Exam Details
| Subject | Energy Conversion | |
| Paper | ||
| Exam / Course | Bachelor of Technology in Mechanical Engineering (Computer Integrated Manufacturing) BTME | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 5 IBME-031I
B.Tech. MECHANICAL ENGINEERING (COMPUTER INTEGRATED MANUFACTURING)
OJ"
Term-End Examination
June, 2016
BME-031 ENERGY CONVERSION
Time: 3 hours Maximum Marks: 70
Note: Answer any seven questions. All questions carry equal marks. Use of steam tables and scientific calculator is allowed.
1. Show the Rankine cycle on a PV diagram. Determine the work done. How is this cycle modified? Explain.
Show the pressure variation in a petrol engine cylinder, as the crank rotates. 5+5
2. How does a 2-stroke engine work? Explain with sketches how suction, compression, power and exhaust processes take place. Why is fuel-air mixture first compressed in crank case?
What is the function of a condenser in a steam thermal power plant? Explain with the help of Rankine cycle. Sketch a surface condenser. 5+5
3. What are the different types of coal Which of these coals contains maximum moisture and which contains maximum carbon?
Describe the proximate and ultimate analysis of coal. How do you find water content of coal Mention the liquid fuels that are used in a boiler. 5+5
4. Differentiate between Reheat and Regenerative cycles for power plants.
Derive the expression for the efficiency of Otto cycle. 5+5
5. What is the function of spark plug in a petrol engine? How does combustion occur in a diesel engine? Give a simple sketch of a spark plug.
Differentiate between boiler mountings and boiler accessories. Give two examples and sketch one boiler mounting. 5+5
6. In how many different forms is energy available on the Earth Classify them into two groups. Which form of energy is most widely used
Explain the following laws of thermochemistry
Law of Lavoisier and Laplace
Hess's law of constant heat summation 5+5
7. How do you classify the internal combustion engines Mention the cycles on which these engines work. Why is it necessary to cool an I.C. engine?
With a neat sketch, explain the functioning of a 4-stroke petrol engine. What is the other type of engine and what advantages does it offer over a 4-stroke engine? 5+5
8. With the help of neat sketches, explain the working principle of a nuclear power plant. State the functions of the following parts of a nuclear power plant:
Nuclear reactor
Moderator
Control rod
The equivalent of evaporation of a boiler is 10.4 kg/kg of fuel. The boiler produces 15 T/hr of steam at 2.00 MN/mA2 . Feed water temperature is 40°C. Fuel consumption is 1650 kg/hr. Find the boiler efficiency and the condition of steam produced. Take calorific value of fuel 29800 kJ/kg. 5+5
9. State the advantages and disadvantages of nuclear power plants over coal based power plants.
A trial was conducted on a two-stroke cycle 4-cylinder gasoline engine having 10 cm bore and 12 cm stroke. The net dynamometer load was 310 N at a radius of 40 cm when the engine speed was 2050 rpm. At the same speed and throttle opening, the engine required 6 kW to motor it with the ignition switch off.
During the 3-minute run at this speed and power the engine consumed 0.52 kg of fuel with calorific value of 42100 kJ/kg and 24 kg of cooling water was circulated through the jacket. The temperature rise of cooling water was by 60°.
Determine:
Mechanical efficiency
Indicated M.E.P.
Brake thermal efficiency 5+5
10. In a gas turbine plant, air compressor takes in air at a temperature of 15°C and compresses it to 4 times the initial pressure with an isentropic efficiency of 82%. The air is then passed through a regenerator before reaching the combustion chamber. The effectiveness of the regenerator is 78%. The maximum temperature of the cycle is 600°C and the isentropic efficiency of the turbine is 70%. Find the thermal efficiency of the plant. Take R 0.287 kJ/kg K
A diesel fuel contains 70% 10% H2, O2, S and rest incombustible by weight. If air contains 23% oxygen by weight, find the amount of air required for complete combustion of 1 kg fuel. 5+5
B.Tech. MECHANICAL ENGINEERING (COMPUTER INTEGRATED MANUFACTURING)
OJ"
Term-End Examination
June, 2016
BME-031 ENERGY CONVERSION
Time: 3 hours Maximum Marks: 70
Note: Answer any seven questions. All questions carry equal marks. Use of steam tables and scientific calculator is allowed.
