Transmission & Distribution The wooden poles well impregnated with creosote oil or any preservative compound has life 10 to 15 years 60 to 70 years 25 to 30 years From 2 to 5 years 10 to 15 years 60 to 70 years 25 to 30 years From 2 to 5 years ANSWER DOWNLOAD EXAMIANS APP
Transmission & Distribution In a balanced 3 wire dc system, the voltage across the outers is 500V. The voltage between any outer and neutral wire is 100 V 500 V 250 V 125 V 100 V 500 V 250 V 125 V ANSWER DOWNLOAD EXAMIANS APP
Transmission & Distribution 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 Kelvin's law Ohm's law Faraday's law Kirchhoff's law Kelvin's law Ohm's law Faraday's law Kirchhoff's law ANSWER DOWNLOAD EXAMIANS APP
Transmission & Distribution The angular displacement between two interconnected stations is mainly due to Armature reactance of both alternators Synchronous reactance of both the alternators All of these Reactance of the interconnector Armature reactance of both alternators Synchronous reactance of both the alternators All of these Reactance of the interconnector ANSWER DOWNLOAD EXAMIANS APP
Transmission & Distribution Basically the boosters are Capacitors Transformers Inductors Synchronous motors Capacitors Transformers Inductors Synchronous motors ANSWER DOWNLOAD EXAMIANS APP
Transmission & Distribution As a rough guide, the most economical transmission voltage is _____of the length of the line. 3 kV/km 2kV/km 3.2kV/km 1.6 kV/km 3 kV/km 2kV/km 3.2kV/km 1.6 kV/km ANSWER DOWNLOAD EXAMIANS APP
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