PPE QUESTION BANK

QUESTION BANK
UNIT I - THERMAL POWER PLANTS
PART A (2 marks)

1. What is a thermodynamic cycle?
2. What are the assumptions made
for air standard cycle analysis?
3. Define air standard cycle efficiency.
4. List out the major advantages of
high pressure boilers in modern
thermal power plants.
5. What is the function of
economizer?
6. What are the modern trends in
generating steam of high pressure
boiler?
7. What are types of fluidized bed
boilers?
8. What are all the features of the
high-pressure boilers?
9. What is cooling tower approach?
10. What the advantages of burning
coal are in pulverized from?

PART B (16 marks)

1. Explain the construction and
working of Steam power plant with a
layout. (16)

2. (a) Why are feed water heaters
used? (8)
(b) Explain with a sketch the working
of a Barometric condenser? (8)

3. (a) Discuss the relative merits of
different out plant coal handling. (8)
(b) Describe the hydraulic ash
handling system. (8)

4. (a) Draw a chart showing
operations and devices used in coal
handling plant. (8)
(b) Describe different types of coal
conveyors. (8)

5. What is the importance of thermal
power development in the country?
Describe its development in the last 10
years. (16)

6. Explain the construction and
working of any one High pressure
boiler with a layout. (16)

7. Explain the construction and
working of any one Fluidised bed
boiler with a layout. (16)

UNIT II - HYDRO ELECTRIC POWER
PLANTS
PART A (2 marks)
1. What is the purpose of surge tank
in a hydroelectric power plant?
2. What are the three main factors for
power output of hydroelectric plant?
3. Give an example for a low head
turbine, a medium head turbine and
a high head turbine.
4. What are reaction turbines? Give
example.
5. Differentiate the impulse and
reaction turbine.
6. Define unit speed of turbine.
7. What is the significance of specific
speed of hydraulic turbines?
8. What is the function of surge tank in
a hydro electric power plant?
9. What is a draft tube? In which type
turbine it is mostly used?
10. Write the function of draft tube in
turbine outlet?

PART B (16 marks)

1. Explain the construction and
working of Hydel power plant with a
layout. (16)

2. What are the various factors to be
considered in selecting the site for a
hydro electric power plant and sicuss
about primary and secondary
investigations. (16)

3. Explain the design aspects of a
pelton wheel. (16)

4. Describe the classification of
turbines. (16)

5. What the components of the
Francis turbine and describe briefly.
(16)

6. (a) Explain in detail the spillways,
baffle piers and drainage gallery. (8)
(b) Explain the various factors to be
considerd in the selection of a
hydraulic turbine. (8)

7. (a) What is surge tanks and state its
purpose. (8) (b) Differentiate Francis
turbine between Kaplan turbines. (8)

8. (a) Explain the terms catchment
area, rain fall and run off. (8) (b)
Explain the arrangement of the
components of a hydro electric power
plant with a neat sketch. (8)

UNIT III - NUCLEAR POWER PLANTS
PART A (2 marks)

1. How the nuclear reactors are
classified?
2. Give the requirements of chain
reaction.
3. What is “half life” of nuclear fuels?
4. What do you understand by
moderation?
5. Explain the function of the
moderator.
6. Define the term “Breeding”.
7. What factors control the selection
of a particular type of a reactor?
8. What are the components
pressurized water reactor nuclear
power plant?
9. What are the components of
supercritical water reactor nuclear
power plant?
10. List down the nuclear waste
disposal methods.

