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UNIT IPart A

1. What is steady running2. What is Transient operation3. What is back firing4. Define idling in an engine5. What is the effect of inlet and exhaust pressure on mixture requirements6. What are the factors that influence carburetion7. What are the essential features of a carburetor8. What is pre ignition9. What are the effects of pre ignition10. What are the effects of knock in SI engines11. Name some types of combustion chambers in SI engines12. Write a short notes on T- head combustion chamber13. What are the various additives used to suppress knock in SI engines14. Why rich mixture is required for idling15. What is stoichiometric air fuel ratio16. What are different air fuel mixtures on which an engine can operate17. How can the location of the spark plug influence knocking tendency18. What is delay period and what are the factors that affect the delay period?19. Write any four factors that affect the process of combustion20. What is a homogeneous and heterogeneous mixture?21. What is meant by Carburetion?22. What are the functions of a carburettor?23. What is ignition lag24. What is period of afterburning in SI engines25. What are the variables that affect ignition lag26. What is the effect of inlet temp and pressure on ignition lag27. What is the effect of fuel - air ratio on flame propagation28. What is the effect of compression ratio on flame propagation29. Write short notes on effect of turbulence on flame propagation30. What are the engine variables that effect Knock in SI engines.31. How spark advance effects knock in SI engines32. Write any four methods of controlling knock33. What are the methods of detecting knock34. What are the basic requirements of a good combustion chamber35. Write short notes on Side Valve(I-Head) combustion chambers36. Write short notes on Over head valve combustion chamber37. What are the basic types of carburettor38. What are the drawbacks of a simple carburettor

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Part B1. Discuss the design criteria for a S.I engine combustion chamber2. Explain with figures various types of combustion chambers used in SIengines.3. Explain the effect of various engine variables on SI engine Knock4. Explain the phenomenon of knock in SI engines.what are the factors whichinfluence the knock.describe the methods used to supress it.5. Explain the fuel/air mixture requirements for an engine based on variousspeeds.6. With the help of neat sketch explain the working principle of a simplecarburettor7. Explain the following related to SI engines:i)Pre ignitionii)Auto ignitioniii)Knock

8. What is Ignition Lag ?Discuss the effect of engine variables on ignition lag9. Discuss the effect of the following engine variables on flame propagation :

a) Fuel - air ratiob) Compression ratioc) engine loadd) turbulencee) engine speed

10. Discuss the ill effects of detonation11. Explain the two theories of detonation12. Explain the phenomenon of pre-ignition? How pre ignition leads to detonation

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Unit II

Part A

1. What are the stages of combustion in CI engines.2. What is Ignition delay period3. What is period of rapid combustion4. What is contrilled combustion in CI engines.5. What is period of after burning.6. What are the factors that affect delay period.7. What is knock in CI engines.8. State different types of combustion chambers in CI engines.9.Write a short notes on Direct injection combustion chambers.10. What is Pre - Combustion chamber.11.What are homogeneous and heterogeneous mixtures.12. What is turbo charging.13. What are the advantages of turbo charging.14. What are the dis-advantages of turbo charging.15. What is ignition delay period in CI engines16. What is Uncontrolled combustion in CI engines17. What is controlled combustion in CI engines18. What is period of afterburning in CI engines19. What variables affect delay period20. What is the affect of size of droplet on delay period21. What is the affect of compression ratio on delay period22. List various methods to control delay period in CI engine23. What are the methods of generating air swirl in CI engine24. What are the advantages of induction swirl25. What are various cold starting aids in CI engine.

Part B

1. Explain the various stages of Combustion in CI engines.2. Explain the phenomenon of Knock in CI engines.3. Explain various types of Combustion chambers used in CI engines with figures.4. What is meant by delay period. Explain about the types of delay period5. What are the three methods of generating swirl in CI engine combustion chamber

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Unit IIIPART A

1. What are the harmful effects of various pollutants on human beings?2. How unburnt hydrocarbons are formed in SI engines?3. What is the effect of inlet air temperature on “NO” formation in SI engines?4. How aldehyde emissions are formed in CI engines?5. What is the effect of quantity of fuel injected on black smoke formation in SIengines?6. What is a thermal reactor? What for it is used?7. Name few catalysts used for oxidation and reduction of emissions in IC Engineexhaust.8. What are the sources of pollution in I.C. Engine?9. What are the factors contributing to NOx emission?10. What is particulate emission?11. What is aldehyde emission?12. What is meant by fumigation?13. What is gas chromatograph.14. What are the major emissions that come out of engine exhaust.15. What are the causes of HC emissions from SI engine.16. What are the causes of incomplete combustion in an engine.17. What is crankcase blow-by.18. Write a short notes on HC emission in CI engine.19. What are various Non-Exhaust emissions in CI engine.20. What is positive crankcase ventilation.21. What are the major emissions that come out of engine exhaust.22. How oxides of Nitrogen are formed.23. What are the causes of HC emissions from SI engine.24. What are the causes of incomplete combustion in an engine.25. What is crankcase blow-by.26. Write a short notes on HC emission in CI engine.27. What are various Non-Exhaust emissions in CI engine.28. What is positive crankcase ventilation29. What are the sources from which pollutants are emitted from SI engine.30. How compression ratio affects emission control in SI engine.31. What are the basic requirements of a catalytic converter.32. What is a three way catalytic converter.33. What are the various ways of controlling Oxides of nitrogen in exhaust emission34. Write a short notes on Green house effect.35. What is Diesel Smoke36. What are the various types of smoke meters.37. What is the effect of CO emission on human health.

