Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 4th Sem 2140908 Electrical Power Generation Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? IV EXAMINATION ? SUMMER 2020
Subject Code: 2140908 Date:27/10/2020
Subject Name: Electrical Power Generation
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) What is energy? List out all energy sources available in nature.
03
(b) What factors are taken into account while selecting the site for a hydro
04
power station?
(c) Draw a schematic diagram of modern steam power station and explain
07
its various components and their functions in detail.
Q.2 (a) What do you understand by overall efficiency of a power plant? Why
03
is the overall efficiency of thermal power station very low?
(b) Discuss advantages and disadvantages of diesel power plant.
04
(c) What is nuclear reactor? Explain with a neat sketch the various parts of
07
a nuclear reactor.
OR
(c) Classify the hydro turbine according to operating heads. Explain the
07
hydro turbine used for high operating heads.
Q.3 (a) Draw the neat schematic arrangement of a nuclear power station.
03
(b) Explain the working principle of closed cycle gas turbine power plant
04
with its schematic arrangement.
(c) Explain the need of hybrid systems. Discuss solar-wind hybrid power
07
system with suitable diagram and also state its advantages.
OR
Q.3 (a) What do you understand by tariff? Discuss the objectives of tariff.
03
(b) Define: (i) Load factor (ii) Maximum demand (iii) Plant capacity factor
04
(iv) Diversity factor
(c) Define solar cell efficiency. Explain solar photovoltaic cell principle.
07
Discuss current?voltage (I-V) characteristic of solar PV cell.
Q.4 (a) What are
the major components of wind energy conversion systems?
03
(b) Give the comparison of outdoor and indoor substations.
04
(c) A proposed station has the following daily load cycle:
07
Time in 6-8 8-12 12-16 16-20 20-24 24-
Hrs.
06
Load in 20
40
60
20
50
20
MW
Plot the load curve and load duration curve. Find the load factor of the
plant and the energy supplied by the plant in 24 hours.
1
OR
Q.4 (a) Discuss the components of substation in brief.
03
(b) Define grounding. What are the advantages of neutral grounding?
04
(c) What are the different types of bus-bar arrangements used in sub
07
stations? Illustrate your answer with suitable diagrams.
Q.5 (a) How equipment earthing differs from neutral earthing?
03
(b) Write advantages of distributed generation.
04
(c) Explain the working of horizontal and vertical axis wind turbines.
07
OR
Q.5 (a) List out the solar thermal system applications.
03
(b) Discuss the points and write the methods of site selection for locating
04
the wind mills.
(c) Explain arc suppression coil grounding in detail.
07
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This post was last modified on 04 March 2021