Thermal Engineering-I

THERMAL ENGINEERING-I ASSIGNMENT-I

1. (a).what are the common problems faced with CI Engines in cold conditions and discuss them

(b).Discuss about various methods used in winter for easy starting of engine

2. (a).How does the type of combustion chamber in CI engine influence the fuel system design and explain

(b)With help of neat sketch explain squish in C I Engine.

3. (a).Explain the term delay period as reference to CI engine. Explain the effect of following operating parameters on delay period in CI engine.(a) speed(b)fuel-air ratio(c)injection advance(d) cetane number of fuel

(b) Bring out clearly the process of combustion in CI engine and also explain various stags of combustion

4. (a).Explain phenomenon of knock in CI engine and compare it with SI engine knocking

(b). Explain with figures, any two types of combustion chamber used in CI engine

5. What is meant by abnormal combustion and explain the phenomenon of knock in SI engine.

6. Explain how high power output and thermal efficiency obtained in SI engines

7. (a) Explain the various factors that influence the flame speed

(b).What is flame front propagation and explains

8. (a).explain the types of combustion chambers for SI engines with neat sketch

(b) Explain battery ignition system for SI engine

9. (a) explain the working of fuel pump with neat sketch

(b).Explain the ideal and actual port timing diagram of 2 stoke engine

10 .Explain the working of simple carburetor

11. Compare SI and CI engine

12. Describe with neat sketch h the working of crank case scavenged 2 stroke engine

13.Explain 2 types of cooling systems and compare them

14.(a) .With neat sketch explain 4 stroke SI Engine

(b) Explain reasons for cooling an engine

15. Discuss briefly the loss due to gas exchange process

16.Define volumetric efficiency and discuss the effect of various factors effecting volumetric efficiency

17.What are the stages of combustion in SI engine and explain them.