Power Systems

Power System Questions with Answers

1. Load factor of a power station is defined as

A. maximum demand/average load
B. average load x maximum demand
C. average load/maximum demand
D. average load x maximum demand

Ans: C

2. Load factor of a power station is generally

A. equal to unity
B. less than unity
C. more than unity
D. equal to zero Diversity factor is always

Ans: B

3. The load factor of domestic load is usually

A. 10 to 15%
B. 30 to 40%
C. 50 to 60%
D. 60 to 70%

Ans: A

4. Annual depreciation cost is calculated by

A. sinkingfund method
B. straight line method
C. both (a) and (b)
D. none of the above

Ans: C

5. Depreciation charges are high in case of

A. thermal plant
B. diesel plant
C. hydroelectric plant
D. none of the above

Ans: A

6.Demand factor is defined as

A. average load/maximum load
B. maximum demand/connected load
C. connected load/maximum demand
D. average load x maximum load

Ans: B

7. High load factor indicates

A. cost of generation per unit power is increased
B. total plant capacity is utilised for most of the time
C. total plant capacity is not properly utilised for most of the time
D. none of the above

Ans: B

8. A load curve indicates

A. average power used during the period
B. average kWh (kW) energy consumption during the period
C. either of the above
D. none of the above

Ans: B

9. Approximate estimation of power demand can be made by

A. load survey method
B. statistical methods
C. mathematical method
D. economic parameters
E. all of the above

Ans: E

10. Annual depreciation as per straight line method, is calculated by

A. the capital cost divided by number of year of life
B. the capital cost minus the salvage value, is divided by the number of years of life
C. increasing a uniform sum of money per annum at stipulated rate of interest
D. none of the above

Ans: B