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DIESEL ENGINES Sample Question Papers for DIPLOMA AUTOMOBILE ENGINEERINGItsMyAcademy.com

DIESEL ENGINES Sample Question Papers for DIPLOMA AUTOMOBILE ENGINEERING

 

TERM END EXAMINATIONS

DIPLOMA AUTOMOBILE ENGINEERING

 SEMESTER-V, YEAR-3

DIESEL ENGINES

Duration -3 Hours                                                                                    Max Marks: 60

 

Note:  1. Attempt any FIVE questions.

           2. All questions carry equal marks.

Questions

  1. Discuss how diesel is rated for antiknock quality and explain how the Cetane number is determined in a laboratory.
  2. Describe the construction and working of the jerk type fuel injection pump.
  3. Describe the mechanism of spray formation and discuss the fuel spray characteristics.
  4. What is meant by delay period and what are the factors that affect the delay period?
  5. What are the requirements of a combustion chamber in a diesel engine and what are their design objectives?
  6. Explain the variables that affect the performance of an automotive diesel engine and describe how the engine performance maps are obtained.
  7. Describe with suitable sketches, the various stages of combustion in a diesel engine.
  8. List the major differences between the actual cycle and the air standard cycle.
  9. Why the efficiency of the actual cycle is lower than that of the air standard cycle. List the various losses in an actual engine.

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