Power factor improvement - MCQs with answers

Power factor improvement - MCQs with answers

Q1. Power factor can be improved by connecting which among these?

a. Static capacitors.
b. Resistors.
c. Synchronous condensers.
d. Both (a) and (c).

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Q2. What is the advantage of the static capacitors?

a. Low losses.
b. Easy installation.
c. Lower maintenance.
d. All of the above.

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Q3. Which among these is the advantage of synchronous condensers?

a. Helps in achieving the stepless control of power factor.
b. The motor windings have a lower thermal stability.
c. The maintenance cost is low.
d. All of the above.

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Q4. Phase advancers are used for which among the following machines?

a. Transformers
b. Synchronous machines.
c. Induction motors.
d. DC machines.

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Q5. What is the main disadvantage of phase advancers?

a. Cannot be used for motors below 200 H.P
b. Produces noise.
c. Can be used where synchronous motor is un admissible.
d. None of these.

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Q6. The most suitable location for the power factor improvement device is

a. Near the electrical appliance which is responsible for the poor power factor.
b. At the sending end.
c. At the receiving end in case of transmission lines.
d. Both (a) and (c).

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