DieselShip's Online Content Library

Q1 A. State FOUR operational conditions that may lead to vibration of the main transmission shafting; B. Suggest methods to reduce the vibration levels that may occur in the main transmission shafting.

Q5. A. What limits the power in a cylinder of a given size? B. State the results if an attempt to raise the power by injecting more fuel into the cylinder is made

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. A. Describe clearly how you would deal with a fire in the scavenge space of a marine diesel engine; Explain the cause of such fires and state the measures which can be taken to limit their occurrence?

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.

Q2. A. State with reasons the main causes of normal cylinder liner wear; B. State TWO forms of abnormal liner wear, explaining how EACH may be caused; C. Explain how cylinder liner wear may be kept within acceptable limit

Q4. Give reasoned opinion as to the validity of the following - Hydraulic operation of fuel injectors are to be referred to mechanical operation; Combustion conditions within the cylinder are a good indication of injector condition; Inadequate fuel filtration is the principle cause of injector malfunction.

Q8. Explain in detail the main engine problem that may arise due to fuel catalytic fines and the best shipboard practice that may be adopted to combat the problem.