1. Show the Rankine cycle on a PV diagram. Determine the work done. How is this cycle modified? Explain.
Show the pressure variation in a petrol engine cylinder, as the crank rotates. 5+5
2. How does a 2-stroke engine work? Explain with sketches how suction, compression, power and exhaust processes take place. Why is fuel-air mixture first compressed in crank case?
What is the function of a condenser in a steam thermal power plant? Explain with the help of Rankine cycle. Sketch a surface condenser. 5+5
3. What are the different types of coal Which of these coals contains maximum moisture and which contains maximum carbon?
Describe the proximate and ultimate analysis of coal. How do you find water content of coal Mention the liquid fuels that are used in a boiler. 5+5
4. Differentiate between Reheat and Regenerative cycles for power plants.
Derive the expression for the efficiency of Otto cycle. 5+5
5. What is the function of spark plug in a petrol engine? How does combustion occur in a diesel engine? Give a simple sketch of a spark plug.
Differentiate between boiler mountings and boiler accessories. Give two examples and sketch one boiler mounting. 5+5
6. In how many different forms is energy available on the Earth Classify them into two groups. Which form of energy is most widely used
Explain the following laws of thermochemistry
Law of Lavoisier and Laplace
Hess's law of constant heat summation 5+5
7. How do you classify the internal combustion engines Mention the cycles on which these engines work. Why is it necessary to cool an I.C. engine?
With a neat sketch, explain the functioning of a 4-stroke petrol engine. What is the other type of engine and what advantages does it offer over a 4-stroke engine? 5+5
8. With the help of neat sketches, explain the working principle of a nuclear power plant. State the functions of the following parts of a nuclear power plant:
Nuclear reactor
Moderator
Control rod
The equivalent of evaporation of a boiler is 10.4 kg/kg of fuel. The boiler produces 15 T/hr of steam at 2.00 MN/mA2 . Feed water temperature is 40°C. Fuel consumption is 1650 kg/hr. Find the boiler efficiency and the condition of steam produced. Take calorific value of fuel 29800 kJ/kg. 5+5
9. State the advantages and disadvantages of nuclear power plants over coal based power plants.
A trial was conducted on a two-stroke cycle 4-cylinder gasoline engine having 10 cm bore and 12 cm stroke. The net dynamometer load was 310 N at a radius of 40 cm when the engine speed was 2050 rpm. At the same speed and throttle opening, the engine required 6 kW to motor it with the ignition switch off.
During the 3-minute run at this speed and power the engine consumed 0.52 kg of fuel with calorific value of 42100 kJ/kg and 24 kg of cooling water was circulated through the jacket. The temperature rise of cooling water was by 60°.
Determine:
Mechanical efficiency
Indicated M.E.P.
Brake thermal efficiency 5+5
10. In a gas turbine plant, air compressor takes in air at a temperature of 15°C and compresses it to 4 times the initial pressure with an isentropic efficiency of 82%. The air is then passed through a regenerator before reaching the combustion chamber. The effectiveness of the regenerator is 78%. The maximum temperature of the cycle is 600°C and the isentropic efficiency of the turbine is 70%. Find the thermal efficiency of the plant. Take R 0.287 kJ/kg K
A diesel fuel contains 70% 10% H2, O2, S and rest incombustible by weight. If air contains 23% oxygen by weight, find the amount of air required for complete combustion of 1 kg fuel. 5+5
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Advanced Manufacturing Technology
- CNC Technology
- Computer Aided Design
- Computer Integrated Manufacturing
- Computer Programmingand Application
- ComputerAided Process Planning
- Condition Monitoringand Maintenance Engineering
- Energy Conversion
- Engineering Materials
- Engineering Mathematics Il
- Engineering Mathematics-I
- Engineering Mechanics
- Engineering Thermodynamics
- Fluid Mechanics
- Heat And Mass Transfer
- Industrial Engineering & Operations Research
- Kinematics & Dynamics of Mechanisms
- Machining Technology
- Manufacturing Systems, Integration and Control
- Manufacturing Technology
- Mechanical Engineering Design
- Mechatronics
- Metrology and Instrumentation
- Principles of Electrical and Electronic Sciences
- Production Management
- Quality Engineering
- Robotics
- Safety Engineering
- Soft Computing in CIM
- Strength of Materials
- Tool Engineering and Management