St.

Xavier’s Catholic College of Engineering

Chunkankadai, Nagercoil – 629 003
Question Bank
Subject:EY22321 - Power plant Engineering and carbon capture(MEEE)
Unit-1
Course Coutcomes (COs)

CO
Describe the thermodynamic cycles of various conventional power plants
1

CO
Analyze methods of Rankaine cycle improvements such as super heat, reheat and regeneration
2

CO Analyze and suggest measures for improving the performance of gas turbine and diesel power
3 plants

CO classify the different types of turbines used in hydroelectric power plant and reactors used in
4 nuclear power plant and their selection based on the prevailing conditions

CO classify the different types of turbines used in hydroelectric power plant and reactors used in
5 nuclear power plant and their selection based on the prevailing conditions

CL-Cognitive Level; Re-Remember;Un-Understand;Ap-Apply;An-Analyze;Ev-Evaluate;Cr-Create;

Q.
Question Marks CL CO
No.

Part-A

1 State why electricity is the most convenient and preferred form of energy. 2 Re CO1

2 Differentiate load curve and load duration curve. 2 Un CO1

3 State the specialty of Integrated Gasification Combined Cycle. 2 Un CO1

4 In what way a Kalina cycle is different from that of a Rankaine cycle? 2 Un CO1

5 Define the term load factor. 2 Re CO1

6 Define the term capacity factor. 2 Re CO1

7 Define the term diversity factor. 2 Re CO1

8 What are the principal factors involved in fixing of tariff? 2 Re CO1

9 What is a base load power plant? 2 Re CO1

10 What is a peak load power plant? 2 Re CO1

11 Name some power plants that act as base load power plants. 2 Re CO1

12 Give some examples for peak load power plant. 2 Re CO1

 Explain why Integrated Gasification combined cycle is attractive proposition in
13 2 Un CO1
the preent scenario.

14 What is the general form of tariff? 2 Re CO1

What are the various types of powerplants that supply power to the national
15 2 Re CO1
grid and name the power plant which gives the highest contribution?

Part-B

Demonstrate an overview of the present power scenario in India and its global
1 16 Un CO1
standing in terms of the quantum of electrical power produced.

An input - output curve of a 10 MW thermal station is given by an equation I= 5

x 106(18 +12L+0.5L2) kJ/hr, where I is in kJ/hr and L is the load on the power
plant in MW.
2 16 Ap CO1
Find (a) the load at which the efficiency of the plant will be maximum and (b)
the increase in input required to increase the station output from 5MW to 7
MW by using the input -output equation and by incremental rate curve.

The following data pertains to a power plant of 120 MW capacity. The capital
cost is Rs 15000/kW, interest and depreciation is 10% on capital, annual running
charges is Rs 20 x 106, profit to be gained is 10% of the capital,
3 16 Ap CO1
energy consumed by the power plant auxiliaries is 5% of the generated energy,
the annual load factor is 0.6 and the annual capacity factor is 0.5. Calculate (a)
The reserve capacity and (b) Cost of generation per kWhr.

Develop the working principle of an Integrated Gasification Combined Cycle

4 16 Ap CO1
with a neat illustration and state its perceived advantages

What is a Kalina cycle? Throw light on the operational principle of the same and
5 16 Un CO1
discuss its claimed advantages over other cycles.

Define “Connected load”, “Maximum demand”, “Demand factor” and “Load

6 16 Un CO1
factor”. Explain the importance of each in a power plant operation.

What do you understand by base load and peak load? Why are base load
7 16 Un CO1
power plants are loaded heavily?

Define load duration curve. Explain the method of its construction and state its
8 16 Un CO1
advantages in the design of the power plant.

9 Make use of the effect of load factor on the cost of electricity generated. 16 Ap CO1

Utilize the different types of load curves considered to design a power

10 16 Ap CO1
plant? Identify the effect of its nature on the working of a power plant.
Unit-2
Q.
Question Marks CL CO
No.

