Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 5th Sem 70555 Electric Generation And Economics Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE) (2012 Onwards) / (EE) PT /
(Electrical & Electronics) (2012 Batch) (Sem.?5)
ELECTRIC GENERATION & ECONOMICS
Subject Code : BTEE-502
M.Code : 70555
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
What is the difference between base load and peak load?
2.
Define Demand Factor?
3.
What is short term load forecasting?
4.
Differentiate between fixed costs and operating costs.
5.
What are the causes of low power factor?
6.
Why is the availability of water important for a thermal plant?
7.
What is equal incremental cost criterion?
8.
What do you mean by basic rule curve?
9.
What are the different causes of air pollution?
10. Differentiate between topping and bottoming cycles.
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SECTION-B
11. The annual load duration curve of a small hydro-plant shows 438 ? 104 kWh of energy
during the year. It is a peak load plant with 20% annual load factor. Find station capacity.
If plant factor is 15%, find reserve capacity of the plant.
12. Discuss the role of load factor on the cost of electrical energy.
13. A power station has an induction generator giving a constant output of 2 MW at 0.9
power factor leading. In addition there is a synchronous generator. Find the power factor
of synchronous generator when the total load on the station is (a) 10 MW (b) 5 MW at
0.8 lagging power factor each.
14. Explain the difference between operating reserve and spinning reserve.
15. Discuss the methods commonly used for deciding the load allocation between the units of
a power plant.
SECTION-C
16. (a) Discuss the method to determine the capacity of the run off river plant and steam
plant when they supply a given load jointly.
(b) What is the significance of no spill rule curve?
17. (a) How the costs are allocated in cogeneration systems?
(b) What do you mean by inplant cogeneration? Also discuss the benefits of cogeneration
systems.
18. A 400 V 3-phase star connected induction motor draws a current of 25 A at 0.8 lagging
power factor under full load condition. It is desired to install a bank of capacitors to raise
the full load overall power factor of 0.9 lagging. Find the kVAR rating of the star
connected capacitor bank and the value of each capacitor.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021