Exam Details
| Subject | Heat And Mass Transfer | |
| 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 | June, 2015 | |
| City, State | new delhi, |
Question Paper
Brief about various modes of heat transfer and explain the mechanism of thermal conduction in liquids.
A brick wall, 25 cm thick, is faced with concrete 5 cm thick. The thermal conductivity of brick is 0·69 while that of the concrete is 0·93 W/m-K. If the temperature of the exposed brick face is 30°C and that of concrete is find the heat lost per hour through a wall of 10 m x 5 m. Also determine the interface temperature.
Brief about effectiveness and efficiency of the fin and also explain the variation of heat loss from fins along the length of the
A plane wall is fitted with rectangular fins of thermal conductivity of 50 kcal/m-hr°-C and profile area of 1·75 cm^2 The atmospheric temperature is 30°C and surface conductance is 200 kcal/m^2-hr°-C. If the fin base temperature is 250°C, find the maximum heat dissipation possible from one metre width of fin.
What do you understand by "critical thickness of insulation" Brief about McMillan's Analysis of "economical thickness of insulation" for flat surfaces.
An electric cable of 10 mm diameter is to be laid in atmosphere at 20°C. The estimated surface temperature of the cable due to heat generation is 65°C. Find the maximum percentage increase in heat dissipated when the wire is insulated with rubber having K 0·155 W/m-K. Take h =8·5
Brief about Energy Transfer mechanism through the Boundary layer. Also explain about Hydrodynamic and Thermal Boundary layers.
Derive an expression for heat flow over a flat plate.
Explain about the mechanism of heat flow by natural convection, with suitable diagram.
A vertical pipe of 5 cm diameter carrying hot water is exposed to ambient air at 15°C. If the outer surface of the pipe is 65°C, find the heat loss from one metre height of the pipe per hour.
Explain about Black Body and Monochromatic Radiation using a suitable diagram.
Derive an expression for Lambert's Cosine Law.
7. Write short notes on the following:
Kirchhoff's Law
Fick's Law of Diffusion
Compact Heat Exchanger
Effect of Non-condensable Gases
A brick wall, 25 cm thick, is faced with concrete 5 cm thick. The thermal conductivity of brick is 0·69 while that of the concrete is 0·93 W/m-K. If the temperature of the exposed brick face is 30°C and that of concrete is find the heat lost per hour through a wall of 10 m x 5 m. Also determine the interface temperature.
Brief about effectiveness and efficiency of the fin and also explain the variation of heat loss from fins along the length of the
A plane wall is fitted with rectangular fins of thermal conductivity of 50 kcal/m-hr°-C and profile area of 1·75 cm^2 The atmospheric temperature is 30°C and surface conductance is 200 kcal/m^2-hr°-C. If the fin base temperature is 250°C, find the maximum heat dissipation possible from one metre width of fin.
What do you understand by "critical thickness of insulation" Brief about McMillan's Analysis of "economical thickness of insulation" for flat surfaces.
An electric cable of 10 mm diameter is to be laid in atmosphere at 20°C. The estimated surface temperature of the cable due to heat generation is 65°C. Find the maximum percentage increase in heat dissipated when the wire is insulated with rubber having K 0·155 W/m-K. Take h =8·5
Brief about Energy Transfer mechanism through the Boundary layer. Also explain about Hydrodynamic and Thermal Boundary layers.
Derive an expression for heat flow over a flat plate.
Explain about the mechanism of heat flow by natural convection, with suitable diagram.
A vertical pipe of 5 cm diameter carrying hot water is exposed to ambient air at 15°C. If the outer surface of the pipe is 65°C, find the heat loss from one metre height of the pipe per hour.
Explain about Black Body and Monochromatic Radiation using a suitable diagram.
Derive an expression for Lambert's Cosine Law.
7. Write short notes on the following:
Kirchhoff's Law
Fick's Law of Diffusion
Compact Heat Exchanger
Effect of Non-condensable Gases
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
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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.