Part-A

1 Why is feed water treated before using in boiler? 2 Un CO2

2 Differentiate between a nozzle and a diffuser. 2 Un CO2

3 Show the PV and TS diagram of a simple Rankaine cycle. 2 Re CO2

4 Name the different types of condensers used in thermal power plants. 2 Re CO2

5 What is meant by mean temperature of heat addition? 2 Re CO2

6 Give the flow and T-S diagrams of an ideal regenerative cycle. 2 Re CO2

7 Name a boiler that operates at the critical state of steam. 2 Re CO2

8 What is a once thru boiler? Give an example. 2 Re CO2

9 What is supercritical state of steam? 2 Re CO2

10 How are steam turbines classified? 2 Re CO2

11 What is meant by compounding of steam turbines? 2 Un CO2

12 Give an example for velocity compounded turbine 2 Re CO2

13 Name a turbine that operates on pressure-velocity compounding principle. 2 Re CO2

14 Name the methods used for external feed water treatment. 2 Re CO2

What do you understand by economic thickness of insulation in steam piping

15 2 Un CO2
system?

Part-B

Explain the working principle of a Pressurized Fluidized Bed Combustion boiler

1 16 Un CO2
with a suitable diagram. Also list its advantages.

Examine the necessity for boiler feed water treatment and explain the zeolite
2 16 An CO2
process for treating the water externally

A regenerative steam power plant generates 27 MW energy from the electric

generator directly coupled to the turbine. The steam at 60 bar and 4500C is
supplied to the steam turbine. The condenser vacuum is 707.5 mm of Hg. The
steam is bled from the steam turbine at 3 bar. The heating of feedwater is
3 dome in the direct contact heater. Assuming the turbine efficiency of each 16 Ap CO2
portion of expansion is 87%, find (a) The steam bled per kg of steam supplied to
the turbine, (b) The steam generated per hour if 10% of the generated output is
used to drive the pumps, (c) The overall efficiency of the plant if the boiler
efficiency is 90% and alternator efficiency is 95% and mechanical efficiency
 from turbine to generator is 98%. Neglect the pump work in calculating input to
the boiler. The atmospheric pressure is 760 mm of Hg.

What is meant by economic thickness of insulation? Develop an expression for

4 16 Ap CO2
finding economic thickness taking all factors into consideration.

Organize the working of hot- lime soda process with a neat sketch giving
5 different chemical reactions. What are the advantages and disadvantages of 16 Ap CO2
this system over ion-exchange system

Construct 5 different piping supports and mention the use of each in the power
6 16 An CO2
plant.

Model the schematic layout of a modern steam power plant and explain all the
7 16 Ap CO2
circuits of the power plant in detail.

A surface type steam condenser is designed to condense 300 ton of steam per
hr at 0.04 bar pressure and 0.9 dry. The cooling water inlet and outlet
temperatures are 150C and 250C respectively. The overall heat transfer
8 coefficient in the condenser = 3kJ/m2- 0C. The condenser has two water passes 16 Ap CO2
and tubes used are di =17.6mm and do =20mm. Determine the number of tubes
used in one pass and length of each tube if water speed in the condenser tube
is limited to 2.5m/s.

In a reaction turbine, the blade tips are inclined at 350 and 200 in the direction
of blade motion. The guide blades are of the same shape as the moving blades,
but reversed in direction. At a certain place in the turbine, the drum diameter is
9 1 meter and the blades are 10 cm high. At this place, the steam has a pressure 16 Ap CO2
of 1.75 bar and 0.935 dryness. If the speed of the turbine is 250 R.P.M and the
steam passes through the blades without shock, find the mass of steam flow
and power developed in the ring of moving blades.

Analyse the schematic diagram and explain the working of a modern high
10 16 An CO2
pressure boiler highlighting its salient features.

Unit-3
Q.
Question Marks CL CO
No.

Part-A

1 Mention the different thermodynamic processes that constitute a diesel cycle. 2 Re CO3

2 What is the purpose of intercooler in a gas turbine? 2 Re CO3

Name the different methods used to augment the performance of a Brayton

3 2 Un CO3
cycle.
 What is the difference between an open cycle and a closed cycle gas turbine
4 2 Un CO3
power plant?

