DieselShip's Online Content Library

Q1.a) Sketch a main engine jacket water cooling system. (8)

b) State Why chemical treatment of such system is necessary. (4)

c) What tests are carried out to ascertain the level of the concentration of the chemicals in the jacket cooling water system. (4)

Q2. (a) Describe with suitable sketches, how lubricating oil is conveyed to top end, bottom end and main bearings in a large bore slow speed engine. (10)

(b) List the causes leading to sudden loss of lubricating oil pressure in the engine. (6)

Q3.a) What is the function of charge air cooler on 2-stroke Diesel Engine? (4)

b) Draw Diagrammatic sketch of charge air cooler. Describe each part. (8)

c) How the efficiency of charge air cooler can be checked? (4)

Q4. a) By drawing a block diagram describe how on a large 2-stroke marine diesel engine, fuel quantity and timing is controlled? (8)

b) What are disadvantages of VIT system? (4)

c) What actions are required in case of VIT system failure? (4)

Q5. a) In modern electronic type 2 stroke main engines which components are replaced by electronic equivalents. (8)

b) Describe by drawing a simple sketch, fuel injection system on electronic type engine. (6)

c) How fuel is injected at right moment in electronic type engine? (2)

Q6. a) With help of a diagrammatic sketch describe Feed water system for the boiler. (8)

b) What is the function of the cascade tank or Hot Well? (4)

c) Why the water in the Hot well is kept heated? What is the temperature of hot well normally maintained and how? (4)

Q7. a) Draw diagrammatic sketch, describing each part of thrust block. (8)

b) Describe how propeller thrust is transmitted to hull? (4)

c) how to measure thrust clearance’s on the block? (4)

Q8. a) Draw Lubricating oil piping diagram will all fittings for a trunk type 4- stroke Diesel Engine. (8)

b) What properties are required for a Lubricating oil used in a 4-stroke Diesel Engine? (4)

c) What is the effect on lubricating oil due to various contaminants during operation of engine? (4)

Q9. For 2-Stroke Marine Diesel Engine

a) Describe problems in achieving good lubrication of Cylinder Liner. (6)

b) What are the properties of good cylinder oil? (4)

c) What are the consequences of under and over lubrication of liner? (6)