High Voltage Engineering Questions and Answers – Generation of Switching Surges

This set of High Voltage Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Generation of Switching Surges”.

1. A switching surge is a _________ duration _________ voltage produced in the system due to sudden opening and closing of switches.
a) short, transient
b) long, transient
c) short, impulse
d) long, impulse

Explanation: A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature. The waveform of switching surge is not unique.

2. The transient voltage may be _________
a) an oscillatory wave
b) a damped oscillatory wave
c) critically damped wave
d) an oscillatory wave or a damped oscillatory wave

Explanation: The transient voltage may be an oscillatory wave or a damped oscillatory wave. The frequency of the waves ranges from a few hundred hertz to few kilo hertz. Transient voltage can also be considered as a slow rising impulse.

3. The waveform of switching surge is unique.
a) True
b) False

Explanation: The waveform of switching surge is not unique. A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature.

4. Surge voltage can be considered as a slow rising impulse with a front time of _________
a) 200-500 ms
b) 100-200 ms
c) 10-100 ms
d) 0.1-10 ms

Explanation: A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature. Surge voltage can be considered as a slow rising impulse with a front time of 0.1-10 ms.

5. Surge voltage can be considered as a slow rising impulse with a tail time of _________
a) 200-500 ms
b) 1-several ms
c) 10-10 ns
d) 0.1-10 ns

Explanation: A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature. Surge voltage can be considered as a slow rising impulse with a front time of 1-several ms.

6. Transmission lines rated for 220kV and above incorporate switching surge spark over voltage.
a) True
b) False

Explanation: Switching sure spark over voltage is incorporated by the transmission lines rated for 220kV and above. This voltage plays a vital role in the design of insulation.

7. Tesla coil can produce _________
a) rectangular voltage
b) impulse voltage
c) switching surges
d) oscillatory

Explanation: Several methods are adopted to produce switching surges. Tesla coil is a circuit that can produce switching surges. A switching surge is a voltage produced in the system due to the sudden opening and closing of switches.

8. What is the tail time of switching impulse voltage according to Indian Standards?
a) 50 μs
b) 250 μs
c) 2500 μs
d) 50 μs

Explanation: A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature. The waveform of switching surge is not unique. The front time of switching impulse voltage according to Indian Standards is 25 00μs.

9. What is the front time of switching impulse voltage according to Indian Standards?
a) 5 μs
b) 250 μs
c) 25 μs
d) 50 μs

Explanation: A switching surge is a voltage produced in the system due to the sudden opening and closing of switches. It is of short duration and is transient in nature. The waveform of switching surge is not unique. The front time of switching impulse voltage according to Indian Standards is 250 μs.

10. The damped oscillations have a frequency of about _________
a) 5-15KHz
b) 10-20KHz
c) 1-10KHz
d) 20-22KHz

Explanation: The damped oscillations have a frequency of about 1-10KHz. The transient voltage may be an oscillatory wave or a damped oscillatory wave. The frequency of the waves ranges from a few hundred hertz to few kilohertz.

Sanfoundry Global Education & Learning Series – High Voltage Engineering.

To practice all areas of High Voltage Engineering, here is complete set of Multiple Choice Questions and Answers.

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