QUIZ TEST


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You have to select only one out of 4


1. Skin effect

Reduces the effective resistance but increases the effective internal reactance.
Increases the effective resistance but reduces the effective internal reactance
Reduces the effective resistance and effective internal reactance
Increases the effective resistance and effective internal reactance

2. Transposition of transmission line is done to

Reduce corona
Balance line voltage drop
Reduced skin effect
Reduce line loss

3. Increase in frequency of transmission line causes

No change in line resistance
Increases in line resistance
Decreases in line resistance
Decreases in line series reactance

4. Transposition of transmission line is done to reduce the

Line losses
Capacitive effect
Disturbance to nearby communication circuits
Effect of surge voltages induced on the line

5. The conductor carries more current on the surface in comparison to its core. This phenomenon is called the

Skin effect
Ferranti effect
Corona
Lenzís effect

6. The presence of earth in case of overhead lines

Increases the capacitance
Increases the inductance
Decreases the capacitance and increases the inductance
Does not effect any of the line constants

7. Skin effect in transmission line is due to

Supply frequency
Self inductance of conductor
High sensitivity of material in the centre
Both (first) and (second)

8. If the effect of earth is taken into account, then the capacitance of line to ground

Decreases
Increases
Remains unaltered
Becomes infinite

9. In a transmission line the distributed constants are

Resistance and shunt conductance only
Resistance and inductance only
Resistance, inductance and capacitance only
Resistance, inductance, capacitance and shunt conductance.

10. The presence of earth in case of overhead lines

Increases the capacitance
Increases the inductance
Decreases the capacitance
Decreases the inductance


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