POWER GENERATION AND ECONOMICS
( Mcq -1) very important questions
1. The area under the load curve represents ____________
a) the average load on power system
b) maximum demand
c) number of units generated
d) load factor
2. During which time the demand of electrical energy is maximum?
a) 2 A.M. to 5 A.M.
b) 5 A.M. to 12 P.M.
c) 12 P.M. to 7 P.M.
d) 7 P.M. to 9 P.M
3. The load factor is __________
a) always less than unity
b) less than or greater than 1
c) always greater than 1
d) less than zero
4. In practice what is the value of diversity factor?
a) Less than Unity
b) Geater than Unity
c) Equal to or greater than Unity
d) Less than zero
5. ________ is inversely used as base load plant
Ans- nuclear power plant
6. A synchronous condenser is virtually which of the following?
a) Induction motor
b)Under excited synchronous motor
c)Over excited synchronous motor
d) D.C. generator
7. Different generating stations use following prime movers
a)Diesel engine
b) Hydraulic turbine
c)Gas turbine
d) Any of the above
8.Power plant is expected to have the longest life.
a) Steam
b)Diesel
c)Hydroelectric
d)Any of the above
9.Which of the following equipment provides fluctuating load?
a) Exhaust fan
b)Lathe machine
c) Welding transformer
d) All of the above
10. Which of the following generating station has minimum running cost?
a) Nuclear
b) Hydro
c) Thermal
d) Diesel
11. for a consumer most economical power factor is generally
ans - 0.95 lagging
12. The normal connected load of a domestic consumer is usually
a) up to 10 kW
b) 10 to 20 kW
c) 25 to 50 kW
d) 50 to 100 kW.
13. during summer months the increased load due to
a) increased water supply
b) vacation in institutions
c) increased business activity
d) increased use of fans and air conditioners
14. which of the following installations provides peaked load?
a) Arc furnace
b) Air conditioner
c) Air compressor running continuously
d) cold storage plant
15. A load of a consumer is generally measured by
a) volts
b) amp.
c) amp. hour
d) kW