PART B (16 marks)

1. Explain the construction and
working of Nuclear power plant with a
layout. (16)

2. (a) What is a chain reaction? How it
is controlled. (5)
(b) Describe the fast breeder reactor.
(6)
(c) What is function of shield? What
are the different types of shields? (5)

3. (a) With neat sketch explain the
boiling water reactor power plant. (8)
(b) What are the advantages and
disadvantages of nuclear power
plant? (8)

4. (a) What are the advantages and
disadvantages of breeder reactor? (5)
(b) What do you mean by fission of
nuclear fuel? (5)
(c) Explain briefly about radiation
hazards and shielding? (6)

5. (a) What do you understand by
thermal shielding? (4)
(b) What are the functions of a
reflector? (4)
(c) Explain the working and
characteristic features of a
homogeneous reactor. (8)

UNIT IV - GAS AND DIESEL POWER
PLANTS
PART A (2 marks)

1. What are the main units in a gas
turbine power plant?
2. How the gas turbine blades are
cooled?
3. Mention the various processes of
the brayton cycle.
4. Define mean effective pressure as
applied to gas power cycles.
5. How it is related to indicated power
of an I.C. engine?
6. Draw the p-V and T-s diagram of
Brayton cycle.
7. Sketch the schematic arrangement
of open cycle gas turbine plant and
name the components.
8. Discuss the effect of inter colling in
a gas turbine plant.
9. What is the principle of operation of
simple jet propulsion system?
10. Why is the maximum cycle
temperature of gas turbine plant
much lower than that of diesel power
plant?
11. List out the inherent advantages of
the combined power cycle.

PART B (16 marks)

1. Explain the construction and
working of Gas turbine power plant
with a layout. (16)

2. (a) Explain with the help of a block
diagram the fuel storage and supply
system of diesel power plant. (8)
(b) Explain with the help of a block
diagram the water cooling system of
diesel power plant. (8)

3. (a) Mention the advantages and
disadvantages of a diesel power plant
over a gas turbine power plant. (8)
(b) Give a maintenance schedule for
Diesel engine power plant. (8)

4. Describe the following systems in
brief with respect Diesel Power Plant.
(a) Fuel storage and supply system (5)
(b) Exhaust system (5)
(c) Lubrication system (6)

5. (a) Draw a neat layout of a diesel
power plant and label all the
components. (10)
(b) List the advantages of diesel power
plant s over other thermal power
plants. (6)

6. (a) Explain the cooling system of a
Diesel power plant. (8)
(b) What are the different types of
engines used in Diesel power plants.
(8)

7. With a neat sketch explain the
working of a simple constant pressure
gas turbine. Mention its advantages
and disadvantages. (16)

8. (a) With help of a block diagram
explain the main components of a
open cycle gas turbine power plant.
(8)
(b) Give the classification of gas
turbine power plants. (8)

9. (a) Give the advantages and
disadvantages of open cycle gas
turbine power plant. (8)
(b) A simple open cycle gas turbine
plant works between the pressures of
1 bar and 6 bar and temperatures of
300 K and 1023 K. The calorific value
of the fuel used is 42 MJ/kg. Find :
i. airfuel ratio
ii. Thermal efficiency of the plant if the
mechanical and generating efficiencies
are 95% and 97% respectively.
Assume air flow = 20 kg/s and
compression and expansion are
isentropic. (8)

UNIT V - NON – CONVENTIONAL
POWER GENERATION
PART A (2 marks)

1. What is geothermal energy?
2. What are the application of
geothermal energy?
3. What are the different geothermal
fluids?
4. What are the forms of geothermal
energy stored deeply inside the earth?
5. What are the important criteria
while selecting the geothermal
energy?
6. What are the different types of
geothermal energy deposits?
7. What are the different working
fluids in binary cycle geothermal
power plants?
8. What are the different types of
OTEC?
9. What are the working fluids in
closed cycle OTEC?
10. What are the components of Tidal
power plants?

PART B (16 marks)

1. Explain the construction and
working of Geo thermal power plant.
(16)

2. What are the different types of
geothermal energy system? (16)

3. Explain the working principle of
OTEC. (16)

4. What are the different types of Tidal
power plants? (16)

5. Explain the Solar thermal central
receiver system. (16)

6. What are the different types of
ocean thermal energy conversion
system? (16)

7. Explain the analysis of a central
receiver system. (16)