Dr. A.P.J. Abdul Kalam University BE IV SEM (ME) Energy Conversion [ME227T] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Fourth Semester Main Examination, June-2021

Energy Conversion [ME227T]

Branch - ME

Time: 3:00 Hrs Max Marks 70

Note : (i) Attempt any five questions.

(ii) All question carry equal marks.

Q.1 a) What is the importance of lubrication in CI engines? Enumerate

 lubrication system explain any one of them with neat sketch.

b) Explain the factors that limits the extent of supercharging of SI and

CI engines

Q.2 a) Explain the thermodynamic cycle of a supercharged IC engine.

b) Describe the operation of splash lubrication system with the help of

neat sketch.

Q.3 a) Explain with neat sketch the phase of combustion in CI engine.

b) Explain briefly basic method of generation air swirl in CI engines

combustion chambers.

Q.4 a) Explain with neat sketch the working principle of a solex

 carburetor.

b) What are the functional requirements of injection system? Explain

injection system which is used in multi-cylinder diesel engine.

Q.5 a) What do you understand by pre-ignition in S.I. engine? What are its

causes and remedy?

b) Draw and explain the performance characteristics curve of SI engines.

Q.6 a) What are the two basic types of internal combustion engines? What is the

fundamental difference between them?

b) Explain valve timing diagram for four stroke cycle spark ignition engine.

Q.7 a) Explain the phenomenon of auto-ignition. Explain how auto-ignition is

responsible for knocking in SI engines.

b) Explain the main factors that influence the flame speed.

Q.8 Write the short note:

i) Turbo charger ii) Scavenging system

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