they come into physical contact. Overhead Transmission Lines Are Not Insulated: The overhead transmission line is carrying extreme high voltage and ... a whole lot of thick insulation to absorb the heat produced by such high voltage.
overhead
transmission
lines
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114
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7
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asked
Aug 8, 2018
by
anonymous
Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.
Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.
Last answer:
Magnetic linens of force is the imaginary lines for magnetic field of magnet around it. These magnetic lines of forces are introduced by Michael Faraday. The direction of lines of force is from N-pole to S-pole. The figure shows lines of force for bar type magnet.
magnetic
lines
force
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1
answer
asked
May 8, 2018
by
anonymous
In which of the following transmission lines, the value of the Shunt admittance should be
In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line
Last answer:
In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line
transmission
lines
shunt
admittance
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445
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1
answer
asked
Apr 28, 2018
by
anonymous
Corona loss in transmission lines can be reduced by
Corona loss in transmission lines can be reduced by (A) using small diameter conductors (B) using bundled conductors (C) using less spacing between conductors (D) increasing the transmission line voltage
Last answer:
Corona loss in transmission lines can be reduced by using bundled conductors
corona
loss
transmission
lines
reduced
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1
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asked
Apr 28, 2018
by
anonymous
A Unified Power Flow Controller (FACTS controller) is a voltage source converter based
A Unified Power Flow Controller (FACTS controller) is a voltage source converter based (A) Inter-phase power controller (B) Static Compensator (C) Combination of series and shunt compensators (D) Solid-state series compensator
Last answer:
A Unified Power Flow Controller (FACTS controller) is a voltage source converter based Combination of series and shunt compensators
unified
power
flow
controller
facts
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1
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asked
Apr 28, 2018
by
anonymous
In voltage source converter based HVDC transmission system the active power is controlled by changing
In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last answer:
In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage
voltage
source
converter
hvdc
transmission
system
active
power
controlled
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99
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1
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asked
Mar 10, 2018
by
anonymous
Is more power dissipated in series or parallel?
Is more power dissipated in series or parallel?
power
dissipated
series
parallel
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0
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asked
Mar 10, 2018
by
anonymous
Why high voltage is used in power transmission?
Why high voltage is used in power transmission?
Last answer:
The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmissionreduces resistance in the conductors aselectricity flows ... This means that thin, light-weight wires can beused in long-distance transmission.
high
voltage
power
transmission
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2
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asked
Mar 10, 2018
by
anonymous
How can power loss be reduced?
How can power loss be reduced?
power
loss
reduced
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asked
Mar 10, 2018
by
anonymous
How do you calculate power loss?
How do you calculate power loss?
calculate
power
loss
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0
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asked
Mar 10, 2018
by
anonymous
Why high voltage can reduce power loss?
Why high voltage can reduce power loss?
Last answer:
when voltage has increased due to reduced current flow, thus power loss given by ( I^2R) will be low due to reduced current(I^2) provided that resistance (R) is constant.
high
voltage
reduce
power
loss
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1
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asked
May 17, 2020
by
anonymous
What is the value of capacitance required to improve power factor from 0.7 to 0.9.
What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz #powerfactor
factor
power
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asked
Mar 25, 2018
by
anonymous
"Maximum power output is obtained from a network when the load resistance...
"Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with?
Last answer:
"Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with Maximum power transfer theorem.
maximum
power
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1
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asked
Apr 9, 2018
by
anonymous
When the communication line run parallel to the power lines in close proximity ...
When the communication line run parallel to the power lines in close proximity P. The electromagnetic effect produces current due to induction resulting its superposition on the speech signal of the communication line causing distortion Q. The electrostatic effect raises the potential of the communication circuit as a whole and thereby posing a threat of damage to the ... lines Which of the following combinations is valid? A) R only B) P, Q & R C) P & Q only D) P & R only
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0
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asked
Mar 26, 2018
by
anonymous
In a d.c. motor, the mechanical output power actually comes from?
