Name of the College : DMI College OF Engineering
Subject : Automotive Engines
Website : dmice.ac.in
Document type : Question Bank
Download Automotive Engines Question Paper : https://www.pdfquestion.in/uploads/dmice.ac.in/462-01AUG14_SEM3-Civil%20.pdf
Automotive Engines Question Paper
AT 6301 – AUTOMOTIVE ENGINES :
Time : 3 Hours
Answer ALL Questions :
Max.Marks : 100
Part – A
(10 x 2 = 20 Marks)
1. Classify the internal combustion engines based on cylinder arrangement and give examples
2. Write the drawbacks of 2 stroke powered engines when compared to 4 stroke powered engines.
3. What is meant by firing order? Possible firing order used in 4 and 6 cylinder engines?
4. What are the various types of combustion chambers used in SI engines?
5. The compression ratio diesel engine is 16.If cut-off place 8 % stoke volume, Calculate the air-standard efficiency of cycle.
6. What is the principle of a carburetor? Name the major parts in it.
7. Illustrate various types of nozzles used in diesel engines.
8. Why is rich mixture required for idling?
9. Draw the injection rate characteristic of multi-hole nozzle and state its advantages.
10. What is the difference between a constant choke carburetor and a constant vacuum carburetor?
Part – B
( 5 x 16 = 80 marks)
11. a) Describe the construction and working of 4 stroke SI and CI engine with neat sketch
OR
b) Explain in detail about the Construction of engines with its components sketches.
12. a) Describe the construction and working of 2 stroke SI and compare SI and CI engines.
OR
b) Explain various process of Otto , Diesel and Dual Cycles with p-V and T-s diagrams.
13. a) Compare four stroke and two stroke cycle engines and bring out their relative merits and demerits
OR
b) Discuss the air –fuel ratio requirements of a petrol engine from no load to full load.
14. a) (i) Write a short note on emission characteristics of SI engine with air-fuel ratio. (4)
(ii) Describe with neat sketch the working of S.U carburetor. (12)
OR
b) What is the Purpose of governor in diesel engine? Explain the principle and working of pneumatic governor with a neat sketch.
15. a) Explain in detail about the working of fuel injection pump and fuel injector
OR
b) Explain in detail about the unit injector and common rail injection systems.