This download link is referred from the post: SGBAU B.Tech Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university
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B.Tech. Third Semester (Food, Pulp. & Paper, Oil & Paint, Petro Tech.) (CGS)
11004 : Applied Thermodynamics
3CT 04
AW - 3003
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Time : Three Hours Max. Marks : 80
Notes :
- Answer three questions from Section A and three questions from Section B.
- Due credit will be given to neatness and adequate dimensions.
- Assume suitable data wherever necessary.
- Retain the construction lines.
- Illustrate your answer necessary with the help of neat sketches.
- Use of slide rule logarithmic tables, Steam tables, Mollier's Chart, Drawing instrument, Thermodynamic table for moist air, Psychrometric Charts and Refrigeration charts is permitted.
- Use of pen Blue/Black ink/refill only for writing the answer book.
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SECTION - A
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- a) What is an isothermal process ? Derive an expression for the work done during an isothermal process.
- b) State the first law of thermodynamics and prove that for non-flow process, it leads to the energy equation Q=ΔU+W.
OR
- What are the limitations of first law thermodynamics ? Explain the second law of thermodynamics.
- A fluid system undergoes a non-flow frictionless process following the pressure volume relation, p= 2/v +1.5, where 'p' is in bar and v is in m3. During the process volume changes from 0.15 m3 to 0.05 m3 and system rejects 45 kJ of heat, determine,
- Change in internal energy
- Change in enthalpy
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- Lay down the procedure for determination of minimum air required for complete combustion of coal.
- Describe with the help of neat sketch 'Bomb Calorimeter'.
OR
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- A steam boiler uses pulverized coal in the furnace. The ultimate analysis of coal (by mass) as received is : C 78%, H2 3%, O2 3%, S 1%, ash 10% and moisture 5%. Excess air supplied is 30%. Calculate the mass of air to be supplied and mass of gaseous product formed per kg of coal burnt.
- What are the advantages and disadvantages of mechanical draught ?
- Explain the working with neat sketch of "High Steam low water safety valve".
OR
- Differentiate water tube boiler from fire tube boiler.
- Calculate the mass of the flue gases flowing through the chimney when the draught produced is equal to 1.9 cm of water. Temperature of flue gases is 290°C and ambient temperature is 20°C, the flue gases formed per kg of fuel burnt are 23 kg. Neglect the losses and take the diameter of the chimney as 1.8 m.
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SECTION -B
- Explain with neat sketch :
- Cut-off governing
- Ejector condenser
- How and why does the hypothetical indicator diagram differ from actual indicator diagram?
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OR
- State the advantages of compound steam engine.
- Calculate the indicated power and steam consumption in kg/hr of a double acting steam engine from the following data : Diameter of cylinder = 300 mm ; Stroke =450 mm ; RPM = 120 ; Steam pressure 7 bar and 0.9 dry ; back pressure = 1.2 bar, cut - off takes place at 32% of stroke for both ends.
- Draw the electrical circuit used for battery ignition in a four stroke four cylinder engines. Explain the function of each component.
- List the advantages and disadvantages of a two stroke cycle engine over a four stroke engine.
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OR
- Explain the fuel supply system used in petrol engine with neat sketch.
- The following particulars refer to a two stroke engine : bore = 20 cm ; stroke = 30 cm ; speed = 300 rpm ; Indicated m.e.p. = 275 kN/m2, Net brake load = 610 N ; diameter of brake drum = 1 m ; fuel consumption 4.25 kg/hr : calorific value of fuel = 44000 kJ/kg. Determine :
- I.P.
- B.P.
- Mechanical efficiency
- Indicated thermal efficiency
- Brake thermal efficiency
- Overall efficiency
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- Draw p-v and T-S diagram for a single stage reciprocating air compressor, without clearance. Derive the expression for the work done when compression is -
- isothermal and
- isentropic
- Enumerate the application of compressed air.
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OR
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- What do you mean by multistage compression ? State its advantages.
- A single stage reciprocating compressor takes 1 m3 of air per minute at 1.013 bar and 15°C and delivers it at 7 bar. Assuming that the law of compression is pv1.3 = constant, and the clearance is negligible, calculate the indicated power.
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This download link is referred from the post: SGBAU B.Tech Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university