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Q5. With reference to mechanical/hydraulic governors explain:

A. Why flyweights are driven at a higher rotational speed than the engine;

B.  How dead band effects are reduced;

C.  How hunting is reduced;

D.  How the output torque is increased.

Q1. Sketch and describe a turbocharger bearing lubrication system. State the type of bearing employed and explain the advantages and disadvantages of the lubricating system described.

Q6. Evaluate the influence of the following factors upon cylinder and piston ring wear rates; A. Position of rings in relation to piston crown; B. Spread and proximity of coolant passages from liner wall; C. Flow rate and specific heat of coolant; D. Chromium plating of ring faces.

Q5. With reference to the crankshaft and running gear of an engine, explain static balance, Dynamic balance, Torque reaction couple, and Critical speed

Q5. Sketch and describe a cylinder of a two-stroke engine used for main propulsion.

Q1. (a) Sketch a unit for automatic monitoring and regulation of the fuel viscosity.

(b) Describe fuel change over procedures that are followed for switching from distillate fuel to heavy residual oil and vice versa.

Q4. A. Discuss the various types of indicator diagrams and discuss the relevance of this method of determining engine performance.

B. Suggest how engine performance may be assessed other than by taking indicator cards.

Q8. During the past 4 months since you have joined the ship as second engineer a number of main engine exhaust valves have suffered cracking and corrosion at the seating faces. Write a report to the superintendent covering the following points;

A. An explanation detailing how the problem became evident.

B. Your action upon recognising the extent and seriousness of the problem

C. Your reasoned views regarding the positive causes of the problem

D. Your recommendations to avoid future incidents.

Q1. With reference to a particular make of main propulsion unit, describe how the engine is reversed manually and discuss the problems involved and the safety precautions which would be required if the control were operated remote from the machinery space.