Electrical Power Transmission MCQs Part 6

1. Cross arms are installed over the transmission lines to:

1. Improve visual look
2. Support insulators
3. Reduce radio interference
4. Increase shunt capacitance

Correct answer: 2. Support insulators

2. In case of a strike, it is desirable that insulator should fail by:

1. Puncture
2. Flash-over
3. Both of above

Correct answer: 2. Flash-over

3. The effect which is ignored in small transmission lines:

1. Resistive
2. Inductive
3. Capacitive
4. 2 & 3
5. None of above

Correct answer: 3. Capacitive

4. Logic: Application of lumped constants to long transmission lines is impractical.

Solution: Line constants are considered to be uniformly distributed across long lines.

1. Presented logic is wrong and the solution is not required
2. Logic is correct, but the solution is also impractical
3. The logic presents the problem which is solved by applying the solution
4. Logic and solution don’t match the scenario

Correct answer: 3. The logic presents the problem which is solved by applying the solution

5. Capacitance in transmission lines form part:

1. Series
2. Shunt
3. Any of above
4. None of above

Correct answer: 2. Shunt

6. Inductance in transmission lines form part:

1. Series
2. Shunt
3. Any of above
4. None of above

Correct answer: 2. Series

7. The fault which occurs on underground systems:

1. Open-circuit fault
2. Short-circuit fault
3. Earth fault
4. Any of above

Correct answer: 4. Any of above

8. The term ACSR represents:

1. Aluminum conductor steel reinforced
2. Arsenic conductor solid rounded
3. Anode conduction of solid round conductors
4. None of above

Correct answer: 1. Aluminum conductor steel reinforced

9. The initial cost of the underground system is _________ overhead system:

1. More than
2. Less than
3. Equal to

Correct answer: 2. More than

10. Advantages of DC transmission system:

1. No inductance is present
2. No skin effect
3. Reduced corona loss
4. All of these
5. None of these

Correct answer: 4. All of these

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