ME010706L02 Turbo Machines B.Tech Model Question Paper : mgu.ac.in
Name of the College : Mahatma Gandhi University
Department : Mechanical Engineering
Subject Code/Name : ME010 706L02-Turbo Machines
Sem : VII
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5097-ME010%20706L02-TURBO%20MACHINES.pdf
MGU Turbo Machines Model Question Paper
Seventh Semester Mechanical Engineering :
ME010 706L02-
PART-A
Each Question carries three marks (3*5=15)
Related / Similar Question Paper : MGU M.Tech Fuel Cell Technology Question Paper
1. State Buckingham’s -theorem
2. Explain the phenomenon of surging in a centrifugal compressor
3. Define slip factor? How can it be reduced?
4. Explain the concept of radial equilibrium in an axial flow compressor
5. What do you mean by compounding of a steam turbine?
PART-B
Each Question carries FIVE marks : (5*5=25)
6. Derive an expression for Utilization factor of turbines
7. A turbine has the following data. Water is directed at an angle of 30 deg to the tangent. Degree of reaction is 0.45, utilization factor is 0.895.The absolute velocity at exit is axial, water enters the rotor with a static pressure 500 kPa and stagnation pressure of 750 kPa. Calculate the inlet blade angle and the work output for a mass flow rate of 10 kg/s
8. Explain the process of cavitation. How can it be avoided?
9. Draw the combined velocity triangle for an axial flow compressor for which the value of degree of reaction is 50%
10. List out the advantages and disadvantages of velocity compounding
PART-C
Each Question carries TWELVE marks :
11. Derive on the basis of dimensional analysis suitable parameters to present the thrust developed by a property. Assume that the thrust P depends upon the angular velocity speed of advance V, diameter D, dynamic viscosity µ mass density elasticity of the fluid medium which can be denoted by speed of sound C in the medium OR
12. Derive Euler turbine equation and explain the three components involved
13. Briefly explain the characteristic curves of centrifugal fans and blowers
OR
14. Explain the various losses occurring during the operation of centrifugal fans and blowers
15. Explain the working principle of a centrifugal compressor. Also draw the enthalpy-entropy diagram for the same
OR
16. A centrifugal compressor runs at a speed of 15000 rpm and delivers 30 kg of air per second. Exit radius is 0.35m, relative velocity at exit is 100 m/s at an exit angle of 75 . Assume axial inlet and T01=300 K and p01= 1 bar. Calculate (a) the torque (b) the power required to drive the compressor (c) the ideal head developed (d) the work done and (e) the exit total pressure
17. Derive an expression for Degree of Reaction for an axial flow compressor
OR
18. Draw the temperature-entropy diagram for a stage of an axial flow compressor. Show that the stagnation enthalpy remains the same in the relative system
19. List out the various performance parameters of an impulse turbine. Derive the expressions for (a) blading efficiency (b) nozzle efficiency and (c) stage efficiency
OR
20. Briefly explain the need for compounding of a steam turbine. What are the three methods of compounding of steam turbines?
Mechanical Engineering
Model Question Paper :
Seventh Semester :
ME010 706L06
Part – A :
1. What are the benefits of filtering molten metal in casting?
2. Briefly explain Die casting alloys?
3. Explain heat treatment in Nickel Alloy Castings?
4. Why shielding gas is used in welding process?
5. What is hyperbaric welding? (5*3 = 15)
Part – B :
1. Explain factors affecting fluidity in casting?
2. Explain gate and runner design in Foundary?
3. Explain vacuum riserless casting?
4. Why stress concentration is more at HAZ?
5. Discuss thermionic emission and non-thermionic emission? (5*5=25)
Part – C :
1. What is meant by de-gasing in metal casting? Explain different methods in degassing? OR
2. Explain semi solid metal processing? Explain its advantages and disadvantages?
3. Explain hot Isostatic pressing of Castings? Write reasons for using HIP. OR
4. With neat sketch, explain cold chamber die- casting process? Write distinction between hot and cold die casting process?
5. Explain semi solid metal casting process? Write application of SSM? OR
6. Explain effects of Alloying and impurity elements in Al alloy Casting?
7. Explain various Mass transfer process in Gas Metal Arc Welding? OR
8. With neat sketch Explain, submerged arc welding?
9. Explain Underwater Welding process and its classifications? OR
10. Why underwater welding is done in hyperbaric environment? What are its advantages and disadvantages? (5*12=60)