The ratio of amplitude of voltage oscillation to the amplitude of current
oscillation in a LC circuit zero-input response is
Phase modifier is normally installed in________.
The most appropriate way of mitigating the problem of interference
between power line and communication line is to :
For which of the following the excitation
control method is satisfactory?
In transmission line, series
capacitors are used to
Disturbance due to adjacent power line is called
The________reactive power :
If transmission line reactance X
and resistance
Capacitors and Reactors are used in transmission systems to control
voltage as given below. Select the correct choice :
Which of the following is NOT a static compensation equipment for
transmission lines?
The capacity of a static VAR compensator to be installed at a bush with ± 5%
voltage fluctuations is , if the short circuit capacity is 7000 MVA.
The
radial distribution is simple and economical, but the reliability of the system
is poor and leads to
When
a ring main feeder is energized by two or more substations or generating
stations, it is known as the
Which distribution system is more reliable?
Why is a ring main distribution system preferred to a radial system?
1.
Voltage drop in the feeder is less.
2.
Power factor is higher.
3.
Supply is more reliable
Select
the correct answer using the code given below :
The main criteria for selection of size of a distributor for radial
distribution system is
It is used in panels for switch gear and arcing device.
Neutral
is a circuit conductor that normally carries________back to the source.
For
the same voltage drop, increasing the voltage of a distributor n-times :
Which
of the following is not the distribution system normally used
In transmission system a feeder feeds power to
For
the same value of active power consumption at the receiving end of a feeder, if
the power factor at receiving end decreases, the copper losses in the feeder
will,
The
X/R ratio for distribution lines is.
If
the distribution voltage is raised from 11 kV to 33 kV, the line loss would be
:
If
distribution of power is raised from 11000 V to 66000 V, the voltage drop would
lower by
Which of the following keeps the poles straight
Which of the following is not a part of overhead distribution line
The
radial system of power distribution is used for
The
type of distributor used in residential area is normally
For
two parallel feeders, the load shared by each feeder will be
The
minimum height of the lowest conductor of a 400 V line, passing along the road
shall be above the ground
Out
door switchgear is generally used for i voltage beyond :
The
minimum height of lowest conductor of a 1 33 KV crossing the road should be
above the ground
In
a distribution system, major cost is that of :
For
a four-storied building, the service mains will provide
In case of large multi stored building the most economical distribution
system is
In
ring main distribution systems, rag distributor is fed
Which
of the following voltage level is a valid secondary voltage distribution
system?
The
major advantage of a radial distribution system is.
When an overhead connection is to be a single story building using G.I.
pipe is required to be supported by
Which
of the following is INCORRECT regarding the classification of substations on
the basis of operating voltage?
The
400 V distribution lines are commonly known as :
For
secondary distribution, the transformer(s) used is/are
In high voltage distribution of power, the system voltage is :
Which
of the following is connected in series with the feeder?
Which material is used for wiring continuous bus bar?
i.
Aluminium
ii.
Copper
Which among these is a part of distribution system?
A.
Feeders
B.
Distributors
C.
Service mains
What
is the most simple electrical indicating instrument used on a control panel?
Which
of the following distribution system is used for combined power and lightning
load?
The criterion for selection of size of conductor for a feeder
is________.