Compression ratio and mean effective pressure for cycle

Question

Answer the following questions in detail.

Question 1) What are two basic types of internal combustion engines? Write down the fundamental differences between the two?

Question 2) Draw Ericsson cycle on P-V and T-S diagram.

Question 3) What do you understand by delay period? Describe in detail.

Question 4) Which has a higher sped, a SI engine of a CI engine? Why?

Question 5) How SI engines fuels are rated?

Question 6) Why very rich mixture is required for Idling?

Question 7) Describe the requirements of an Ideal injection.

Question 8) Why supercharging of CI engines is done?

Question 9) What are the different methods for measurement of brake power?

Question 10) SI engines are made of smaller size, explain why in detail?

Question 11) Describe in detail (a) Indicated thermal efficiency. (b) Mechanical efficiency and Brake thermal efficiency. What is the relation between the three?

Question 12) In an Otto cycle at 15° and 1.05 bar is compressed adiabatically until the pressure is 13 bar. Heat is added at constant volume until the pressure rises to 35 bar. Compute air standard efficiency, the compression ratio and mean effective pressure for the cycle. Take C_V= 0.718, R= 0.287.

Question 13) What is the significance of delay period? Should the delay period be zero? Describe variable effecting the delay period.

Question 14) Describe the working of single jet carburetor with appropriate sketch. Write down its limitations? Describe in detail.

Question 15) Sketch value timing diagram of two stroke and four engines and compare them with the actual.