DieselShip's Online Content Library

Q1. Suggest a procedure (in about 200 words) to the Chief Engineer, as to how you propose to ensure that the engine room overhead crane is maintained and operated correctly.  What tests certificates are required for the overhead crane, and who is the issuing authority.

Q7. Fatigue is one of the main causes of crankshaft failure - A. Indicate on a sketch the most likely location of a fatigue crack; B. Explain how a fatigue failure is identified; C. Describe how a fatigue crack may be initiated; D. Describe, with the aid of sketches, the methods used to inhibit fatigue cracks.

Q4. An auxiliary engine exhibits a tendency to hunt to such an extent that the engine speed variation prohibits the connection of the machine to the switchboard. A. Discuss the possible causes of hunting; B. Explain how the problem of hunting can be rectified.

Q3. A. State the indication that main boiler generating tube is leaking i. When the amount is small; ii. When the amount is large. B. If boiler tube failure is evident describe immediate action necessary to stabilize plant.

Q8. A. Sketch a transmission shaft coupling which enables the propeller shaft to be withdrawn outward.

B. (i) describe the coupling and method fitting and dismantling;

(ii) state how the grip of the coupling can be checked when fitted;

(iii) why should coupling bolts be interference fits

(iv) State what precaution should be taken when dismantling the coupling.

(V) State reasons why the metal that the intermediate and tail end remission shaft are made of.

Q9. Write short note on the followings –

A. Metal – locking;

B.TIG and MIG welding;

C. Brazing;

D. Soldering.

Q9. A. With reference to the insulation testing of marine electrical plant: - I. State the reasons for insulation testing; II. State the precautions to be observed when testing intrinsically safe equipment. B. Describe the overhaul of d.c. motor which has been subjected to excessively damp condition or flooding with seawater.

Q8. Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.

Q8. Explain how each of the following conditions contributes to the satisfactory performance of oil centrifuges. A. Correct bowl speed; B. Cleanliness of bowl; C. Low rate of feed to the bowl; D. Contaminated oil preheated prior to centrifuging; E. Contaminated oil allowed standing for an appreciable time prior to centrifuging.