5 Why diesel power plants are not normally used as base load power plants? 2 Un CO3

6 Mention any four merits of diesel power plant. 2 Un CO3

7 What is the purpose of using intercooler in a diesel engine? 2 Un CO3

8 What are the different types of fuel injection systems used in diesel engines? 2 Re CO3

9 List the factors which affect the performance of gas turbine power plants. 2 Un CO3

10 List the method adopted for circulating the water in a cooling system. 2 Re CO3

11 What are the important functions of a lubrication system? 2 Re CO3

12 Name the different methods used to start a diesel engine 2 Re CO3

13 Define regenerator efficiency. 2 Re CO3

14 What are the major components of gas turbine? 2 Re CO3

15 Enumerate the advantages of a gas turbine power plant. 2 Re CO3

Part-B

Examine the necessity of supercharging in diesel power plant? What are the
methods used to supercharge a diesel engine? What are the advantages of
1 16 An CO3
supercharging as far as the fuel consumption and overall efficiency of the diesel
power plant are concerned?

Examine the effects of intercooling and regeneration on the characteristics of a

2 16 Ap CO3
gas turbine power plant.

An open cycle gas turbine power plant works on Brayton cycle. The maximum
pressure and temperature of the cycle are limited to 5 bar and 900K. The
pressure and temperature of the gas entering the compressor are 1 bar and
27°C. Reheating is used at a pressure of 2.5 bar where the temperature of the
gases is increased to its original turbine inlet temperature. The air flow through
3 16 Ap CO3
the plant is 10kg/sec. Determine the thermal efficiency and the plant capacity
in MW. The exhaust pressure of the turbine is 1 bar. Assume the compression
and expansions are isentropic. Take γ =1.4 for air and gases , Cp = 1 kJ/kg-K for
air and gases and C.V of the fuel = 40000 kJ/kg. Neglect the pressure losses in
the system. Do not neglect the fuel quantity.

A C.I engine working on the dual cycle takes in 2/3rd of its total heat supplied at
constant volume and 1/3rd at constant pressure. Given data is: compression
4 ratio= 13:1, maximum pressure in cycle = 44.6 bar, air intake at 1.013 bar and 16 Ap CO3
15.50C, Cp =1.0 kJ/kg-K, Cv = 0.712 kJ/kg-K. Calculate (a) The temperature of
the five main points of the cycle, (b) The ideal thermal efficiency of the cycle.

Compare the different methods of fuel injection used in diesel plants? Which
5 16 An CO3
method is commonly used in big diesel plant and why?
 Draw a neat diagram of a cooling system used for diesel power plant showing
all the essential components. What are the advantages of double circuit over
6 16 Un CO3
single circuit system? What precautions should be taken to ensure that cooling
is satisfactory?

Examine the starting of diesel plant is more difficult? What different methods
7 16 An CO3
are used for starting diesel engine? Which method is common and why?

Constrct a plant layout for 5 MW diesel power stations showing all the required
8 16 An CO3
equipments. Show the arrangement of the cooling system and engine layout.

The air supplied to a gas-turbine power plant is 10 kg/sec. The pressure ratio is
6 and pressure at the inlet of the compressor is 1 bar. The compressor is two
stage and provided with perfect inter cooler. The inlet temperature is 300 K and
9 maximum temperature is limited 1073 K. Take the following data: Isentropic 16 Ap CO3
efficiency of compressor each stage (ηc) = 80% Isentropic efficiency of turbine
(ηt) = 85%. A regenerator is included in the plant whose effectiveness is 0.7.
Neglect the mass of fuel.

An open cycle gas turbine plant uses heavy oil as fuel. The maximum pressure
and temperature in the cycle are 5 bar and 650°C. The pressure and
temperature of air entering into the compressor are 1 bar and 27°C. The exit
pressure of the turbine is also 1 bar. Assuming isentropic efficiencies of
10 16 Ap CO3
compressor and turbine to be 80% and 85% respectively, find the thermal
efficiency of the cycle. The overall A: F ratio used is 60: 1. Take Cp (for air and
gas) = 1 kJ/kg-0C. and γ (for air and gas) = 1. If the plant consumes 5 kg of fuel/
sec, find the power generating capacity of the plant.

Unit-4
Q.
Question Marks CL CO
No.

Part-A

1 Outline the purpose of surge tank in a hydroelectric power plant. 2 Re CO4

2 What is the difference between atomic number and mass number? 2 Un CO4

3 State the specialty of a fast breeder reactor. 2 Re CO4

What do you understand by the term “tariff”? Also name the different types of
4 2 Re CO4
tariff that are in practice.