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38. What are the factors that affect the formation of NOx.39. How are Hydro Carbons formed

Part B

1. Explain in detail about the various sources of IC engine responsible for emissionand pollutant formation.2. Illustrate and explain the effects of combustion time and spark timing on “NO”formation in SI engines.3. How the carbon monoxide is formed in SI engines? Explain the effect of O2

concentration on “CO” formation in SI engines.4. Explain in detail about the combined effect of engine speed, cetane number andcombustion time on nitric oxide formation in CI engines.5. Explain in detail about the following:

(i) Blake smoke(ii) White smoke(iii) Blue smoke(iv) Particulates.

6. With the aid of a neat cross sectional sketch explain the construction, working andlimitations of a 3 way catalytic converter.7. Explain in detail about the open and closed type PVC system. Also state that whatfor it is used.8. With the help of a schematic diagram explain the working of CLA(Chemiluminescent analyzer). What for it is used?9. Explain the working of an instrument used for the measurement of CO and CO2

from IC engines.10. What are the operating variables and how they contribute on emissionformation? How can it be controlled?11.Differentiate smoke and particulate emission. Explain the diffusion funnelmethod to measure particulate emission in a diesel engine.12. Explain different methods of smoke measurement.13. (i)Explain PVC system in a diesel engine.(ii)What is the necessity of exhaust gas re-circulation? Explain in detail.14. (i) What are thermal reactors? Explain their constructions.(ii) Explain three way catalytic converter.

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Unit IV

Part A

1. Why alcohols are considered as good SI engine fuels.2. Mention important property changes that take place by the addition of alcohol todiesel.3. Define Fumigation4. What are the advantages of Hydrogen as fuel in SI engine5. What are the demerits of using Hydrogen as fuel in SI engine6. What are the methods of using Natural gas in CI engines.7. What are the advantages of using LPG in engines.8. What are the limitations of using LPG as fuel in IC engines.9. Give the general composition of Bio gas.10. What is Bio diesel.11. What is meant by esterification.12. What is meant by Transesterification.13. What are the advantages of Bio diesel.14. Name some alternative fuels for IC engine.15. What is the reason for development of alternative fuels.16. What are the advantages of using alternative fuels17. What are the disadvantages of alternative fuels.18. What is volatility19. Why volatility is an important quality of SI engine fuel.20. What are the advantages of alcohol as a fuel.21. What are the advantages of using Bio-diesel as fuel for IC engines.22. What are the disadvantages of using Bio-diesel as fuel for IC engines.23. What are the properties of Biogas.24. What are the advantages of using Biogas as fuel.25. What are the disadvantages of using Biogas as fuel for IC engine.26. What are primary fuels27. What are secondary fuels.28. What is the effect of fuel viscosity on diesel engine performance.

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Part A

1. What are the methods of using alcohol fuels in diesel engine and explain any onemethod.2. What are the methods of using Hydrogen in SI engine.3. Discuss the emission and performance characteristics using hydrogen in SIengines.4. Explain the conversion kit required for use of natural gas in CI engines.5. Explain how Biogas is used in diesel engine. Discus the performancecharacteristics.6. What is the engine modification required for using Biodiesel in existing dieselengine.7. Discuss the suitability of Alcohols in diesl engines

8. With a schematic diagram explain the production of Methanol from coal

9. With a schematic diagram explain the production of Methanol from Municipalsolid waste

10. Explain the engine performance of Ethanol over a petrol engine.

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UNIT V

Part A

1. List the features of HCCI.2. List the features of surface ignition engines.3. Define charge stratification4. What are the advantages of Four valve engine.5. What is a Lambda sensor6. List out various sensors used on an IC engine.7. What is a Lean Burn engine.8. What are the advantages of Gasoline direct engine over conventional gasoline

engine9. What is Surface Ignition.10. What are the advantages of stratified charge engines.11. What are the advantages of HCCI engine.12. What are the disadvantages of HCCI engine.13. What is the principle of Lean burn engines.14. What is a Four valve engine.15. What is a Over Head Valve engine.16. What is an electronic control unit.

Part B

1. Explain the working of a Homogeneous charge combustion engine.2. Draw the sketch of an engine and locate various sensors used on it.3. Explain the working of Common rail direct injection diesel engine with a neat

sketch.4. Explain the working of Gasoline direct injection engine.5. Explain the working of a Four – Valve engine and state the advantages of it.6. Explain the working of a Lean Burn engine.7. Explain the working of a Stratified Charge engine.8. What are the methods of charge stratification9. What is a stratified charge engine. What are the advantages and disadvantages of

stratified charge engine