Power Quality and Management (2180911) MCQs

MCQs of Electrical Transients

Showing 31 to 33 out of 33 Questions
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31.
If 50 A of current flowing through a coil of inductance L = 20 mH drops to zero in 2 msec, then the voltage generated across the coil is given by
(a) 200 V
(b) 400 V
(c) 500 V
(d) 300 V
Answer:

Option (c)

32.
Electrical utilities switch capacitor banks during peak load hours to offset the ______________ demand of the load
(a) lagging kVA
(b) lagging kVAR
(c) leading kVA
(d) leading kVAR
Answer:

Option (b)

33.
A 2000-kVAR, 13.8-kV, Y-connected capacitor bank is connected at the end of a 25-mile transmission line with an inductive reactance of 0.5 Ω per mile. What is the natural frequency of the current that would be drawn during turn on?
(a) 133 Hz
(b) 166 Hz
(c) 33 Hz
(d) 66 Hz
Answer:

Option (b)

Showing 31 to 33 out of 33 Questions
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