Corona Loss | Transmission And Distribution Objective Type Questions and answers

41.  Only advantage of corona is that it

   A. Produces a pleasing luminous glow

   B. Makes line current sinusoidal

   C. Works as a safety valve for surges

   D. Ozone gas is produced

42.  The chances of occurrence of corona are maximum during

   A. Humid weather

   B. Dry weather

   C. Winter

   D. Hot summer

43.  The charging current in a transmission line increases due to corona effect because corona increases

   A. Line current

   B. effective line voltage

   C. Power loss in lines

   D. Effective conductor diameter

44.  The effect of corona is

   A. Increased energy loss

   B. Increased reactance

   C. Increased inductance

   D. All of the above

45.  Corona losses are minimised when

   A. Conductor size is reduced

   B. Smooth conductor is used

   C. Sharp points are provided in the line hardware

   D. Current density in conductor is reduced

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