MODEL QUESTION PAPER
Fourth Semester Diploma Examination
ELECTRICAL BOARD
ELECTRICAL POWER GENERATION
TIME: 3 Hours Max Marks: 100
Note: i) Question No. 1 is compulsory.
ii) Answer any six full questions taking two full questions
from each section.
SECTION -I
- a) Fill in the blanks with appropriate word / words : 5X1 = 5
i) The type of turbine used in high head hydro electric power plant is----------
ii) ------------is used to preheat the boiler feed water.
iii) ---------is used to reduce the speed of fast moving neutrons in a nuclear reactor.
iv) High load factor will ------------ the cost of energy generated.
v) --------- are used to improve the power factor of the generating station.
b) List the various sources of energy and briefly explain their classification. 5
SECTION-II
- a) Draw the general layout of high head hydro electric power plant and explain
the function of any three components. 7
b) Explain with diagram the construction and working of Pelton wheel turbine. 5
c) List any three merits and demerits of Hydro power plant. 3
- a) A hydro power plant operates under an effective head of 100 m and a discharge of
200 cubic metre / sec. If the efficiency of turbine alternator set is 90 %, find the
power developed . 4
b) Draw the general layout of thermal power plant and explain its operation. 8
c) Compare thermal and hydro power plants 3
4. a) With a neat diagram explain construction and working of economizer. 5
b) Draw the schematic diagram of Nuclear power plant and explain the function of
each component. 7
c) Briefly explain disposal of nuclear waste in nuclear power plant 3
SECTION – III
5 a) List the merits and demerits of Diesel power plant 3
b) List the applications of Diesel power plant. 3
c) Draw the schematic diagram of combined cycle gas power plant. And Mention its
main features. 9
6. a) Draw the schematic diagram of central receiver type solar thermal power plant and
Explain its operation 7
b) Explain Photovoltaic Hybrid power plant with block diagram. 5
c) Compare solar photovoltaic and solar thermal power plants. 3
7. a) Explain the working of horizontal axis wind turbine generator with diagram. 7
Define the terms pitch angle, pitch control and yaw control.
b) List the factors to be considered for site selection of wind energy generation. 3
c) Briefly explain with diagram double basin type tidal power plant. 5
SECTION IV
8. a) Explain with diagram movable drum type biogas plant. 5
b) List the merits and demerits biomass power plant. 4
c) Explain with block diagram static excitation system. 6
9. a) Define the following as related to power plants: 6
i) Load factor
ii) Plant capacity factor
iii) Plant utilization factor.
b) List the factors on which the cost of energy depends. 3
c) A generating station has an installed capacity of 50,000 KW and delivers
220 X 106 units per annum. If the annual fixed charges are Rs.160 per KW installed
capacity and running charges are 4 paise per Kwh, determine the cost per energy
generator. 6
10. a) Define fuel cell.
Explain with diagram the working principle and operation of fuel cells. 7
b) List the effects of low power factor on power plant. 3
c) Explain the meaning of tariff and State the objectives of tariff. 5
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