5 Describe a Homogeneous Aqueous Reactor. 2 Re CO4

6 List the names of nuclear fuels that are used in nuclear reactors. 2 Re CO4

7 Name few cladding materials used in nuclear reactors. 2 Re CO4

8 What are the various types of coolants. that are used in nuclear reactors? 2 Re CO4

9 Enlist the properties of control rods. 2 Re CO4

10 What are the challenges associated with hydro power plant? 2 Re CO4

11 Name the different types of radiation that emanate from a nuclear reactor core. 2 Re CO4

12 Why is nuclear safety of paramount importance? 2 Un CO4

13 Differentiate between fertile and fissile materials. 2 Un CO4

14 Define the term “breeding ratio”. 2 Re CO4

15 State the purpose of surge tank in a hydro power plant. 2 Un CO4

Part-B

Explain the significance of the contribution of micro and mini hydel power
1 16 Un CO4
plants to the nation’s electricity requirements.

Explain the different tariff methods used to charge the consumers for the
2 16 Un CO4
electricity consumed.

With neat sketches, explain the working principles of (i) CANDU reactor and (ii)
3 16 Un CO4
Fast Breeder reactor used in nuclear power plants.

Explain the nature of pollution from nuclear power plants and discuss
4 16 Un CO4
elaborately the various safety measures adapted by these power plants.

Explain with a neat diagram, the working of a hydro power plant. Also explain
5 16 Un CO4
their application and advantages.

What is unique about the fast breeder reactor? With a neat sketch explain the
6 16 Un CO4
construction and functioning of a breeder reactor with its merits and demerits.

In what way a pumped storage hydro plant is different from that of a storage
7 type of hydro power plant? Through a proper illustration explain the working of 16 Un CO4
a pumped storage system.

What are the basic radioactive pollutants? What are their bad effects on human
8 16 Un CO4
life and natural vegetation?

With neat diagrams, explain the working principles of Pressurized Water

9 Reactor and Boiling Water Reactor and also bring out the differences between 16 Un CO4
these two reactors.

For the same output power, make an in-depth analysis of efficiency, speed,
space occupied freedom from breakdown, ease of repairs, and durability with
10 respect to silt laden water for impulse and reaction turbines. Describe the 16 Un CO4
characteristics of various types of turbines used in hydroelectric power stations
with reference to (i) head, (ii) part load efficiency and maximum efficiency and
(iii) specific speed and explain how these factors aid in the selection of turbines.
Unit-5
Q.
Question Marks CL CO
No.

Part-A

1 What is carbon sequestration? 2 Re CO5

2 How does carbon get into the atmosphere? 2 Un CO5

3 What is the difference between geologic and biologic carbon sequestration? 2 Re CO5

4 How do we reduce greenhouse gases? 2 Un CO5

5 Define carbon cycle? 2 Re CO5

6 What are the primary sources of CO2? 2 Un CO5

7 What is carbon capture and storage? 2 Re CO5

8 How can CO2 be stored in underground? 2 Un CO5

9 How is CO2 trapped in the subsurface? 2 Un CO5

10 What are the characteristics of a subsurface storage complex? 2 Re CO5

11 What are the different storage types for geologic CO2 storage? 2 Re CO5

12 Where around the world is CO2 storage happening today? 2 Re CO5

13 How do we know the CO2 storage is safe? 2 Un CO5

14 How is CO2 storage site monitored? 2 Un CO5

15 What is retrofit in power plant? 2 Re CO5

Part-B

1 Summarize the possible mitigation measures to reduce carbon in atmosphere 16 Un CO5

2 Summarize the 5 principles of net zero emission commitments. 16 Un CO5

3 Organize the different types of carbon capture and storage (CCS). 16 Un CO5

4 Briefly explain the pre-combustion technology with neat sketch. 16 Un CO5

5 Briefly explain the post-combustion technology with neat sketch. 16 Un CO5

6 Explain Oxy-Combustion CO2 Capture and write their applications. 16 Un CO5

7 Briefly explain the chemical looping combustion with neat sketch. 16 Un CO5

8 Develop the principles of pre-combustion and post-combustion processes. 16 Un CO5

Identify the Techno-economic assessment of CO2 capture retrofit to existing

9 16 Un CO5
power plants.
 Develop the specific impacts on integrated coal gasification combined
10 16 Un CO5
cycle (IGCC) power plant design from CO2 capture.