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WorksheetsPower factor
Total questions: 10
Worksheet time: 5mins
What is maximum value of power factor?
0.5
1
1.5
0.95
Active power and apparent power are respectively represented by?
kW and kVAR
kVAR and kVA
kVA and kVAR
kW and kVA
The primary reason for the low power factor is due to the installation of
Induction motors
DC motors
Synchronous motors.
Commutator motors.
Power factor is a ratio of:
True power to apparent power
Apparent power to true power
Sum of real and reactive to apparent power
Apparent power to (real – reactive) power
Power factor can be mathematically expressed as:
P/Q
Q/P
P/S
S/P
A circuit having poor power factor will draw:
No current
Low current
Normal current
High current
The power factor of ac circuit lies between
0 and 1
-1 and 1
0 and -1
None of the above
Low power factor has a drawback of
Increased transmission and distribution losses
Poor voltage regulation
High cost of equipment for given load
All of above
The power factor of an ac circuit is equal to:
Cosine of the phase angle
Sine of the phase angle
Tangent of the phase angle
Cotangent of the phase angle
If power factor is expressed as a number, the digit 1 indicates:
Power factor is unity
Power factor is only 1%
Power factor is too poor
None of above
