Q8. A. Sketch, and describe, a valve suitable for reducing air pressure and maintaining the reduced pressure within close limits. B. Describe the processes through which air from the starting air receivers should be treated before it is used in a pneumatic control system.
Q7. A rudder of a vessel requires extensive welding repairs and as Second Engineer you are requested to supervise the repairs.
A. Suggest a suitable type of welding process;
B. State, with reasons, FOUR common welding defects.
C. State what tests may be carried out before returning the rudder to service.
Q6. With regards to main transmission shaft flange coupling arrangements:
A. Sketch a hollow type coupling bolt and the hydraulic head/nut and loading rod which are used to fit it.
B. Describe how the bolt is fitted.
C. State the advantage of the hollow coupling bolt as compared to the traditional type of coupling bolt.
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