Multicore cables generally use? Mark as favorite Copy Link square conductors circular conductors rectangular conductors sector-shaped conductors 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 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 Check Answer
Which of the following materials is used for overhead transmission lines? Mark as favorite Copy Link Steel cored aluminium Galvanised steel Cadmium copper Any of the above Check Answer
Which of the following methods is used for laying of underground cables? Mark as favorite Copy Link Direct laying Draw-in-system Solid system All of the above Check Answer
Due to which of the following reasons the cables should not be operated too hot? Mark as favorite Copy Link The oil may loose its viscosity and it may start drawing off from higher levels Expansion of the oil may cause the sheath to burst Unequal expansion may create voids in the insulation which will lead to ionization All of the above Check Answer
Which of the following faults is most likely to occur in cables? Mark as favorite Copy Link Cross or short-circuit fault Open circuit fault Breakdown of cable insulation All of the above Check Answer
The operating voltage of supertension cables is upto? Mark as favorite Copy Link 3.3 kV 6.6 kV 11 kV 33 kV Check Answer
Owing to skin effect? Mark as favorite Copy Link current flows through the half cross-section of the conductor portion of the conductor near the surface carries more current and core of the conductor carries less current portion of the conductor near the surface carries less current and core of the conductor carries more current any of the above Check Answer