Power Systems Questions and Answers – Capacitance of a Two-Wire Line

This set of Power Systems Multiple Choice Questions & Answers (MCQs) focuses on “Capacitance of a Two-Wire Line”

1. The presence of ozone while the corona has occurred, can be found using ________
a) pressure
b) hissing noises
c) faint luminous glow of bluish colour
d) all of the mentioned
View Answer

Answer: d
Explanation: The ozone can be easily detected by all the mentioned effects occurring in the system.

2. The corona has only disadvantages to the transmission system.
a) True
b) False
View Answer

Answer: b
Explanation: Corona is helpful while the surges are there.

3. The very peculiar advantage of corona in the circuit can be ___________
a) reduction in steepness of surge fronts
b) improvement of power factor
c) reduction in radio interference
d) reduction in steepness, radio interference and improvement of PF
View Answer

Answer: a
Explanation: Corona reduces the surge occurring in the system.

4. When the ozone gas is produced as a by product of corona, that causes _______
a) corrosion of wires
b) reduction of power factor
c) increase of power factor
d) improvement of regulation
View Answer

Answer: a
Explanation: Ozone gas corrodes the metals.

5. Critical voltage limit of the transmission line can be increased by ____________
a) increasing conductor’s radius
b) increasing conductor spacing
c) reducing conductor spacing
d) reducing radius of conductor
View Answer

Answer: a
Explanation: Vα 1/r.

6. In a transmission system, the transmission parameters of distribution is/are ___________
a) resistance
b) inductance
c) capacitance and shunt conductance
d) resistance, inductance, capacitance and shunt conductance
View Answer

Answer: d
Explanation: R, L, C, G are the distribution constants.

7. Following effects of the transmission lines
(i) Skin effect
(ii) Corona
(iii) Proximity
The effective resistance of the conductor is increased by __________
a) (i), (ii)
b) (i), (iii)
c) (ii), (iii)
d) (i), (ii), (iii)
View Answer

Answer: d
Explanation: Effective resistance increases by skin effect, corona as well as proximity effect.

8. _______ is neglected while carrying out short transmission line analysis.
a) Shunt admittance
b) Power losses
c) Series impedance
d) None of the mentioned
View Answer

Answer: a
Explanation: Shunt admittance is neglected.

9. We transpose high voltages especially while transmitting so that the __________
a) phase voltage imbalances can be minimised
b) corona losses are reduced
c) voltage drop is minimised
d) all of the mentioned
View Answer

Answer: a
Explanation: Transposition reduces the phase voltage imbalances by cancelling their effects.

10. While modelling a short transmission line of the overhead lines, line resistance and inductances are only considered because the line capacitance is ___________
a) zero
b) finite but small
c) finite but large
d) infinite
View Answer

Answer: b
Explanation: Capacitance for such a distance is small and negligible.

Sanfoundry Global Education & Learning Series – Power Systems.

To practice all areas of Power Systems, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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