Electrical Engineering · Question Bank

Power Factor Corrections

10 of 23 questions match. Answer in your head first, then check the solution.

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TypeAll 10Problem solving 3Objective 7
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#1📜 EE Pre-Board March 2013📘 PowerhouseEasy
Which of the following is used in power factor correction?
AInduction motor
BLong transmission line
CSynchronous motor
DVoltage regulator
#2📜 EE Pre-Board March 2014📘 PowerhouseEasy
A single – phase load on 220 v takes 5 kW at 0.6 lagging power factor. Find the kVAR size of capacitor, which may be connected in parallel with this motor to bring the resultant power factor to unity.
A6.64
B7.32
C8.66
D6.26
#3📜 EE Pre-Board August 2014📘 PowerhouseEasy
It is desired to correct the 2,400 – KVA 0.65 Lagging power factor load in a plant unity by the installation of a synchronous condenser. Calculate the KVA rating of the latter.
A2,400
B1,825
C1,560
D1,960
#4📜 EE Pre-Board August 2015📘 PowerhouseEasy
A 50-MVA, 11-kV, 3-phase alternator supplies full load at a lagging power factor of 0.7. What would be the percentage increase in earning capacity if the power factor is increased to 0.95?
A26.32
B6.92
C12.76
D35.71
#5📜 EE Pre-Board March 2016📘 PowerhouseEasy
The capacitors of power factor correction are rated in terms of
AKV
BKW
CKVA
DKVAR
#6📜 EE Pre-Board March 2017📘 PowerhouseEasy
In an ac circuit, a low value of KVAR compared with KW indicates
Amaximum load current
Blow efficiency
Chigh power factor
Dunity power factor
#7📘 EE Pocket Reviewer RojasEasy
Other than using capacitors, power factor improvement can also be achieve using which of the following machines?
AA synchronous motor
BA synchronous converter
CA squirrel-cage induction motor
DAny of these
#8📘 EE Pocket Reviewer RojasEasy
Capacitors used in power factor corrections are rated in which of the following units?
AkVA
BkVAR
CkW and kVAR
DkW and kVA
#9📘 EE Pocket Reviewer RojasEasy
How can the power factor of an inductive circuit be improved?
AConnect a series inductor
BConnect a parallel capacitor
CConnect a series resistor
DConnect a parallel inductor
#10📘 EE Pocket Reviewer RojasEasy
Other than using capacitors, power factor improvement can also be achieved using which of the following machines?
AA synchronous motor
BA synchronous converter
CA squirrel-cage induction motor
DAny of these

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