DieselShip's Online Content Library

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.

Q2. (a) Draw sectional diagram of main engine piston showing each part. Show cooling passages for oil cooled piston (12)

(b) Name the different materials used for the various components of the piston as indicated to the answer above. (4)

Q3. (a) Explain, why is it important to measure bearing clearances in a diesel engine? (4)

(b) What is Bridge gauge? How is the Bridge gauge used? Explain with a diagram. (6)

(c) What are other recommended methods for checking bearing clearances. (6)

Q5. (a) What is a Exhaust Gas Economizer? Draw diagrammatic Sketch of Exhaust gas Economizer (EGE) naming each component (8)

(b) How is steam Generation controlled in Exhaust Gas Economizers? (4)

(c) Briefly describe procedure to maintain efficiency of such an E.G.E. (4)

Q5. i) While arrival Port-What checks are made on main engine?

i Before arrival. (4)

ii After arrival. (2)

ii) While Departure Port what checks are made on main engine and other machineries in Engine room. (4)

iii) What precautions are taken while changing over main engine fuel from ECA region /high seas and vice versa. (6)

Q6. i) what is thin shell bearing? Describe with Sketch the construction of thin shell bearing, name each part. (6)

ii) What materials are used in construction of this type of bearing. (4)

iii) Describe superiority of thin shell bearing over its counterpart of thick shell bearing type. (6)

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)

Q8. i) What is a Mechanical Hydraulic Governor? (4)

ii) By drawing a suitable diagram, explain the working of a Mechanical Hydraulic Governor. (8)

iii) What is Speed Droop, describe the function of speed droop on the governor. (4)

Q9. i) Describe what is nozzle burning of fuel Injectors and causes of nozzle burning on Marine Diesel engine. (6)

ii) What investigations are required to find causes for nozzle burning? (6)

iii) What actions are required to reduce the risk of Nozzle Burning? (4)