Power Quality and Management (2180911) MCQs

MCQs of Power Factor

Showing 21 to 29 out of 29 Questions
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21.
An alternator is supplying a load of 300 kW at a power factor of 0.6 lagging. If the power factor is raised to 0.9 lagging, how much more kW can alternator supply ?
(a) 200 kW
(b) 450 kW
(c) 90 kW
(d) 150 kW
Answer:

Option (d)

22.
Which one following devices is not responsible for lagging power factor?
(a) Induction furnace
(b) Induction motor
(c) Capacitor
(d) Transformer
Answer:

Option (c)

23.
For improve the power factor of a single phase motor, the capacitor should be connected in
(a) series with the motor
(b) parallel to the motor
(c) series with the main winding
(d) series with the starting winding
Answer:

Option (b)

24.
Power factor of filament lamp is
(a) unity
(b) zero leading
(c) zero lagging
(d) between unity and zero lagging
Answer:

Option (a)

25.
If the lagging power factor of a load decreases, the line losses will
(a) decrease
(b) increases
(c) Increase or decrease
(d) remain same
Answer:

Option (b)

26.
What is the formula of power factor ?
(a) R/Z
(b) KW / KVA
(c) Active power / Apparent power
(d) All of this
Answer:

Option (d)

27.
Which type of panel are using for improving power factor in industry for load?
(a) APFC
(b) Star-Delta
(c) Soft Panel
(d) All of this
Answer:

Option (a)

28.
For improving power factor, capacitor bank always connected in ________
(a) Star
(b) Delta
(c) Series- parallel
(d) Non of the above
Answer:

Option (b)

29.
A circuit having poor power factor will draw
(a) No current
(b) Low current
(c) Normal current
(d) High current
Answer:

Option (d)

Showing 21 to 29 out of 29 Questions
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