# Electric Power Transmission and Distribution MCQ Part 2

Electrical Engineering MCQ Questions on Power Transmission and distribution. PT&D Part 2 MCQ Questions.

## Transmission lines are responsible to connect

Transmission lines are responsible to connect

1. Substation to the distribution station
2. Distribution station to consumer premises
3. Distributer to feeder
4. Feeder to service mains

Correct answer: 1. Substation to distribution station

## Power Engineers design the feeders from the point of view of

Power Engineers design the feeders from the point of view of:

1. Voltage Drop
2. Current Carrying Capacity
3. Operating Voltage
4. Operating Frequency

Correct answer: 2. Current carrying capacity

In electric power system a feeder is a conductor which connects the sub-station or localized power station to the area where power is distributed. Usually there are no tapings taken from the feeder so that current is unique throughout. So the main consideration for design engineers is the current carrying capacity of feeder.

## Power Engineers design distributors from the point of view of:

1. Voltage Drop
2. Current Carrying Capacity
3. Operating Voltage
4. Operating Frequency

Correct answer: Voltage drop

Explanation:

In an electric power system, a distributor is a conductor from which the tappings are taken for supply to the consumers. In a distributor, the current passing through is not constant because of the tappings taken at various places along its length. So the main consideration for design engineers while designing a distributor is the voltage drop along its length.
Good to know: The limit of voltage variations at consumer terminals is ± 6% of the rated value

## The major reason for using bundled conductors in transmission lines is

The major reason for using bundled conductors in transmission lines is:

1. To increase mechanical strength
2. To reduced corona
3. Reduce losses
4. Improve sag profile

Correct answer: 2. To reduce corona

## Number of discs in a string of suspension insulators for a 400 kV transmission lines is

The number of discs in string of suspension insulators for a 400 kV transmission lines is:

1. 5 – 6
2. 10 – 12
3. 18 – 23
4. 35 – 40

Correct answer: 3. 18 – 23

18-23 doesn’t reflect any standard and should be considered only as an estimated value for theoretical purposes

1. Electric Power Transmission and Distribution MCQ Part 1