Capacitors for power factor correction are rated in_________?

Related Mcqs:

1. The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is__________?

   A. 12 kW
   B. 22 kW
   C. 32 kW
   D. 64 kW

2. The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?

   A. 4 kVAR
   B. 6 kVAR
   C. 8 kVAR
   D. 16 kVAR

3. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to__________?

   A. average voltage
   B. r.m.s. voltage
   C. peak voltage
   D. none of the above

4. Power factor of an inductive circuit is usually improved by connecting capacitor to it in____________?

   A. parallel
   B. series
   C. either A. or (b)
   D. none of the above

5. Power factor of the following circuit will be unity

   A. inductance
   B. capacitance
   C. resistance
   D. both A. and B.

6. Power factor of the following circuit will be zero__________?

   A. resistance
   B. inductance
   C. capacitance
   D. both B. and C.

7. Power factor of the system is kept high__________?

   A. to reduce line losses
   B. to maximise the utilization of the capacities of generators, lines and transformers
   C. to reduce voltage regulation of the line
   D. due to all above reasons

8. The power factor at resonance in R-L- C parallel circuit is________?

   A. zero
   B. 0.08 lagging
   C. 0.8 leading
   D. unity

9. The power factor of a D.C. circuit is always__________?

   A. less than unity
   B. unity
   C. greater than unity
   D. zero

10. All definitions of power factor of a series R-L-C circuit are correct except__________?

    A. ratio of net reactance and impedance
    B. ratio of kW and kVA
    C. ratio of J and Z
    D. ratio of W and VA