II-B.Tech I-Semester Supplementary Examinations, May, 2004 THERMODYNAMICS (Common to Mechanical Engineering, Mechatronics, Production Engineering)
1.a) b)
Max. Marks: 70
Answer any FIVE questions All questions carry equal marks --Explain the term state, path, process and cyclic process. Discuss the concept of continuum in thermodynamics.
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Time: 3 hours.
A reciprocating air compressor installed in a fertilizer factors takes in air at 1 bar and 20 0C and delvers at 6 bar. Calculate the work done, Heat transfer and change in internal energy per kg of air compressed if the comparison followings. a) Isothermal b) Reversible adiabatic c) Pole tropic with indore as 1.25. The changes in potential and kinetic energies may be neglected.
3.a) b)
State the limitations of first law of thermodynamics. A reversable heat pump is used to maintain a temperature of 0 0C in a refrigerator when it rejects the heat to the surroundings at 25 0C. If the heat removal rate from the refrigerator is 1440 KJ/Min. Determine the c.o.p of the machine and work input required. If the required input to run the pump is developed by a reversible engine which receives heat at 380 0C and rejects heat to atmosphere, then the determine the overall c.o.p of the systems.
4.
A mixture of 25% nitrogen and 75% Hydrogen by volume is compressed icsentropically from 300 K and 100 KPA to 500 KPa in the first stage of multistage compressor in a fertilizer plant. The compressor to still higher pressure is achieved in subsequent stages after the gas mixture is passed through the intercooler. Find the temperature of the gas mixture after compressor as well as the work required per unit maas of the mixture. Also evaluate the entrops change for each gas. Assume that the mixture behaves like an ideal gas.
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2.
At the beginning of the compression process of diesel cycle operating with compression ratio of 18, the temperature is 300 K and the pressure of 0.1 Mpa. If the cut off ratio is 2, calculate. a) The temperature and pressure at the end of each process of the cycle. b) Thermal efficiency. c) Mean Effective pressures. Contd..2
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5.
Code.No: 210352
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OR
Deduce an expression for the non-flow availability for a system. A 4-Kg of iron is heated from room temperature of 32 0C to 420 0C by heat source at 600 0C. What is the irreversibility in the process? Assume for Iron Cp= 0.450 KT/KgK.
7.
Air at 20 0C, 40% RH is mixed adiabatically with air at 40 0C, 40% RH in the ratio of the former with 2 Kg of the later (on drgbases) Find the final condition of air.
8.
A vapour compression refrigeration system uses R-12 and operates between pressure limits connects of 0.745 and 0.15 Mpa. The vapour entering the compressor has a temperature of -100C and the liquid leaving the condenser is at 280C. A refrigerating load of 2KW is required. Determine the cop and swept volume of the compressor if at has a volumetric efficiency of 76% and rates at 600rpm.
starter, (iii) Auto transformer starter limiting the supply line starting current to · twice the full-load value. Find the auto-transformer tapping in this case. - - -.
1.a) Explain with a neat sectional view the operation and advantages of hot blast · cupola. b) Discuss the various types of refractories used for cupola lining.
5.a) What is sine bar. Sketch an arrangement for any one of the applications. b) Describe the constructional features and working of optical collimator.
Polynomials in single variable are stored in the form of linked lists. Each · structure has space for one coefficient and one exponent and a link. Assume.
armature and field resistances are 0.03 ohm. And 60 ohm ... 6.a) Explain with the help of diagrams how a rotating magnetic field is produced in · the air gap of a ...
Explain in detail gas liquid contact in mechanically agitated vessels. ... b) Derive the expression for height of a water cooling tower by using HTU and NTU.
Explain determinants and use of determinancy diagram. 2.a) ... Draw the E/R model representation of many-to-many relationship and · superfluous entity tables.
b) Give the steps of a registry-based algorithm for finding and using idle · workstations. 4.a) With reference to distributed file system implementation explain i) ...
b) With the help of a neat sketch of psychometric chart show the various psychrometric · processes naming them clearly. c) Explain what effective temperature is ...
b) State the method of manufacturing and special qualities of the following bricks. (i) sand â lime bricks (ii) Fly ash bricks (iii) Stabilised bricks. c) Explain briefly ...
the following (with comments and indentation) · a) To read the ... OR. Develop a complete COBOL program with indentation and comments to do the · following:.
... shown below. Take node 4 as reference · node. 7.a) Obtain the relation between Y and Z parameters. b) Find A B C D parameters of the network shown below.
320256. III-B.Tech. II Semester Supplementary Examinations December 2002/January 2003 · MODELLING OF POWER SYSTEM COMPONENTS · (Electrical and Electronics Engineering) · Time: 3 hours · Max. Marks: 70 · Answer any FIVE questions · All questions carry
c) A simple Delavel steam turbine nozzle ring is supplied with 200 kg/hr of dry · steam at 10 ... iii) The dryness of steam just as it leaves the turbine rotor blading.
10 kVA at 0.8 pf lagging, load B draws 15 kW at a 0.5 pf lagging and load C · dissipates 5 kW at unity pf. (i) Find active power, reactive power and line current.
Code No:220352. II.B.Tech II-Semester. Supplementary ... not to exceed 90 N/mm · 2 · and (ii) The maximum shear stress is not to exceed 45 · N/mm · 2 . Tube.
1011. 7.a) Discuss the generation and detection of pulse width modulation. b) Explain the principle transversal equiliber. 8. Write short notes on the following:.
potential and muscle contraction. 2.a) With a neat ... b) Explain the origin of ECG from the heart muscles. ... 4.a) What are the different types of muscles? Explain ...
... plate capacitor is · equal to the conduction current in the leads. b) Investigate the vector magnetic potential for the infinite, straight, current element · L in free space. 3. Find the magnetic field intensity due to the presence of a finite st
2.a) With a neat sketch explain the operation of a cupola, its charge composition and · control of the melt composition. b) Briefly explain the pressure die casting ...
