Code No.310351 III-B.Tech I-Semester Supplementary Examinations May/June-2004 THERMAL ENGINEERING-II (Common to Mechanical Engineering, Production Engineering) Time: 3 hours Max. Marks: 70 Note:- 1. Answer any FIVE questions. 2. All questions carry equal marks. 3. Assume any missing data suitably. --1.a) Make a comparison between gas turbines and I.C. engines. b) Explain how the sample carburettor is modified for use in automobile engines.
Write a note on diesel engine injectors. Explain the need for change in ignition timing and the methods used in automobile engines.
3.a) b)
Explain the working of magneto ignition system used in six-cylinder engine. Write a note on automobile radiator.
4.a) b)
Explain the working of pressure lubrication used in automobile engines. Explain the effect of super charging on diesel engine performance.
5.a) b)
Write a note on S.I. engine combustion chambers. Explain the combustion process in diesel engine clearly.
6.
A single cylinder 4-stroke cycle gasoline engine is to operate at 400 rpm and deliver 75 kW with the following details: Break mean effective pressure = 8.4 bar mech. efficiency = 80%; Specific fuel consumption = 0.254 kg/bp kWhr, Lower calorific value of fuel = 44300 kJ/kg. Ratio of stroke to dia = 1 Ratio of compression = 6.5 Determine (i) Bore and stroke (ii) The brake thermal efficiency (iii) Indicated mean effective pressure.
7.
In a gas turbine unit air is taken in at 1 bar and 27oC and is compressed to 4 bar with an adiabatic efficiency of 85%. Heat is added in the combustion chamber so that the temperature is raised to 500oC. The over all efficiency of the nozzle and turbine is 85%. Determine the net power of the installation and over all thermal efficiency for the air flow of 135 kg/mt. Neglect the mass of fuel added. Assume Cp = 1 kJ/kg-K and Cv = 0.714 kJ/kg-K for air and combustion products.
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2.a) b)
8.
Write short note on the following: (a) Anti freeze solutions (b) Cryogenic rocket engines (c) Properties of lubricating oils. ***
4.a) Explain the working of pressure lubrication used in automobile engines. b) Explain the effect of super charging on diesel engine performance. 5.a) Write a ...
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
