In a cable the voltage stress is maximum at____________?
In a cable the voltage stress is maximum at____________? A. sheath B. insulator E. surface of the conductorD. core of the conductor
In a cable the voltage stress is maximum at____________? A. sheath B. insulator E. surface of the conductorD. core of the conductor
The insulation of the cable decreases with__________? A. the increase in length of the insulation B. the decrease in the length of the insulation C. either A. or (b) D. none of the above
Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________? A. Polyvinyle chloride B. Vulcanised rubber C. Impregnated paperD. Compressed SFe gas E. none of the above
The advantage of cables over overhead transmission lines is___________? A. easy maintenance B. low costC. can be used in congested areas D. can be used in high voltage circuits
Capacitance grading of cable implies__________? A. use of dielectrics of different permeabilities B. grading according to capacitance of cables per km length C. cables using single dielectric in different concentrations D. capacitance required to be introduced at different lengths to…
A cable carrying alternating current has__________? A. hysteresis losses onlyB. hysteresis and leakage losses only C. hysteresis, leakage and copper losses only D. hysteresis, leakage, copper and friction losses
The electrostatic stress in underground cables is_________? A. same at the conductor and the sheath B. minimum at the conductor and maximum at the sheathC. maximum at the conductor and minimum at the sheath D. zero at the conductor as…
Underground cables are laid at sufficient depth___________? A. to minimise temperature stresses B. to avoid being unearthed easily due to removal of soilC. to minimize the effect of shocks and vibrations due to gassing vehicles, etc D. for all of…
The thickness of metallic shielding on cables is usually_______________? A. 0.04 mm B. 0.2 to 0.4 mm E. 3 to 5 mm D. 40 to 60 mm
The breakdown voltage of a cable depends on_____________? A. presence of moisture B. working temperature C. time of application of the voltageD. all of the above