Question 1

The wooden poles well impregnated with creosite oil or any preservative compound have life

Accepted Answer

A) from 2 to 5 years 
B) 10 to 15 years 
C) 25 to 30 years 
D) 60 to 70 years 
A) from 2 to 5 years 
B) 10 to 15 years 
C) 25 to 30 years 
D) 60 to 70 years C

Question 2

The operating voltage of high voltage cables is upto

Accepted Answer

A) l.lkV 
B) 3.3kV 
C) 6.6kV 
D) llkV 
A) l.lkV 
B) 3.3kV 
C) 6.6kV 
D) llkV D

Question 3

The underground system cannot be operated above

Accepted Answer

A) 440 V 
B) 11 kV 
C) 33 kV 
D) 66 kV 
A) 440 V 
B) 11 kV 
C) 33 kV 
D) 66 kV D

Question 4

The operating voltage of extra high tension cables is upto

Accepted Answer

A) 6.6 kV 
B) 11 kV 
C) 33 kV 
D) 66 kV 
A) 6.6 kV 
B) 11 kV 
C) 33 kV 
D) 66 kV

Question 5

A booster is a

Accepted Answer

A) series wound generator 
B) shunt wound generator 
C) synchronous generator 
D) none of the above 
A) series wound generator 
B) shunt wound generator 
C) synchronous generator 
D) none of the above

Question 6

The operating voltage of supertension cables is upto

Accepted Answer

A) 3.3 kV 
B) 6.6 kV 
C) 11 kV 
D) 33 kV 
A) 3.3 kV 
B) 6.6 kV 
C) 11 kV 
D) 33 kV

Question 7

Overhead system can be designed for operation upto

Accepted Answer

A) 11 kV 
B) 33 kV 
C) 66 kV 
D) 400 kV 
A) 11 kV 
B) 33 kV 
C) 66 kV 
D) 400 kV

Question 8

Which of the following is the demerit of a 'constant voltage transmission system' ?

Accepted Answer

A) Increase of short-circuit current of the system 
B) Availability of steady voltage at all loads at the line terminals 
C) Possibility of better protection for the line due to possible use of higher terminal reactances 
D) Improvement of power factor at times of moderate and heavy loads 
A) Increase of short-circuit current of the system 
B) Availability of steady voltage at all loads at the line terminals 
C) Possibility of better protection for the line due to possible use of higher terminal reactances 
D) Improvement of power factor at times of moderate and heavy loads

Question 9

Which of the following materials is not used for transmission and distribution of electrical power ?

Accepted Answer

A) Copper 
B) Aluminium 
C) Steel 
D) Tungsten 
A) Copper 
B) Aluminium 
C) Steel 
D) Tungsten

Question 10

The square root of the ratio of line impedance and shunt admittance is called the

Accepted Answer

A) surge impedance of the line 
B) conductance of the line 
C) regulation of the line 
D) none of the above 
A) surge impedance of the line 
B) conductance of the line 
C) regulation of the line 
D) none of the above

Question 11

310 km line is considered as

Accepted Answer

A) a long line 
B) a medium line 
C) a short line 
D) any of the above 
A) a long line 
B) a medium line 
C) a short line 
D) any of the above

Question 12

Which of the following are the constants of the transmission lines ?

Accepted Answer

A) Resistance 
B) Inductance 
C) Capacitance 
D) All of the above 
A) Resistance 
B) Inductance 
C) Capacitance 
D) All of the above

Question 13

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

Accepted Answer

A) Kelvin's law 
B) Ohm's law 
C) Kirchhoffs law 
D) Faraday's law 
A) Kelvin's law 
B) Ohm's law 
C) Kirchhoffs law 
D) Faraday's law

Question 14

Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?

