Exam Details
| Subject | Thermofluid Engineering | |
| Paper | ||
| Exam / Course | Diploma in Mechanical Engineering (DMEVI)& B.Tech. MECHANICAL ENGINEERING 1-4 (BTMEVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
What is the dimensional representation of
Power
Modulus of elasticity
Specific weight
Angular velocity
Viscosity
Is it possible to accelerate a gas to a supersonic velocity in a converging nozzle? Explain.
What is a Newtonian fluid? How does the dynamic viscosity of liquids and gases vary with temperature
What is cavitation Also, define 'net positive suction head' and 'required net positive suction head'. Explain how these two quantities are used to ensure that cavitation does not occur in a pump.
Prove that the point of maximum entropy on the Fanno line for the adiabatic steady flow of a fluid in a duct corresponds to the sonic velocity Ma 1.
The absolute pressure in water at a depth of 5m is read to be 145 kPa.
Determine
the local atmospheric pressure, and
the absolute pressure at a depth of 5 m in a liquid whose specific gravity is 0·78 at the same location.
4. Derive an expression for area velocity relationship for a compressible fluid in the form
dA/A dV/V 1).
5. A steady two-dimensional, incompressible flow field in the xy-plane has a stream function given by
w ax^2 by^2 cx dxy
where c and d are constants.
Obtain expressions for the velocity components u and v.
Verify that the flow field satisfies the incompressible continuity equation.
The velocity profile in fully developed laminar flow in a circular pipe of inner radius R 2 cm, in is given by
Determine the average and maximum velocities.in the pipe and the volume flow rate.
What is a Pitot tube How will you determine the velocity at any point with the help of a Pitot tube
7. Water flows through a pipe AB of diameter d1= 50 mm which is in series with a pipe of diameter d2 70 mm in which the mean velocity V2 3 m/sec. At the pipe forks and one branch CD is of diameter d3 such that the mean velocity V3 1.5 m/sec. The other branch CE is of diameter d4 35 mm and the conditions are such that the discharge Q2 from BC divides so
that Q4 Q3/2.
Calculate the values of Q3, Q4, and V4.
8. Briefly explain the construction and working of a Pelton turbine and derive an expression for maximum hydraulic efficiency.
9. Discuss in general the main operating characteristics of a hydraulic turbine. Which of the Pelton, Francis and Propeller turbines gives better off-design performance and why?
10. Prove that for a steady laminar flow between two fixed parallel plates, the velocity distribution across a section is parabolic and that the average velocity is 2/3rd of the
maximum velocity.
Power
Modulus of elasticity
Specific weight
Angular velocity
Viscosity
Is it possible to accelerate a gas to a supersonic velocity in a converging nozzle? Explain.
What is a Newtonian fluid? How does the dynamic viscosity of liquids and gases vary with temperature
What is cavitation Also, define 'net positive suction head' and 'required net positive suction head'. Explain how these two quantities are used to ensure that cavitation does not occur in a pump.
Prove that the point of maximum entropy on the Fanno line for the adiabatic steady flow of a fluid in a duct corresponds to the sonic velocity Ma 1.
The absolute pressure in water at a depth of 5m is read to be 145 kPa.
Determine
the local atmospheric pressure, and
the absolute pressure at a depth of 5 m in a liquid whose specific gravity is 0·78 at the same location.
4. Derive an expression for area velocity relationship for a compressible fluid in the form
dA/A dV/V 1).
5. A steady two-dimensional, incompressible flow field in the xy-plane has a stream function given by
w ax^2 by^2 cx dxy
where c and d are constants.
Obtain expressions for the velocity components u and v.
Verify that the flow field satisfies the incompressible continuity equation.
The velocity profile in fully developed laminar flow in a circular pipe of inner radius R 2 cm, in is given by
Determine the average and maximum velocities.in the pipe and the volume flow rate.
What is a Pitot tube How will you determine the velocity at any point with the help of a Pitot tube
7. Water flows through a pipe AB of diameter d1= 50 mm which is in series with a pipe of diameter d2 70 mm in which the mean velocity V2 3 m/sec. At the pipe forks and one branch CD is of diameter d3 such that the mean velocity V3 1.5 m/sec. The other branch CE is of diameter d4 35 mm and the conditions are such that the discharge Q2 from BC divides so
that Q4 Q3/2.
Calculate the values of Q3, Q4, and V4.
8. Briefly explain the construction and working of a Pelton turbine and derive an expression for maximum hydraulic efficiency.
9. Discuss in general the main operating characteristics of a hydraulic turbine. Which of the Pelton, Francis and Propeller turbines gives better off-design performance and why?
10. Prove that for a steady laminar flow between two fixed parallel plates, the velocity distribution across a section is parabolic and that the average velocity is 2/3rd of the
maximum velocity.
Other Question Papers
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Subjects
- Advanced Dynamics Of Machine
- Automobile Engineering
- Combustion Engineering
- Computer Aided Manufacturing
- Computing Aided Design
- Design of Machine Elements
- Engineering Metallurgy
- Engineering Thermodynamics
- Experimental Stress Analysis
- Finite Element Analysis
- Fluid Mechanics
- Heat And Mass Transfer
- Heat Transfer
- I.C. Engines
- Industrial Engineering
- Industrial Ergonomics
- Industrial Measurement And Quality Control
- Industrial Organization And Management
- Kinematics and Dynamics of Machines
- Machine Design - I
- Machine Design-Ii
- Machine Drawing
- Machines Tools
- Maintenance Engineering
- Material Science
- Materials Handling
- Mechanical System Design
- Mechanical Vibration
- Mechanics Of Materials
- Mechatronics
- Metrology
- Metrology And Quality Control
- Non-Conventional Energy Resources
- Non-Destructive Testing
- Nuclear Power Engineering
- Optimisation Techniques In Engineering
- Optimization For Engineering Design
- Power Plant Engineering
- Power Transmitting Elements
- Product Development And Design
- Production And Operations Management
- Production Technology - Ii
- Production Technology-I
- Refrigeration And Air Conditioning
- Refrigeration System
- Robotics
- Safety Engineering
- Technical Entrepreneurship
- Thermal Engineering
- Thermal Engineering - I
- Thermofluid Engineering
- Total Quality Management (Tqm)
- Tribology
- Turbo Machines
- Unconventional Manufacturing Processes
- Welding Engg.