Electrical Engineering : Power Systems QUESTIONS AND ANSWERS :: part3 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The order of the sub-harmonic during SSR for 50 Hz nornal frequency is |
| 25 Hz |
| 16 2/3 Hz |
| 10 HZ |
| none of the above |
7.Corona losses are minimized when |
| conductors size is reduced |
| smooth conductor is reduced |
| sharp points are provided in the line hardware |
| current density in conductors is reduced |
8.The non-uniform distribution of voltage across the units in a string of suspention type insulators is due to |
| unequal self-capacitance of the units |
| non-uniform distance of separation of the units from the tower body |
| the existence of stray capacitance between the metallic junctions of the units and the tower body |
| non-uniform distance between the cross-arm and the units |
9.For a long uncompensatedline the limit to the line loading ill governed by |
| thermal limit |
| voltage drop |
| stability limit |
| corona loss |
10.The time taken for a surge to travel a 600 km long overhead transmission line is |
| 6s |
| 1s |
| 0.02s |
| 0.002s |
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