# Electrical Power Transmission MCQs Part 14

Electrical Power Transmission MCQs Part 14

## Suspension type insulators are employed for voltages beyond

Suspension type insulators are employed for voltages beyond:

1. 230 V
2. 11 kV
3. 13 kV
4. 33 kV

Find explanation here

## If span is increased, the sag

If span is increased, the sag:

1. Increases
2. Decreases
3. Is not being affected
4. None of above

## If string efficiency is increased, voltage across disc nearest to conductor

If string efficiency is increased, voltage across disc nearest to conductor:

1. Increases
2. Decreases
3. Remains unchanged
4. None of these

## A string efficiency of 100% implies that

A string efficiency of 100% implies that:

1. Shunt capacitance is maximum
2. Shunt capacitance is zero
3. Self-capacitance is maximum
4. Self-capacitance is zero

Correct answer: 2. Shunt capacitance is zero Explanation: If shunt capacitance is zero, this indicates that charging current through each disc will be the same. This means that voltage across each disc is the same. This inturn implies 100% string efficiency.

## With an increase in length of transmission lines, the resistance of line

With an increase in length of transmission lines, the resistance of line:

1. Increases
2. Decreases
3. Remains unchanged
4. None of these