power quality

is the short time reduction in the rms voltage between 0.1 to 0.9 p.u for a duration of 0.5 cycle to 1 minute:

• Voltage sag

• Voltage surge

• Voltage Interruption

• Voltage degradation

Harmonics cause which of the following:

• Heating in windings

• Capacitor Failure

• All the Options are Correct

• Nuisance Tripping

Which one of the following is waveform distortion:

• DC offset

• All the options are correct

• Notching

• Electrical noise

Which of the following is long-term (hours-long) voltage sags caused by system overload

• Brown out

• Black out

• Voltage dip

• Voltage surge

Harmonics present in the system will cause interference with neighboring Telephone Lines

• True

• False

Which of the following is not a source of harmonic current

• Capacitor Switching

• UPS Systems

• Computers

• Resistive Load

Filters are used to reduce which of the following

• Voltage distortion

• Harmonics

• Voltage sag

• All the options are correct

Most of the power quality problems are related to grounding and neutral size issues

• TRUE

• FALSE

Which one of the following device is used for improving the power factor of the system

• Shunt Reactor

• Asynchronous Generator

• Series Reactor

• Synchronous Phase Modifier

Electric resistance heaters and incandescent bulbs have power factor of which of the following:

• Zero

• Leading

• Lagging

• Unity