By which of the following methods string efficiency can be improved? Mark as favorite Copy Link Using a guard ring Grading the insulator Using long cross arm Any of the above Check Answer
The cause of damage to the lead sheath of a cable is? Mark as favorite Copy Link crystallisation of the lead through vibration chemical action on the lead when buried in the earth mechanical damage all of the above Check Answer
The square root of the ratio of line impedance and shunt admittance is called the? Mark as favorite Copy Link surge impedance of the line conductance of the line regulation of the line none of the above Check Answer
Which of the following is usually not the generating voltage? Mark as favorite Copy Link 6.6 kV 8.8 kV 11 KV 13.2 KV Check Answer
Which of the following is the source of heat generation in the cables? Mark as favorite Copy Link Dielectric losses in cable insulation I2R losses in the conductor Losses in the metallic sheathings and armourings All of the above Check Answer
Which of the following characteristics should the line supports for transmission lines possess? Mark as favorite Copy Link Low cost High mechanical strength Longer life All of the above Check Answer
By which of the following methods string efficiency can be improved? Mark as favorite Copy Link Using a guard ring Grading the insulator Using long cross arm Any of the above Check Answer
Constant voltage transmission entails the following disadvantage? Mark as favorite Copy Link large conductor area is required for same power transmission short-circuit current of the system is increased either of the above none of the above Check Answer
If the voltage is increased x times, the size of the conductor would be? Mark as favorite Copy Link reduced to 1/x2 times reduced to 1/x times increased x times increased to x2 times Check Answer
Corona usually occurs when the electrostatic stress in air around the conductor exceeds? Mark as favorite Copy Link 6ยท6 kV (r.m.s. value)/cm 11 kV (r.m.s. value)/cm 22 kV (maximum value)/cm 30 kV (maximum value)/cm Check Answer