QUESTION CARRIES 2 MARKS Model Question Papers 1. Define engine. Give their classification? 6 th Semester I.C. ENGINE [ME-604] UNIT -1 2. Define the performance parameters of IC engine ie indicated power, mean effective pressure Indicated thermal efficiency, brake power, mechanical efficiency. 3. Define the terms- Clearance, volume, swept volume, compassion ratio. QUESTIONS CARRY 5 MARKS 1. Explain with the help of P-V diagram, how the actual cycle differ from theoretical cycle in S.I. engine? 2. Compare spark ignition and compression ignition engine. Write the difference between auto and diesel engine. 3. What is the use of heat balance sheet of an engine? Mention the various items to be determined to compete the heat balance sheet. 4. Explain the factors responsible for causing devialious between theovetical and actual cycles of I.C. engine? 5. Explain the valve timing diagram of four stroke S.I. engine? QUESTIONS CARRY 7 MARKS- 1. Show by suitable sketched the following types cylinder arrangements 1. Suliine engine 2.V- engine. 3. Radial Engine 4. Data type engine. 2. Write a short note on filling order. UNIT 2 1. Write short note on Octane number & octane number and HUCR.
2. Explain - 1.Pre-ingition 2.Auto-ignition 3.Detonation. 3. What are the requirements of a good combustion chamber is S.I. engines. 4. Why is spark advance required? Discuss the factors that affect ignition timing. 5. What do you mean by normal and abnormal combustion? Discuss the detonation theories of S.I. engine. Enlist variables affecting detonation in S.I. engine. 6. What is ignition lag? Discuss the effect of engine variable on ignition lag? 7. How does a flame front propagate? Discuss the factors affecting the flame speed? 8. Explain different stages of combustion in a S.I. engine? 9. Explain pre ignition phenomenon. Give its causes and its remedies? 10. Discuss the different types of combustion chambers of S.I. engine? 11. Discuss the general principle of engine combustion chamber design? UNIT -3 1. Explain in detail the combustion process of C.I. engine with the help of P-Q diagram? 2. What do you understand by knock inhibitions 3. Explain with the help of neat diagram the working of rotary engine? 4. Explain squish, swirl in C.I. engine? 5. What is a diesel knock? Explain. How it affects engine performance? Discuss effects of the following on it A. Fuel Quality. B. Degree of atomization C. Compression ratio. 6. What is meant by delay period discuss the variable affecting the delay period? 7. How do the injection timing and fuel quality affect the engine knock? 8. Explain various types of combustion chambers used in CI engines? 9. Explain the phenomenon of knock in SI Engine and compare it with C.I. engine Knock. 10. Mention the factors to be considered for the design of combustion chambers of C.I. engine. UNIT IV 1. Explain with a neat diagram of the various methods of scavenging process. 2. Explain with a neat diagram the principle, consternation and working on MPFI system. 3. Why do multicylinder engines require richer mixture than single cylinder engine? 4. Enlist various modern earburettons and describe operation of any one of them? 5. Enlist different types of injection system for a diesel engine and describe any two of them 6. What do you understand by ignition living discuss various factors which affect the ignition timing. 7. Write short note on- 1. Soler carburetor. 2. Transsistonized ignition system. 8. Discuss different types of cooling systems of I.C. engine. 9. What is meant by earburettion. 10. Describe battery ignition with the help of a neat sketch.
11. Discuss method of controlling enussion of.? UNIT V 1. What is supercharging? Discuss main object lines of supercharging? 2. Write different methods of super charging? 3. Write the difference between trubo charging and mechanical supercharging? 4. Enlist the limitations and objectives of super charging? 5. Explain the thermodynamic cycle of a super charged I.C. engine. 6. Describe the working of a constant pressure turbocharging in C.I. engine. Write the its merit and demerit? 7. What is the effect of supercharging on follows- a. Power output. b. Mechanical Efficiency. c. Fuel Consumption. 8. Write a note on- Gas turbo charging? 9. Explain the thermodynamic cycle of a super charged IC engine. 10. Explain the methods of turbo charging compare their relative merits. Smoke and harmful gases from I.C. engine? 11. Write a short notes on- A. Governing of I.C. engine. B. Air pollution from I.C. engine. C. Fuel additives and their purpose. D. Lubrication of I.C. engine.
HMT (ME-605) UNIT I Q.1 What is Fourier s law of conduction? 2 Q.2 Define following terms (i) Unit conductance (ii) Thermal resistance 2 Q.3 Explain Analogy between thermal and electrical conductors. 2 Q.4 Define the term diffusivity. 2 Q.5 Differentiate between steady and transient heat conduction. 3 Q.6 Define term thermal diffusivity and explain its physical significance. 3 Q.7 Examine combined heat transfer process. 3 Q.8 Explain Thermal Content resistance in case of conduction 3 Q.9 What is critical thickness of insulation Explain its physical significance. 3 Q.10 Derive an expression for critical radius to insulation of a sphere. 3 Q.11 Derive general heat conduction equation in coutesin coordivate 3 UNIT 2 Q.1 Define fin efficiency. 3 Q.2 Define fin effectiveness. 3 Q.3 Response of thermo couples. 3 Q.4 Define time constant. 3 Q.5 Derive Lumped analogy 3 Q.6 Discuss in brief: - Semifinit body 3 UNIT 3 Q.1- Explain free and forced connection. Q.2 Describe Reyteigtis method for dimensional analysis. Also give is drawbacks.
Q.3 Define nusselt, reynold s, prandtl and Stanton number. Explain their significance in forced convection. UNIT 4 Q.1 What do you mean by fouling. How it can be prevented. Q.2 How is fouling factor. Q.3- How is heat exchanger classified. Why is Counter flow heat exchanger better than parallel flow heat exchanger? Q.4 Define heat exchanger effectiveness and explain its significance. Q.5 NTU E method of heat exchanger analysis Q.6 Derive an expression for LMTD IN case of counter-flow heat exchanger. Q.7 Derive Expression of effectiveness of parallel flow H.E. in terms of NTU and C. UNIT 5 Q.1 Define emissive power. Q.2 Define stean-boltzmann Law Q.3 State and explain Planck s distribution law of radiation, Q.4 Wien s displacement law of radiation. Q.5 What is shape Factor? Q.6 What is the relation between radiosity and ernissive power of black sunface. Q.7 Write short note on: - Electrical network method for radient heat exchange. Q.8 Describe radiation shield. Q.9 Write short note on film wise and drop wise condensation. Q.10 What is boiling? Describe various regimes of pool boiling with the help of heat Swatches.