If you think you have a good understanding of Importance of Power Quality in Power Systems, challenge yourself and take our quiz.
Best of Luck.!!
Question 1 of 19
Power quality is the ability of system to
Supply power efficiently
Consume the power supplied to it
Both (a) and (b)
None of the above
Question 2 of 19
In technical terms, power system is the measure, study, and enhancement of sinusoidal wave form at the rated
Current and voltage
Power and voltage
Voltage and frequency
Question 3 of 19
The cause of poor power quality in transmission line is:
Wind
Voltage fluctuation
Lightning
All of the above
Question 4 of 19
In distribution system, power quality is disturbed due to:
Voltage dips
Transformer energization
Question 5 of 19
Non-linear loads produces
Sinusoidal current
Non sinusoidal current
DC current
Question 6 of 19
Transients are the pulses occurring in a sinusoidal waveform for a _______ but of _______:
Long duration, low intensity
Long duration, high intensity
Small duration, high intensity
Small duration, low intensity
Question 7 of 19
Voltage variation can be caused due to:
Equipment failure
Control malfunction
Inrush current
Question 8 of 19
Unbalanced voltage means, voltage of 3 phase systems:
Unequal magnitude
Unequal phase difference
Unequal magnitude or phase difference
Question 9 of 19
Which value of power factor shows a high power quality?
zero
0.5
0.7
0.9
Question 10 of 19
Flickers can be caused due to:
Load changes
Motor drives
Welding machines
Question 11 of 19
From the following types given below, ____ is not a type of distorted wave form
DC offset
Electric noise
Harmonics
Question 12 of 19
Poor power quality can cause:
Equipment damage
Cost effect
Poor efficiency
Question 13 of 19
Which power quality standard is defined for electric power distribution for industrial plants?
IEEE 242-1986
IEEE 141-1993
IEEE 1159-1995
IEEE 519-1992
Question 14 of 19
Which standard is defined for transient on low voltage power and signal line?
IEC 816-1984
IEC 868-0-1991
Question 15 of 19
To suppress harmonics from system, which device is used:
Surge protective device
Filter
Regulators
Oscillators
Question 16 of 19
To protect system from voltage spikes, which device is used:
Question 17 of 19
To protect the system from varying voltages, which device is used:
Voltage regulators
UPS
Question 18 of 19
Power quality monitoring helps in:
Power quality control
Energy management
Improve system’s performance
Question 19 of 19
For power quality monitoring, which equipment are used?
Fault recorder and relay
Power transformer
Filters