Exam Details
| Subject | Propulsion- I | |
| Paper | ||
| Exam / Course | B.Tech in Aerospace Engineering (BTAE) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Compare Otto, Diesel and Dual cycles for the
same compression ratio and heat input
same maximum pressure and heat input
same maximum pressure and temperature
same maximum pressure and work output
2. A turbojet engine consumes air at the rate of 60·2 kg/s when flying at a speed of 1000 km./hr. Calculate:
Exit velocity of the jet when the enthalpy change for the nozzle is 230 kJ/kg and velocity coefficient is 0.96
Fuel flow rate in kg/s when air-fuel ratio is 70: 1
Thrust specific fuel consumption
Thermal efficiency of the plant, if the combustion efficiency is 92% and calorific value of the fuel used is 42,000 kJ/kg
Propulsive power
Propulsive efficiency
Overall efficiency
3. State the relative advaJ1tages and limitations of the following:
Battery and Magneto ignition system
Splash and Dry sump lubrication system
Propeller and Turboprop engine
Air cooling and Steam cooling
Derive the general heat conduction equation.
Explain Kirchhoff's Law of Radiation.
Briefly describe the working principle of Ramjet engine with a neat sketch.
A simple jet carburetor is required to supply 5 kg of air and 0·5 kg of fuel per minute. The fuel specific gravity is 0·75. The air is initially at 1 bar and 300 K. Calculate the throat diameter of the choke for a flow velocity of 100 m/s. Velocity coefficient is O·8. If the pressure drop across the fuel metering orifice is O.80 that of the choke, calculate orifice diameter assuming, Cdr 0·60 and 1.4, where the symbols have their usual meaning.
Explain the combustion· process of an SI engine.
Derive the expression for calculating mean effective pressure. List the parameter by which performance of an engine is evaluated.
7. Write short notes on any four of the following:
Overall heat transfer coefficient
Black body
Four-stroke CI engine
Two-stroke SI engine
Lubricants and Additives
same compression ratio and heat input
same maximum pressure and heat input
same maximum pressure and temperature
same maximum pressure and work output
2. A turbojet engine consumes air at the rate of 60·2 kg/s when flying at a speed of 1000 km./hr. Calculate:
Exit velocity of the jet when the enthalpy change for the nozzle is 230 kJ/kg and velocity coefficient is 0.96
Fuel flow rate in kg/s when air-fuel ratio is 70: 1
Thrust specific fuel consumption
Thermal efficiency of the plant, if the combustion efficiency is 92% and calorific value of the fuel used is 42,000 kJ/kg
Propulsive power
Propulsive efficiency
Overall efficiency
3. State the relative advaJ1tages and limitations of the following:
Battery and Magneto ignition system
Splash and Dry sump lubrication system
Propeller and Turboprop engine
Air cooling and Steam cooling
Derive the general heat conduction equation.
Explain Kirchhoff's Law of Radiation.
Briefly describe the working principle of Ramjet engine with a neat sketch.
A simple jet carburetor is required to supply 5 kg of air and 0·5 kg of fuel per minute. The fuel specific gravity is 0·75. The air is initially at 1 bar and 300 K. Calculate the throat diameter of the choke for a flow velocity of 100 m/s. Velocity coefficient is O·8. If the pressure drop across the fuel metering orifice is O.80 that of the choke, calculate orifice diameter assuming, Cdr 0·60 and 1.4, where the symbols have their usual meaning.
Explain the combustion· process of an SI engine.
Derive the expression for calculating mean effective pressure. List the parameter by which performance of an engine is evaluated.
7. Write short notes on any four of the following:
Overall heat transfer coefficient
Black body
Four-stroke CI engine
Two-stroke SI engine
Lubricants and Additives
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
- Aerodynamics- I
- Aerodynamics- II
- Aircraft Design/Launch Vehicle/ Rocket Design
- Aircraft Instruments
- Aircraft Safety and Maintenance Engineering
- Aircraft Structures
- Aircraft Systems And Airworthiness Requirements
- Applied Chemistry
- Applied Physics
- Basic Control Theory
- CNS-ATM system
- Composite Materials
- Computer Fundamentals
- Engineering Drawing
- Environmental Science
- Flight Mechanics
- High Speed Aerodynamics
- Instruction To Computer Play Device
- Introduction to Aeronautics
- Introduction To Rocket And Missiles
- Mechanics Design
- Propulsion- I
- Propulsion- II
- Rocket Propulsion
- Space Dynamics
- Strength of Materials
- Technical Writing and Communication Skills
- Workshop Technology