Changes of
corona are maximum during :
Which one of
the followings does not have an effect on corona?
Corona is
accompanied by :
Conductors
experience skin effect in _______ ?
Bundled
conductors are used to:
The effect
owing to which a conductor carries more current on the surface as compared to
the core is known as :
The highest
AC voltage transmission line in India is
:
Which of the following is NOT a disadvantage of EHV lines?
Which of the
following is NOT a valid advantage of underground system of electrical
distribution as compared to overhead system?
Electricity
supply systems are invariably three-phase and they are so designed and loaded
that the operation is
If voltage is
increased by 'n'
If the
transmission voltage of a line increases, then the volume of the conductor
material required :
An 800 kV
transmission line has a maximum power transfer capacity of P. If it is operated
at 400 kV with the series reactance unchanged, the new maximum power transfer
capacity is approximately_________.
The highest
voltage transmission line starting from generating point is called________.
_________electric
power is the most common method used by electrical grids to transfer power.
The effective resistance of a conductor will be the same as ohmic resistance when
As the voltage transmission increases, the volume of conductor
By which of
the following systems electric power may be transmitted?
Most of the high voltage transmission lines in India are
For higher Voltage three phase transmission
Transmission
lines and distribution lines can be discriminated by :
With the increase in the voltage and pf, the transmission line conductor
cost
Among the
following statements which one is true?
From the
step-up sub-station, electric power at 220 kV is transmitted to the outskirts
of the city by
If the
distribution voltage is raised from 11 kV to 33 kV, the line loss would be :
Which of the following systems of distribution offers the best economy
at high voltages?
Which of the
following conditions leads to increase in transmission efficiency?
The domestic
supply voltage of 220 V represents the
Which of the
following system is used in the secondary transmission of electric power?
Choose the
INCORRECT statement with respect to DC transmission systems.
If the
transmission voltages increased K times, the size of conductor will
Which of the
following is a type of distribution system according to the nature of current.
What is the
main drawback of the underground transmission system compared to the overhead
transmission system?
In
transmission system, the cost of lost energy is_________.
In a 3 phase
transmission line, transmission efficiency increases when :
Power is to
be transmitted over a large distance, say, 200 km. The requisite transmission
voltage must be
Transmitting power at high voltage requires more_________.
66 kV is suitable for transmission of power over_________.
The
transmission line feeding power on either side of the main transmission line is
called_________.
The transmission lines which feed different sub-stations
represent________.
What is the
main consideration for higher and higher operating voltage of transmission?
Three-phase
AC supply system compared to single-phase AC supply system has the advantage
In a 60km underground power transmission system, the best transmission
system is :
________system
is universally adopted for a generation, transmission and distribution of
electric power.
For long
distance line, voltage is measured in :
Which of the following is NOT a standard transmission voltage?
In a
transmission system, a feeder feeds power to :
Which of the
following is the main advantage of [transmitting power over transmission lines
on high voltage?
The advantage
of cables over overhead lines is
The highest AC transmission voltage used in India at present is