Power System(Generation)-07

Generation-07:

156)   Which tariff is most ideal tariff for the consumer?

a. Two part tariff
b. Three part tariff
c. Both (a) and (b)
d. None of the above

157)   What is the difference between two part tariff and maximum demand tariff?

a. A separate meter is used
b. A separate maximum demand meter is used
c. Semi fixed charges are also included
d. All of these

158)   Maximum demand tariff is applied for which kind of consumers?

a. Big consumers
b. Small consumers
c. Residential consumers
d. All of these

159)   Why is Maximum demand tariff not applicable to domestic consumers?

a. Low maximum demand
b. Low load factor
c. Lower energy consumption
d. Low power factor

160)   Why is a big consumer charged at a lower rate than the small consumer?

a. Their maximum demand is small.
b. It improves the load factor.
c. Both (a) and (b).
d. None of these.

161)   What is the power factor tariff?

a. It considers only maximum demand.
b. It considers only semi fixed charges and the power factor.
c. It considers only power factor.
d. It considers the load factor.

162)   What is/are the consequence/s of low power factor?

a. Increases the rating of station equipments only
b. Only line losses increases
c. Both (a) and (b)
d. None of these

163)   A consumer having lower power factor contributes towards which factor?

a. Semi fixed charges.
b. Fixed charges.
c. Running charges.
d. Penalty is imposed.

164)   Which tariff is also known as the average power factor tariff?

a. Sliding scale tariff
b. kW tariff
c. kVAR tariff
d. kVA maximum demand tariff

165)   What is maximum value of power factor?

a. 0.5
b. 1
c. 1.5
d. 0.95

166)   Active power and apparent power are respectively represented by _________.

a. kW and kVAR
b. kVAR and kVA
c. kVA and kVAR
d. kW and kVA

167)   Which among the following happens in a low power factor?

a. Large kVA rating of the equipment.
b. Greater conductor size.
c. Reduced handling capacity of the system.
d. All of the above.

168)   Lower power factor is usually not due to ____________.

a. Discharge lamp
b. Arc lamps
c. Incandescent lamps
d. Induction furnace

169)   For a consumer what is the most economical power factor?

a. 0.25 – 0.5 lagging
b. 0.25 – 0.5 leading
c. 0.85 – 0.95 lagging
d. 0.85 – 0.95 leading

170)   The primary reason for the low power factor is due to the installation of

a. Induction motors
b. DC motors
c. Synchronous motors
d. Commutator motors

171)   For which among the following consumers is penalty imposed for low power factor?

a. Residential and commercial consumers.
b. Industrial consumers.
c. Agricultural consumers.
d. All of the above.

172)   Power factor can be improved by connecting which among these?

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

173)   What is the advantage of the static capacitors?

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

174)   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.

175)   Phase advancers are used for which among the following machines?

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

176)   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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