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Q3. Discuss the new generation marine diesel engines. With specific reference to any make, describe in detail the fuel injection system used. Compare the ‘Emission’ and ‘Economy’ modes of such engines.

Q8. Referring to latest developments in Turbo charger application in marine diesel engines, write short notes on the following:

(a) Power turbine generators.                          (b) Hybrid turbo chargers.

(c) Electro-assist turbo chargers.

Q1. Describe following terms with respect to Diesel Engine with suitable diagram. (16)

a) Piston Stroke

b) Swept Volume

c) Clearance volume

d) Compression ratio.

Q3. Describe materials used with composition and reasons for use with following components of Diesel Engine Plant:

a) Gudgeon pins and connecting rod bolts. (4)

b) Gear Wheels (4)

c) Upper Piston Parts. (4)

d) Fuel Nozzles. (4)

Q8. Describe an emergency source of electrical power, using a diesel engine driven alternator, with particular attention to:

 (a) Location (5)

 (b) Starting arrangement (5)

 (c) The loads they can supply and duration (5)

 (d) The care and tests required to ensure reliable operation (5)

Q7. With respect to a marine diesel engine:

a) What are the different types of lubrication system that you would see on the main and auxiliary machineries? (8)

b) What are the desirable qualities for the lubricating oil selected for each of the following duties: (8)

i) Auxiliary diesel engine

ii) Stern tube bearings

iii) Refrigeration system

iv) turbocharger

Q9. Discuss the causes, possible associated hazards and lowering of thermal efficiency consequent on poor combustion in a Diesel engine cylinder. Illustrate your answer by means of indicator cards (16)