BASIC MECHANICAL ENGINEERING
Module - 4
1. Draw the p-v diagram of a diesel cycle and define the terms (i) Compression ratio, (ii)
Expansion ratio, and (iii) Cut-offratio related to the Diesel cycle
2. With the help of a neat sketch show the important parts of an internal combustion engine
3. Explain the MPFI system with block diagram. Also give its advantages
4. Give the concept of hybrid engines
5. An engine working on Diesel cycle has diameter 150 mm and stroke 200 mm. The
clearance volume is l0 % of the swept vo_lume. Determine the compression ratio and air
standard efficiency of the engine if the cut-off takes place at6o/o ofthe stroke.
6. Sketch the P-v and T-s diagram of a Carnot cycle and List the processes
7. In an air standard Otto cycle the compression ratio is 7 and compression begins at 35oC,
0.1MPa. The maximum temperature of the cycle is 1100oC. Find i) Heat supplied per kg
of air, ii) Work done per kg of air, iii)Cycle efficiency Take Cp = 1.005 kJ/kgK and
Cv=0.718 kJ/kgK
8. Explain the working of a 4 stroke SI engine with neat sketches.
9. Explain the fuel system of petrol engine
10. Explain the fuel system of diesel engine
11. Compare 2 stroke and 4 stroke engines
12. Compare CI & SI engines
13. Short note on CRDI
14. Otto cycle , carnot cycle, diesel cycle
15. With the help of a suitable sketch explain main components of an engine
16. How IC engines are classified
17. Why petrol engines are called SI engines
18. Why diesel engines are called CI engines
19. Working of 4 stroke petrol engine with fig
20. Working of 4 stroke diesel engine with fig
21. Working of 2 stroke petrol engine
22. Working of 2 stroke diesel engine
23. Compare 4 stroke & 2 stroke engines
24. With the help of block diagram explain air system for petrol engine
25. With the help of block diagram explain fuel system for petrol engine
26. Fuel system for diesel engine
27. Types of cooling system in IC engines
28. Compare series hybrid and parallel hybrid
29. Advantages and disadvantages of hybrid engines
30. Advantages and disadvantages of CRDI system
31. Advantages and disadvantages of MPFI system.
32. An engine working on diesel cycle has diameter 150mm and stroke 200mm. The clearance
volume is 20% of the swept volume. Determine the compression ratio and air standard
efficiency of the engine if the cut off takes place at 10% of the stroke?
33. A petrol engine takes air at 100 kPa and 300 K. Determine the air standard efficiency of
the engine if the clearance volume is 10 % of that of cylinder volume. Also find the
maximum pressure if the maximum temperature is limited to 600 0C.
