Power system-31-01-25

Power system-31-01-25

University

10 Qs

quiz-placeholder

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Power system-31-01-25

Power system-31-01-25

Assessment

Quiz

Engineering

University

Medium

Created by

Dr. 299

Used 20+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A feeder in an electrical distribution system is designed to:

Transmit power from a substation to the distribution transformers

Step up the voltage

Deliver power to individual consumers

Control the voltage regulation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The main advantage of using a ring main distribution system is:

Increased reliability

Lower cost

Simplified design

Higher power loss

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For a 100 km long transmission line, D.C. transmission is preferred over A.C. transmission because:

It has no reactive power losses

It is more economical for short distances

It requires no insulation

It has better voltage regulation

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an A.C. power transmission system, the skin effect:

Causes the current to flow on the surface of the conductor

Increases the power factor

Reduces power losses

Occurs only in underground cables

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The most economical voltage for transmitting power over 1000 km is:

±500 kV DC

765 kV AC

33 kV AC

132 kV AC

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For a leading power factor load, the voltage regulation of a transmission line is:

Always positive.

Zero.

Negative.

Cannot be determined.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A copper conductor has a resistance of 0.15 Ω/km. Calculate the total resistance of a 20 km long conductor.

3 Ω

2 Ω

4 Ω

1.5 Ω

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