In a d.c. motor, the mechanical output power actually comes from?
Last answer:
In a d.c. motor, the mechanical output power actually comes from electrical input power.
mechanical
power
motor
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585
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1
answer
asked
Mar 25, 2018
by
anonymous
Pure inductive circuit takes power from the A.C. line when?
Pure inductive circuit takes power from the A.C. line when?
Last answer:
It takes power when voltage decreases and current increases.
pure
inductive
circuit
power
ac
line
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909
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2
answers
asked
Aug 2, 2020
by
anonymous
If all the lines in the image below are of the same length but of different thickness and are drawn in perspective with respect to their distance from the viewer, which of the following statements will be TRUE?
Last answer:
A D
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29
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1
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asked
Mar 10, 2018
by
anonymous
How does electricity get from the power plant to your home?
How does electricity get from the power plant to your home?
Last answer:
Electricity gets into my home due to potential diffrence created between the live wire and neutral wire.
electricity
power
plant
home
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92
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1
answer
asked
Mar 8, 2018
by
anonymous
How to make power bank from laptop battery cells?
How to make power bank from laptop battery cells?
Last answer:
You can make the power bank from laptop battery cells. Things you need to make power bank from laptop battery cells: Laptop battery cells (about 6 in parallel) Universal Dual USB 5V 1A 2.1A New Hot ... If you have any doubt ask it. Thanks...
make
power
bank
laptop
battery
cells
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216
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1
answer
asked
Apr 29, 2018
by
anonymous
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
Last answer:
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
power
factor
single
phase
watt
meter
operating
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136
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1
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asked
Mar 10, 2018
by
anonymous
What is a high tension power line?
What is a high tension power line?
Last answer:
High tension power line is a high voltage of 115 kv and power line is underground transimissio used by urbun areas
high
tension
power
line
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70
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2
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asked
Mar 10, 2018
by
anonymous
What is a digital power meter?
What is a digital power meter?
digital
power
meter
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48
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0
answers
asked
Mar 10, 2018
by
anonymous
What is a power quality analyzer?
What is a power quality analyzer?
power
quality
analyzer
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434
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0
answers
asked
Aug 1, 2020
by
anonymous
What is the shortest distance (in cm) for the red dot to reach the position x? The dot can travel only along the grid lines shown.
Last answer:
18
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1
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asked
May 8, 2018
by
anonymous
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be excessive (B) Current will be too much high (C) Transformer may start to smoke and burn (D) No effect
Last answer:
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... will be too much high (C) Transformer may start to smoke and burn (D) No effect
power
transformer
designed
operation
frequency
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495
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1
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asked
Mar 10, 2018
by
anonymous
What can you do to prevent a power surge?
What can you do to prevent a power surge?
prevent
power
surge
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51
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0
answers
asked
Mar 10, 2018
by
anonymous
What would cause a power surge in a house?
What would cause a power surge in a house?
Last answer:
If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip
cause
power
surge
house
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70
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1
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asked
Mar 10, 2018
by
anonymous
What are the components of a power system?
What are the components of a power system?
Last answer:
generator Traansformer Conductors Insulators
components
power
system
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69
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1
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asked
Apr 1, 2018
by
anonymous
if the rated voltage from the power lines is applied to the primary of a single-phase transformer...
if the rated voltage from the power lines is applied to the primary of a single-phase transformer which is operated on no-load, then
Last answer:
if the rated voltage from the power lines is applied to the primary of a single-phase transformer which is operated on no-load, then input voltage is sinusoidal and input current is non sinusoidal.
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1
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asked
Jun 28, 2019
by
anonymous
What is the unit of electric power?
Options: A) WATT B) AMPERE C) VOLTS D) OHM
Last answer:
Correct Answer: A) WATT
electric
power
unit
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1
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asked
Nov 6, 2018
by
Power system
What is power serving in e-motors
power
system
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...