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Q2. With reference to four stroke diesel engine emission control:

(a) Describe how the Miller Cycle operates to control NOx emissions;

(b) Describe, with reasons, the modifications needed for a medium speed engine to operate on the Miller Cycle;

(c) give the advantages and disadvantages of closed against open scrubber systems.

Q8. With reference to four stroke diesel engine emission control:

(a) Describe how the Miller Cycle operates to control NOx emissions;

(b) Describe, with reasons, the modifications needed for a medium speed engine to operate on the Miller Cycle;

Q9. With reference to Modern Diesel Engine describe the features of High-pressure Miller cycle and discuss the following. (16)

(a) Reduction in Air Temperature due to Miller Cycle

(b) Recovery of Pressure in the Combustion chamber during the Miller cycle

(c) Effect of Miller Cycle on specific fuel consumption and NOx emission

(d) The impact on various parameters during low load operation using Miller cycle.