The effect of corona can be detected by
The effect of corona can be detected by
Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system?
Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system?
Which of the following is not a constituent for making porcelain insulators?
Which of the following is not a constituent for making porcelain insulators?
The use of strain type insulators is made where the conductors are
The use of strain type insulators is made where the conductors are
The loads on distributors systems are generally
The loads on distributors systems are generally
The minimum clearance between the ground and a 220 kV line is about
The minimum clearance between the ground and a 220 kV line is about
The usual spans with R.C.C. poles are
The usual spans with R.C.C. poles are
The operating voltage of super-tension cables is up to
The operating voltage of super-tension cables is up to
If variable part of annual 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
If variable part of annual 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
310 km line is considered as
310 km line is considered as
Transmission line insulators are made of
Transmission line insulators are made of
Overhead system can be designed for operation up to
Overhead system can be designed for operation up to
The steel used in steel cored conductors is usually
The steel used in steel cored conductors is usually
As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
The power transmitted will be maximum when
The power transmitted will be maximum when
Which of the following methods is used for laying of underground cables?
Which of the following methods is used for laying of underground cables?
Transmission voltage of ll kV is normally used for distances upto
Transmission voltage of ll kV is normally used for distances upto
When a conductor carries more current on the surface as compared to core, it is due to
When a conductor carries more current on the surface as compared to core, it is due to
Which of the following faults is most likely to occur in cables?
Which of the following faults is most likely to occur in cables?
are the conductors, which connect the consumer's terminals to the distribution
are the conductors, which connect the consumer's terminals to the distribution
The material generally used for armour of high voltage cables is
The material generally used for armour of high voltage cables is
Which of the following relays is used on long transmission lines?
Which of the following relays is used on long transmission lines?
The distributors for residential areas are
The distributors for residential areas are
The wooden poles well impregnated with creosite oil or any preservative compound have life
The wooden poles well impregnated with creosite oil or any preservative compound have life
Which of the following bus-bar schemes has the lowest cost?
Which of the following bus-bar schemes has the lowest cost?
The angular displacement between two interconnected stations is mainly due to
The angular displacement between two interconnected stations is mainly due to
Which of the following is the demerit of a 'constant voltage transmission system'?
Which of the following is the demerit of a 'constant voltage transmission system'?
________ are the conductors, which connect the consumer's terminals to the distribution.
________ are the conductors, which connect the consumer's terminals to the distribution.
There is a greater possibility of occurrence of corona during
There is a greater possibility of occurrence of corona during
By which of the following methods string efficiency can be improved?
By which of the following methods string efficiency can be improved?
A feeder, in a transmission system, feeds power to
A feeder, in a transmission system, feeds power to
The phenomenon of rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the
The phenomenon of rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the
Which of the following materials is used for overhead transmission lines?
Which of the following materials is used for overhead transmission lines?
Constant voltage transmission entails the following disadvantage
Constant voltage transmission entails the following disadvantage
The conductors of the overhead lines are
The conductors of the overhead lines are
The current drawn by the line due to corona losses is
The current drawn by the line due to corona losses is
The frequency of voltage generated, in case of generators, can be increased by
The frequency of voltage generated, in case of generators, can be increased by
The operating voltage of extra high tension cables is upto
The operating voltage of extra high tension cables is upto
The presence of ozone due to corona is harmful because it
The presence of ozone due to corona is harmful because it
In transmission lines the cross-arms are made of
In transmission lines the cross-arms are made of
Which of the following characteristics should the line supports for transmission lines possess?
Which of the following characteristics should the line supports for transmission lines possess?
A conductor, due to sag between two supports, takes the form of
A conductor, due to sag between two supports, takes the form of
A circuit is disconnected by isolators when
A circuit is disconnected by isolators when
Aluminium has a specific gravity of
Aluminium has a specific gravity of
Multi-core cables generally use
Multi-core cables generally use
The cause of damage to the lead sheath of a cable is
The cause of damage to the lead sheath of a cable is
For transmission of power over a distance of 500 km, the transmission voltage should be in the range
For transmission of power over a distance of 500 km, the transmission voltage should be in the range
The corona is considerably affected by which of the following?
The corona is considerably affected by which of the following?
