Power System - Generation Test Set - 6

1)   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).
e. None of the above
Answer  Explanation  Related Ques

ANSWER: Both (a) and (c).

Explanation:
No explanation is available for this question!


2)   A transformer costing Rs 90,000 haws a useful life of 20 years. Determine the annual depreciation charge using straight line method. Assume salvage to be 15,000.

a. 4000
b. 3750
c. 4350
d. 3500
Answer  Explanation  Related Ques

ANSWER: 3750

Explanation:
No explanation is available for this question!


3)   What is tariff?

a. The rate at which electrical energy is produced in the plant.
b. The rate at which electrical energy is supplied to the consumers.
c. Both (a) and (b).
d. None of these.
Answer  Explanation  Related Ques

ANSWER: The rate at which electrical energy is supplied to the consumers.

Explanation:
No explanation is available for this question!


4)   Flat rate tariff is charged on what basis?

a. Connected load.
b. Units consumed.
c. Maximum demand.
d. All of these
e. None of these
Answer  Explanation  Related Ques

ANSWER: Units consumed.

Explanation:
No explanation is available for this question!


5)   Domestic consumers are charged _____________.

a. Flat demand tariff
b. Block rate tariff
c. Flat rate tariff
d. Off peak tariff
Answer  Explanation  Related Ques

ANSWER: Block rate tariff

Explanation:
No explanation is available for this question!


6)   Which tariff is used by the small commercial consumers?

a. Maximum demand tariff
b. Block rate tariff
c. Three part tariff
d. Two part tariff
Answer  Explanation  Related Ques

ANSWER: Block rate tariff

Explanation:
No explanation is available for this question!


7)   Block rate tariff, where energy charge decreases with the increase in energy consumption,

a. Encourages the consumers for more consumption.
b. Discourages the consumers for more consumption.
c. Encourages the consumers to restrict their demand.
d. Encourages the consumers to improve the power factor.
Answer  Explanation  Related Ques

ANSWER: Encourages the consumers for more consumption.

Explanation:
No explanation is available for this question!


8)   Two part tariff is charged on what basis?

a. Connected load
b. Units consumed
c. Maximum demand
d. Both (b) and (c)
Answer  Explanation  Related Ques

ANSWER: Both (b) and (c)

Explanation:
No explanation is available for this question!


9)   Fixed charge is dependent on what factor?

a. Energy consumption
b. Maximum demand
c. Peak load demand
d. All of the above
Answer  Explanation  Related Ques

ANSWER: Maximum demand

Explanation:
No explanation is available for this question!


10)   A variable charge is based on what?

a. Energy consumption
b. Maximum demand
c. Peak load demand
d. All of the above
Answer  Explanation  Related Ques

ANSWER: Energy consumption

Explanation:
No explanation is available for this question!


11)   What is the main disadvantage of two port tariff?

a. He has to pay semi fixed charges.
b. He has to pay fixed charges.
c. He has to pay running charges.
d. None of the above.
Answer  Explanation  Related Ques

ANSWER: He has to pay fixed charges.

Explanation:
No explanation is available for this question!


12)   Which among the following are included in the three part tariff?

i. Fixed charges
ii. Running charges
iii. Semi fixed charges.

a. i, ii and iii
b. i and ii
c. i and iii
d. ii and iii
Answer  Explanation  Related Ques

ANSWER: i, ii and iii

Explanation:
No explanation is available for this question!


13)   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
Answer  Explanation  Related Ques

ANSWER: Three part tariff

Explanation:
No explanation is available for this question!


14)   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
Answer  Explanation  Related Ques

ANSWER: A separate maximum demand meter is used

Explanation:
No explanation is available for this question!


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

a. Big consumers
b. Small consumers
c. Residential consumers
d. All of these
Answer  Explanation  Related Ques

ANSWER: Big consumers

Explanation:
No explanation is available for this question!


16)   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
Answer  Explanation  Related Ques

ANSWER: Low maximum demand

Explanation:
No explanation is available for this question!


17)   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.
Answer  Explanation  Related Ques

ANSWER: It improves the load factor.

Explanation:
No explanation is available for this question!


18)   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.
Answer  Explanation  Related Ques

ANSWER: It considers only power factor.

Explanation:
No explanation is available for this question!


19)   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
Answer  Explanation  Related Ques

ANSWER: Both (a) and (b)

Explanation:
No explanation is available for this question!


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

a. Semi fixed charges.
b. Fixed charges.
c. Running charges.
d. Penalty is imposed.
Answer  Explanation  Related Ques

ANSWER: Fixed charges.

Explanation:
No explanation is available for this question!


21)   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
Answer  Explanation  Related Ques

ANSWER: Sliding scale tariff

Explanation:
No explanation is available for this question!


22)   What is maximum value of power factor?

a. 0.5
b. 1
c. 1.5
d. 0.95
Answer  Explanation  Related Ques

ANSWER: 1

Explanation:
No explanation is available for this question!


23)   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
Answer  Explanation  Related Ques

ANSWER: kW and kVA

Explanation:
No explanation is available for this question!


24)   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.
Answer  Explanation  Related Ques

ANSWER: All of the above.

Explanation:
No explanation is available for this question!


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

a. Discharge lamp
b. Arc lamps
c. Incandescent lamps
d. Induction furnace
Answer  Explanation  Related Ques

ANSWER: Incandescent lamps

Explanation:
No explanation is available for this question!


26)   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
Answer  Explanation  Related Ques

ANSWER: 0.85 – 0.95 lagging

Explanation:
No explanation is available for this question!


27)   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
Answer  Explanation  Related Ques

ANSWER: Induction motors

Explanation:
No explanation is available for this question!


28)   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.
Answer  Explanation  Related Ques

ANSWER: Industrial consumers.

Explanation:
No explanation is available for this question!


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

a. Static capacitors.
b. Resistors.
c. Synchronous condensers.
d. Both (a) and (c).
Answer  Explanation  Related Ques

ANSWER: Both (a) and (c).

Explanation:
No explanation is available for this question!


30)   What is the advantage of the static capacitors?

a. Low losses
b. Easy installation
c. Lower maintenance
d. All of the above
Answer  Explanation  Related Ques

ANSWER: All of the above

Explanation:
No explanation is available for this question!


31)   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.
Answer  Explanation  Related Ques

ANSWER: Helps in achieving the stepless control of power factor.

Explanation:
No explanation is available for this question!


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

a. Transformers
b. Synchronous machines
c. Induction motors
d. DC machines
Answer  Explanation  Related Ques

ANSWER: Induction motors

Explanation:
No explanation is available for this question!


33)   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
Answer  Explanation  Related Ques

ANSWER: Cannot be used for motors below 200 H.P

Explanation:
No explanation is available for this question!