Accepted Answer

A) Circulating current method 
B) Thevenin's theorem 
C) Superposition of currents 
D) All of the above 
A) Circulating current method 
B) Thevenin's theorem 
C) Superposition of currents 
D) All of the above

Question 15

The cause of damage to the lead sheath of a cable is

Accepted Answer

A) crystallisation of the lead through vibration 
B) chemical action on the lead when buried in the earth 
C) mechanical damage 
D) all of the above 
A) crystallisation of the lead through vibration 
B) chemical action on the lead when buried in the earth 
C) mechanical damage 
D) all of the above

Question 16

Due to which of the following reasons the cables should not be operated too hot ?

Accepted Answer

A) The oil may loose its viscosity and it may start drawing off from higher levels 
B) Expansion of the oil may cause the sheath to burst 
C) Unequal expansion may create voids in the insulation which will lead to ionization 
D) All of the above 
A) The oil may loose its viscosity and it may start drawing off from higher levels 
B) Expansion of the oil may cause the sheath to burst 
C) Unequal expansion may create voids in the insulation which will lead to ionization 
D) All of the above

Question 17

Which of the following D.C. distribution system is the simplest and lowest in first cost?

Accepted Answer

A) Radial system 
B) Ring system 
C) Inter-connected system 
D) None of the above 
A) Radial system 
B) Ring system 
C) Inter-connected system 
D) None of the above

Question 18

Galvanised steel wire is generally used as

Accepted Answer

A) stay wire 
B) earth wire 
C) structural components 
D) all of the above 
A) stay wire 
B) earth wire 
C) structural components 
D) all of the above

Question 19

Which of the following faults is most likely to occur in cables ?

Accepted Answer

A) Cross or short-circuit fault 
B) Open circuit fault 
C) Breakdown of cable insulation 
D) All of the above 
A) Cross or short-circuit fault 
B) Open circuit fault 
C) Breakdown of cable insulation 
D) All of the above

Question 20

Low voltage cables are meant for use up to

Accepted Answer

A) l.lkV 
B) 3.3kV 
C) 6.6kV 
D) llkV 
A) l.lkV 
B) 3.3kV 
C) 6.6kV 
D) llkV

The wooden poles well impregnated with creosite oil or any preservative compound have life

The operating voltage of high voltage cables is upto

The underground system cannot be operated above

The operating voltage of extra high tension cables is upto

A booster is a

The operating voltage of supertension cables is upto

Overhead system can be designed for operation upto

Which of the following is the demerit of a 'constant voltage transmission system' ?

Which of the following materials is not used for transmission and distribution of electrical power ?

The square root of the ratio of line impedance and shunt admittance is called the

310 km line is considered as

Which of the following are the constants of the transmission lines ?

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

Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?

The cause of damage to the lead sheath of a cable is

Due to which of the following reasons the cables should not be operated too hot ?

Which of the following D.C. distribution system is the simplest and lowest in first cost?

Galvanised steel wire is generally used as

Which of the following faults is most likely to occur in cables ?

Low voltage cables are meant for use up to

Electrical Supply and Distribution

Transmission System and Equipment

Electrical Transmission and Insulation

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Exam 1: Electrical Power Transmission and Distribution

The wooden poles well impregnated with creosite oil or any preservative compound have life

The operating voltage of high voltage cables is upto

The underground system cannot be operated above

The operating voltage of extra high tension cables is upto

A booster is a

The operating voltage of supertension cables is upto

Overhead system can be designed for operation upto

Which of the following is the demerit of a 'constant voltage transmission system' ?

Which of the following materials is not used for transmission and distribution of electrical power ?

The square root of the ratio of line impedance and shunt admittance is called the

310 km line is considered as

Which of the following are the constants of the transmission lines ?

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

Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?

The cause of damage to the lead sheath of a cable is

Due to which of the following reasons the cables should not be operated too hot ?

Which of the following D.C. distribution system is the simplest and lowest in first cost?

Galvanised steel wire is generally used as

Which of the following faults is most likely to occur in cables ?

Low voltage cables are meant for use up to

Electrical Supply and Distribution

Transmission System and Equipment

Electrical Transmission and Insulation

Filters