In a substation the following equipment is not installed
In a substation the following equipment is not installed
Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is
Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is
The voltage regulation in magnetic amplifier type voltage regulator is effected by
The voltage regulation in magnetic amplifier type voltage regulator is effected by
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds
The material commonly used for sheaths of underground cables is
The material commonly used for sheaths of underground cables is
The following system is not generally used
The following system is not generally used
Owing to skin effect
Owing to skin effect
In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides
In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides
When an alternator connected to the bus-bar is shut down the bus-bar voltage will
When an alternator connected to the bus-bar is shut down the bus-bar voltage will
Which of the following is usually not the generating voltage?
Which of the following is usually not the generating voltage?
The material commonly used for insulation in high voltage cables is
The material commonly used for insulation in high voltage cables is
The voltage of the single phase supply to residential consumers is
The voltage of the single phase supply to residential consumers is
The voltage drop, for constant voltage transmission is compensated by installing
The voltage drop, for constant voltage transmission is compensated by installing
For transmission of power over a distance of 200 km, the transmission voltage should be
For transmission of power over a distance of 200 km, the transmission voltage should be
In a tap changing transformer, the tapings are provided on
In a tap changing transformer, the tapings are provided on
Which of the following D.C. distribution system is the simplest and lowest in first cost?
Which of the following D.C. distribution system is the simplest and lowest in first cost?
Skin effect is proportional to
Skin effect is proportional to
Which of the following materials is not used for transmission and distribution of electrical power?
Which of the following materials is not used for transmission and distribution of electrical power?
In AC.S.R. Conductors, the insulation between aluminium and steel conductors is
In AC.S.R. Conductors, the insulation between aluminium and steel conductors is
Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
By which of the following systems electric power may be transmitted?
By which of the following systems electric power may be transmitted?
Most of the high voltage transmission lines in India are
Most of the high voltage transmission lines in India are
Distribution lines in India generally use
Distribution lines in India generally use
High voltage transmission lines use
High voltage transmission lines use
Low voltage cables are meant for use up to
Low voltage cables are meant for use up to
Which of the following distribution systems is more reliable?
Which of the following distribution systems is more reliable?
In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
The square root of the ratio of line impedance and shunt admittance is called the
The square root of the ratio of line impedance and shunt admittance is called the
Galvanized steel wire is generally used as
Galvanized steel wire is generally used as
The power factor of industrial loads is generally
The power factor of industrial loads is generally
Large industrial consumers are supplied electrical energy at
Large industrial consumers are supplied electrical energy at
Which of the following are the constants of the transmission lines?
Which of the following are the constants of the transmission lines?
Which of the following is the demerit of a 'constant voltage transmission system' ?
Which of the following is the demerit of a 'constant voltage transmission system' ?
Due to which of the following reasons the cables should not be operated too hot?
Due to which of the following reasons the cables should not be operated too hot?
The skin effect of a conductor will reduce as the
The skin effect of a conductor will reduce as the
A 3-phase 4-wire system is commonly used on
A 3-phase 4-wire system is commonly used on
The operating voltage of high voltage cables is up to
The operating voltage of high voltage cables is up to
Electromechanical voltage regulators are generally used in
Electromechanical voltage regulators are generally used in
In aluminium conductors, steel core is provided to
In aluminium conductors, steel core is provided to
Overhead lines generally use
Overhead lines generally use
For which of the following equipment current rating is not necessary?
For which of the following equipment current rating is not necessary?
Which of the following regulations is considered best?
Which of the following regulations is considered best?
A booster is a
A booster is a
Which of the following is the source of heat generation in the cables?
Which of the following is the source of heat generation in the cables?
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
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
In the analysis of which of the following lines shunt capacitance is neglected?
In the analysis of which of the following lines shunt capacitance is neglected?
The wooden poles well impregnated with creosote oil or any preservative compound has life
The wooden poles well impregnated with creosote oil or any preservative compound has life
When the interconnector between two stations has large reactance
When the interconnector between two stations has large reactance
Series capacitors on transmission lines are of little use when the load VAR requirement is
Series capacitors on transmission lines are of little use when the load VAR requirement is
The spacing between phase conductors of a 220 kV line is approximately equal to
The spacing between phase conductors of a 220 kV line is approximately equal to
For an overhead line, the surge impedance is taken as
For an overhead line, the surge impedance is taken as
On which of the following factors skin effect depends?
On which of the following factors skin effect depends?
For aluminium, as compared to copper, all the following factors have higher values except
For aluminium, as compared to copper, all the following factors have higher values except
By which of the following a bus-bar is rated?
By which of the following a bus-bar is rated?
The underground system cannot be operated above
The underground system cannot be operated above
When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
Pin type insulators are generally not used for voltages beyond
Pin type insulators are generally not used for voltages beyond
