Top 80+ Solved Power Quality and Management MCQ Questions Answer
Q. Reducing the number of short-circuit faults in a system, reduces ______
a. Sag
b. Interruptions
c. Sag & Interruptions
d. none of the above
Q. Current-limiting fuses are able to clear a fault within one _______.
a. Half cycle
b. full cycle
c. will not clear
d. none of the above
Q. By implementing changes in the supply system, the severity of the event will__.
a. Reduce
b. Increase
c. Remains the same
d. None of the above
Q. The main mitigation equipments is___
a. UPS
b. Storage device
c. voltage source converter
d. All the above
Q. During normal operation, the UPS takes its power from the supply, rectifies the acvoltage to dc and inverts it again to ac with the
a. same frequency and rms value
b. Different frequency and rms value
c. same frequency and different rms value
d. Different frequency and same rms value
Q. What is the value of transient stability limit?
a. Higher than steady state stability limit
b. Lower than steady state stability limit.
c. Depending upon the severity of load
d. All of these
Q. By using which component can the transient stability limit of a power system be improved?
a. Series resistance
b. Series capacitor
c. Series inductor
d. Shunt resistance
Q. What is transient stability limit?
a. The maximum flow of power through a particular point in the power system without loss of stability when small disturbances occur.
b. The maximum power flow possible through a particular component connected in the power system.
c. The maximum flow of power through a particular point in the power system without loss of stability when large and sudden disturbances occur
d. All of these
Q. Which among the following methods is used for improving the system stability?
a. Increasing the system voltage
b. Reducing the transfer reactance
c. Using high speed circuit breaker
d. All of these
Q. What is steady state stability limit?
a. The maximum flow of power through a particular point in the power system without loss of stability when small disturbances occur.
b. The maximum power flow possible through a particular component connected in the power system.
c. The maximum flow of power through a particular point in the power system without loss of stability when sudden disturbances occur
d. All of these
Q. Which among these is a classification of power system stability?
a. Frequency stability
b. Voltage stability
c. Rotor angle stability
d. All of these
Q. The stability of the power system is not affected by which among these?
a. Generator reactance
b. Line losses
c. Excitation of generators
d. All of these
Q. What is power system stability?
a. The maximum power flow possible through a particular component connected in the power system.
b. The ability of the power system to regain the state of operating equilibrium point when the system is subjected to any disturbances.
c. It is a phenomenon in which a power system losses its operating equilibrium when subjected to large disturbances.
d. All of these
Q. The power factor angle of a purely inductive circuit is:
a. 45 degree
b. 60 degree
c. 75 degrees
d. 90 degree