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Name of the University : Mahatma Gandhi University
Department : Mechanical Engineering
Degree : B.Tech
Subject Code/Name : ME 010 505/Internal Combustion Engines And Combustion
Sem : V
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5350-ME505.doc

MGU Internal Combustion Engines & Combustion Model Paper

B.TECH Degree Examination :
Fifth Semester :
Branch : Mechanical Engineering/Automobile Engineering/Production Engineering
ME 010 505 Internal Combustion Engines And Combustion :
Time : Three Hours
Maximum : 100 Marks

Related : Mahatma Gandhi University Advanced Mechanics of Materials B.Tech Model Question Paper : www.pdfquestion.in/5349.html

Part A

Answer all questions. :
Each question carries 3 marks. :
1. Write down the different classification of IC Engines.
2. Explain a MPFI System.
3. What are the various types of engine cooling systems?
4. List out the effects of detonation.
5. What are the major pollutants in the exhaust gas of SI engines? (5 x 3 = 15 marks)

Part B

Answer all questions. :
Each question carries 5 marks. :
6. Briefly describe the battery ignition system.
7. Describe the following terms:
i) Flash Point and Fire Point
ii) Pour Point and Cloud Point
8. What is flue gas analysis? Explain.
9. Write note on Ignition delay in CI engines.
10. Differentiate between Indicated thermal efficiency, Brake thermal efficiency, Mechanical efficiency and Volumetric efficiency. (5 x 5 = 25 marks)

Part C
Answer any one full question from each module. :
Each question carries 12 marks. :
11. Explain the working of 2-Stroke SI engine. Draw the necessary schematic diagrams along with the P-v and T-s diagrams
Or
12. Briefly describe the working of a Stratified Charge engine.
13. Explain how i) Acceleration Pump and ii) Idling Jet influence the performance of carburetor.
Or
14. Explain the different lubrication systems in IC Engines.
15. Using neat diagrams explain Super-charging and Turbo-charging in IC engines with their advantages and disadvantages.
Or

16. A 6 cylinder 4-Storke petrol engine with a bore of 125 mm and a stroke of 190 mm under test was supplied with petrol of composition C= 82% and H2= 18% by mass. The dry exhaust composition by volume was CO2 =11.19%, O2= 3.61% and N2= 85.2%. Determine the mass of air supplied per kg of petrol, the percentage excess air and volume of mixture per kg of petrol at 700C and 1 bar which were the condition of the mixture entering the cylinder during the test. Also, determine the volumetric efficiency of the engine based on intake conditions when the mass of petrol used per hour was 31.3 kg and the engine speed was 1500 rpm. The petrol is completely evaporated before entering the cylinder and the effect of its volume on the volumetric efficiency should be included. Take the density of petrol vapour as 3.35 times that of air at the same temperature and pressure. 1 kg of air at 00 C and 1.013 bar occupies 0.773 m3. Air contains 23% O2 by mass.

17. Describe the different stages of combustion in SI engines. Also explain abnormal combustion in SI engines.
Or
18. With neat sketches explain the different types of combustion chambers for CI engines.
19. Describe with neat diagram i) Exhaust gas recirculation system, ii) Catalytic convertor and iii) Particulate trap.
Or
20. Explain the procedure for Morse test on IC engines. Show the method for the calculation of friction power. (5 x 12 = 60 marks)

Kinematics of Machinery

Time: 3hrs
Max. Marks: 100
PART A : (3×5)
(Answer All Questions)
1. What is meant by a Grashof mechanism?
2. What is meant by instantaneous center of rotation? How do we know the number of instantaneous centers in a mechanism?
3. What is the significance of Chebychev spacing in linkage synthesis?
4. How do you classify cam followers according to shape?
5. Define pressure angle of a gear.

PART B : (5×5)
(Answer All Questions)
6. What are straight line mechanisms? Describe one type of exact straight line motion mechanism with the help of a sketch.
7. State and prove Arohnold Kennedy’s theorem.
8. Explain the overlay method of graphical synthesis.
9. Deduce the expressions for the velocity and acceleration of a cam follower when it moves with simple harmonic motion.
10. State and derive the law of gearing.

PART C : (12×5)
Module I :
11. Explain the different inversions of the slider crank mechanism.
Or

12. A crank rocker linkage has a 100mm frame, a 25mm crank, a 90mm coupler, and a 75mm rocker. Draw the linkage and find the maximum and minimum values of transmission angle .Locate the both toggle positions and record the swing angle of the rocker.

Module II :
13. Find the velocities of points B, C, and D of the double slider mechanism shown in figure if crank rotates at 42 rad/s ccw. Also find the acceleration of the point D.

14. What is meant by Coriolis component of acceleration? Derive the expression for the same.

Module III :
15. Synthesize a function generator to solve the equation y = 1/x, 1< x < 2 using three precision points.
Or

16. a) Which are the different steps in kinematic synthesis? (6)
b) Draw a crank rocker to give 45º rocker rotations with equal time forward and backward. (6)