Q13. Which of the following is the main disadvantage of using con (a) Poor performance at high frequencies (b) Poor performance at low frequencies (c) Poor performance at mid-range (d) Poor performance at all frequencies (e) None of the above Q14. Which of the following methods provide the best performance frequency range? (a) Constant V/f (b) Flux vector control (c) Flux vector control with speed sensor (d) Constant voltage (e) Pulse width modulation Q15. Harmonics are generated by: (a) The main utility generators (b) Small standby generators (c) Resistive, capacitive and inductive loads (d) Electronic loads (e) All of the above Q16. Name a method to eliminate the harmonics from an electric ci (a) Increasing the size of grounding conductors (b) Increasing the system voltage (c) Using special tuned filters (d) Adding capacitors in parallel to a load (e) All of the above Q17. A distorted, periodic waveform can be decomposed into fu series of harmonic waves. This statement is based on which th (a) Laplace (b) Fourier (c) Thevenin (d) Superposition (e) Maximum power

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Q13. Which of the following is the main disadvantage of using constant V/f ratio in VFDs?
(a) Poor performance at high frequencies
(b) Poor performance at low frequencies
(c) Poor performance at mid-range
(d) Poor performance at all frequencies
(e) None of the above
Q14. Which of the following methods provide the best performance over the entire VFD
frequency range?
(a) Constant V/f
(b) Flux vector control
(c) Flux vector control with speed sensor
(d) Constant voltage
(e) Pulse width modulation
Q15. Harmonics are generated by:
(a) The main utility generators
(b) Small standby generators
(c) Resistive, capacitive and inductive loads
(d) Electronic loads
(e) All of the above
Q16. Name a method to eliminate the harmonics from an electric circuit
(a) Increasing the size of grounding conductors
(b) Increasing the system voltage
(c) Using special tuned filters
(d) Adding capacitors in parallel to a load
(e) All of the above
Q17. A distorted, periodic waveform can be decomposed into fundamental sine wave and a
series of harmonic waves. This statement is based on which theorem
(a) Laplace
(b) Fourier
(c) Thevenin
(d) Superposition
(e) Maximum power
Transcribed Image Text:Q13. Which of the following is the main disadvantage of using constant V/f ratio in VFDs? (a) Poor performance at high frequencies (b) Poor performance at low frequencies (c) Poor performance at mid-range (d) Poor performance at all frequencies (e) None of the above Q14. Which of the following methods provide the best performance over the entire VFD frequency range? (a) Constant V/f (b) Flux vector control (c) Flux vector control with speed sensor (d) Constant voltage (e) Pulse width modulation Q15. Harmonics are generated by: (a) The main utility generators (b) Small standby generators (c) Resistive, capacitive and inductive loads (d) Electronic loads (e) All of the above Q16. Name a method to eliminate the harmonics from an electric circuit (a) Increasing the size of grounding conductors (b) Increasing the system voltage (c) Using special tuned filters (d) Adding capacitors in parallel to a load (e) All of the above Q17. A distorted, periodic waveform can be decomposed into fundamental sine wave and a series of harmonic waves. This statement is based on which theorem (a) Laplace (b) Fourier (c) Thevenin (d) Superposition (e) Maximum power
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