The String Efficiency of DC Systems is | Power Transmission and Distribution MCQ#55

The string efficiency of dc power systems is:

  1. 25%
  2. 50%
  3. 75%
  4. 100%

Correct answer: 4. 100%

Why String Efficiency of DC Systems is 100% – MCQ Explanation

String efficiency is defined as the ratio of voltage across the whole insulators string to the product of the total number of discs and the voltage across the disc that is located in closest proximity to the conductor is known as string efficiency.

In the case of Alternating current, the voltage applied across the string insulators is not uniformly distributed.

In the case of direct current (DC), the insulator’s capacitances are ineffective and the voltage across each unit of insulators is the same. Due to which the string efficiency of DC systems in 100%

More MCQ on Power Transmission and Distribution:

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  2. Sag of transmission lines in winter is
  3. Sag of transmission lines is least affected by
  4. Sag in transmission lines depends on which factor
  5. Secondary distribution of AC is done by
  6. Series capacitors on transmission lines are little to none handy when
  7. Stringing chart is plotted between
  8. Stranded conductor has corona as compared to solid conductor [More/Less/Same]
  9. The 2nd layer of stranded conductor has total number of individual wires
  10. The correct statement about copper
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