Question is ⇒ Which of the following equipment is used to limit short-circuit current level in a substation ?, Options are ⇒ (A) Isolator, (B) Lightning switch, (C) Coupling capacitor, (D) Series reactor, (E) , Leave your comments or Download question paper.

Question is ⇒ Which of the following equipment is used to limit short-circuit current level in a substation ?, Options are ⇒ (A) Isolator, (B) Lightning switch, (C) Coupling capacitor, (D) Series reactor, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Which of the following equipment is used to limit short-circuit current level in a substation ?
A.	Isolator [Wrong Answer]
B.	Lightning switch [Wrong Answer]
C.	Coupling capacitor [Wrong Answer]
D.	Series reactor [Correct Answer]
View Answer 35 -14 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ The distributors for residential areas are
single phase
three-phase three wire
three-phase four wire
none of the above

⇒ The material commonly used for sheaths of underground cables is
lead
rubber
copper
iron

⇒ A booser is connected in
parallel with earth connection
parallel with the feeder
series with the feeder
series with earth connection

⇒ Solid grounding is adopted for voltages below
100 V
200 V
400 V
660 V

⇒ If variable part of a.nnual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as
Kelvin's law
Ohm's law
Kirchhoffs law
Faraday's law

⇒ When the interconnector between two stations has large reactance
the transfer of power will take place with voltage fluctuation and noise
the transfer of power will take place with least loss
the stations will fall out of step because oflarge angular displacement, between the stations
none of the above

⇒ The effect of wind pressure is more predominant on
supporting towers
neutral wires
transmission lines
insulators

⇒ The voltage regulation in magnetic amplifier type voltage regulator is effected by
electromagnetic induction
varying the resistance
varying the reactance
variable transformer

⇒ The wooden poles well impregnated with creosite oil or any preservative compound have life
from 2 to 5 years
10 to 15 years
25 to 30 years
60 to 70 years

⇒ By which of the following methods string efficiency can be improved ?
Using a guard ring
Grading the insulator
Using long cross arm
Any of the above

⇒ A circuit is disconnected by isolators when
line is energized
there is no current in the line
line is on full load
circuit breaker is not open

⇒ A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
one-fourth
one-third
one-half
twice

⇒ The cause of damage to the lead sheath of a cable is
crystallisation of the lead through vibration
chemical action on the lead when buried in the earth
mechanical damage
all of the above

⇒ As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
31.25 percent of copper
33.3 percent of copper
66.7 percent of copper
125 percent of copper

⇒ Distribution lines in India generally use
wooden poles
R.C.C. poles
steel towers
none of the above

⇒ Corona usually occurs when the electrostatic stress in air around the conductor exceeds
6.6 kV (r.m.s. value)/cm
11 kV (r.m.s. value)/cm
22 kV (maximum value)/cm
30 kV (maximum value)/cm

⇒ Which of the following has least effect on corona ?
Atmospheric temperature
Number of ions
Size and charge per ion
Mean free path

⇒ The colour of the neutral of three-core flexible cable is
blue
brown
red
black

⇒ The voltage of the single phase supply to residential consumers is
110 V
210 V
230 V
400 V

⇒ Basically the boosters are
synchronous motors
capacitors
inductors
transformers

⇒ Skin effect is proportional to
(conductor diameter)⁴
(conductor diameter)³
(conductor diameter)²
(conductor diameter)^1/2

⇒ The current drawn by the line due to corona losses is
non-sinusoidal
sinusoidal
triangular
square

⇒ Surge absorbers protect against ____ oscillations
high voltage high frequency
high voltage low frequency
low voltage high frequency
low voltage low frequency

⇒ If the height of transmission tower is increased
the line capacitance will decrease but line inductance will remain unchanged
the line capacitance and inductance will not change
the line capacitance will increase but line inductance will decrease
the line capacitance will decrease and line inductance will increase

⇒ Which of the following are connected by the service mains ?
Transformer and earth
Distributor and relay system
Distributor and consumer terminals
Distributor and transformer

⇒ A gay wire
protects conductors against shortcircuiting
provides emergency earth route
provides protection against surges
supports the pole

⇒ The square root of the ratio of line impedance and shunt admittance is called the
surge impedance of the line
conductance of the line
regulation of the line
none of the above

⇒ Transmission voltage of 11 kV is normally used for distances upto
20-25 km
40-50 km
60-70 km
80-100 km

⇒ If the height of transmission tower is increased, which of the following; parameters is likely to change ?
Capacitance
Inductance
Resistance
All of the above

⇒ The material used for the manufacture of grounding wires is
cast iron
aluminium
stainless steel
galvanised steel