5) What is the reason for the conductor cross- sectional area can fully utilised on transmission of DC as compared to AC?

Answer is:

No skin effect

Transmission and Distribution MCQ with Answers

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6) Why the disc pin insulators outer surface is made by glazing and bent the sides inward?

Answer is:

Disables continuous water flow in rainy season

7) Why steel is reinforced in ACSR conductors used for overhead lines?

Answer is:

To increase the tensile strength

Explanation:

Aluminium conductor steel-reinforced cable (ACSR) is a type of high-capacity, high-strength stranded conductor typically used in overhead power lines. The outer strands are high-purity aluminium, chosen for its good conductivity, low weight, low cost, resistance to corrosion and decent mechanical stress resistance.