Power Systems MCQs : This section focuses on the "Power Systems". These Multiple Choice Questions (MCQs) should be practiced to improve the Power Systems skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Ripple of the DC-output at power converter is ____________
A. maximum value of instantaneous difference between average and instantaneous value
B. minimum value of instantaneous difference between average and instantaneous value
C. average value of output
D. maximum value of instantaneous value
Question 2
Smooth reactor is connected between _____________
A. DC output of converter and load
B. load and ground
C. source and input of converter
D. any of the mentioned
Question 3
Which of the above is not a DC link?
A. Monopolar link
B. Bipolar link
C. Homopolar link
D. None of the mentioned
Question 4
Voltage regulation in the power system is __________
A. rise in voltage at receiving end
B. dip in voltage at receiving end
C. rise in voltage at sending end
D. dip in voltage at sending end
Question 5
Voltage regulation becomes negative for a ______load.
A. leading
B. lagging
C. zero power factor
D. unity power factor
Question 6
Swing equation is very famous for describing the relation between the ___________
A. rotor motion and stator field
B. stator and rotor field
C. load angle and rotor field
D. moment of inertia and rotor motion
Question 7
The transient instabilities can occur in a system by ___________
A. Sudden load changes
B. Switching operation
C. Faults
D. Sudden load changes, switching operation and faults
Question 8
Ferranti effect is not a problem for ________
A. Long Transmission lines
B. Medium Transmission lines
C. Short Transmission lines
D. Transmission line having high capacitance
Question 9
What happens during the Ferranti effect?
A. Receiving end current becomes more than sending end current
B. Receiving end voltage becomes more than sending end voltage
C. Receiving end power becomes more than sending end power
D. Receiving end frequency becomes more than sending end frequency
Question 10
During Ferranti effect the voltage drop across line resistance ___________
A. In phase with reciving end voltage
B. lags behind reciving end voltage
C. lead the receiving end voltage
D. lags behind sending end voltage